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C++ || Input/Output – Using An Array, Sort Names From a Text File & Save The Sorted Names To A New Text File

February 01, 2012 admin No comments

Since we previously discussed how to sort numbers which is contained in an integer array, it is only fitting that we display a program which sorts characters that are stored in a character array.

This is an interactive program which first displays a menu to the user, allowing them to choose from 6 different modes of operation. The 6 options are described as followed:

R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit

From the available choices, the user has the option of reading in names from a file, manually entering in names themselves, displaying the current names in the array, sorting the current names in the array, clearing the current names in the array, and finally quitting the program. When the user chooses to quit the program, whatever data which is currently stored within the array will automatically be saved to the output text file.

REQUIRED KNOWLEDGE FOR THIS PROGRAM

Fstream Ifstream Ofstream Character Arrays 2D Arrays Working With Files Pass By Reference While Loops For Loops Bubble Sort Functions Switch Statements Boolean Expressions Toupper Strcpy Strcmp

The data file that is used in this example can be downloaded here.

Note: In order to read in the data .txt file, you need to save the .txt file in the same directory (or folder) as your .cpp file is saved in. If you are using Visual C++, this directory will be located in

Documents > Visual Studio 2010 > Projects > [Your project name] > [Your project name]

NOTE: On some compilers, you may have to add #include < cstdlib> and #include < cstring> in order for the code to compile.





		
		
			Sorting Names Contained In A Char Array
			
C++
			
			#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;

// const variable indicating how many names the array can hold
const int TOTALNAMES = 100;

// function prototypes
void DisplayMenu();
int ReadInData(char names[][50], ifstream &infile);
void GetUserData(char names[][50], int numberOfNames);
void ClearArray(char names[][50], int numberOfNames);
void SortArray(char names[][50], int numNames);
void DisplayArray(char names[][50], int numNames);
void SaveArrayToFile(char names[][50], int numberOfNames, ofstream &outfile);

int main()
{
	// declare variables
	ifstream infile;
	ofstream outfile;
     char names[TOTALNAMES][50];
	char userResponse = 'Q';
     int numberOfNames = 0;

	// display menu to user
	DisplayMenu();
	cin >> userResponse;

	// keep looping thru the menu until the user
	// selects Q (Quit)
	while(toupper(userResponse)!='Q')
	{
		// switch statement indicating the available choices
		// the user has to make
		switch(toupper(userResponse))
		{
		case 'R': 
			numberOfNames = ReadInData(names, infile);
			break;
		case 'E': 
			cout << "nPlease enter the number of names you want to sort: ";
			cin >> numberOfNames;
			GetUserData(names,numberOfNames);
			break;
		case 'D': 
			DisplayArray(names, numberOfNames);
			break;
		case 'C': 
			ClearArray(names,numberOfNames);
			numberOfNames=0;
			break;
		case 'S': 
			SortArray(names, numberOfNames);
			break;
		case 'Q':
			break;
		default: cout << "nThe selected option is not apart of the list!nPlease try again..";
			break;
		}
		// creates a line seperator after each task is executed
		cout<<endl;
		cout.fill('-');
          cout<<left<<setw(30)<<""<<right<<setw(30)<<""<<endl; 

		// re-display's the menu to the user
		DisplayMenu();
		cin >> userResponse;
	}

	// after the user is finished manipulating the 
	// data, save the names to the output file
	SaveArrayToFile(names, numberOfNames, outfile);

    return 0;
}// end of main

// ============================================================================

// displays options to user
void DisplayMenu()
{
	cout<<"   Welcome to the name sorting program...";
	cout<<"nFrom the following menu, select an option";
	cout<<"nR - Read in names from a file for sorting";
	cout<<"nE - Enter in names manually for sorting";
	cout<<"nD - Display the current names in the array";
	cout<<"nS - Sort the current names in the array";
	cout<<"nC - Clear the current names in the array";
	cout<<"nQ - Quitn";
     cout<<"n>> ";
}// end of DisplayMenu

// ============================================================================

// reads in data from a file
int ReadInData(char names[][50], ifstream &infile)
{
	int numberOfNames=0;
	
	// open input file
	infile.open("INPUT_UNSORTED_NAMES_programmingnotes_freeweq_com.txt");

	if(infile.fail())
	{
		cout<<"Input file could not be found!n"
			<<"Please place the input file in the correct directory..";
		return 0;
	}
	else
	{
		cout << "nReading in data from the file...";
		while(infile.good())
		{
			infile >> names[numberOfNames];
			++numberOfNames;
		}
		cout << "nSuccess!";
	}
	infile.close(); // close the infile once we are done using it
	return numberOfNames;
}// end of ReadInData

// ============================================================================

// gets data from user (names) for direct input
void GetUserData(char names[][50], int numberOfNames)
{
    cout << "nPlease enter "<<numberOfNames<<" names" << endl;

	for(int index=0; index < numberOfNames; ++index)
	{
		cout<<"nName #"<<index+1<<": ";
		cin >> names[index];
    }
}// end of GetUserData

// ============================================================================

// clears the data contained in the array
void ClearArray(char names[][50], int numNames)
{
	if(numNames==0)
	{
		cout<<"nThe array is currently empty!n";
	}
	else
	{
		cout<<"nDeleting the data contained in the array...";
		for(int index=0; index < numNames; ++index)
		{
			strcpy(names[index],"");
		}
		cout << "nClearing Complete!";
	}
}// end of ClearArray

// ============================================================================

// sorts the array via 'bubble sort'
void SortArray(char names[][50],int numNames)
{
	bool sorted = false;
	char temp[50];
	
	if(numNames==0)
	{
		cout<<"nThe array is currently empty!n";
	}
	else
	{
		cout << "nSorting the names contained in the array...";
		// this is the 'bubble sort' and will execute only
		// if there is more than 1 name contained within the array
		// If there is only one name contained in the array, 
		// there is no need to sort anything
		while((sorted == false) && (numNames > 1))
		{
			sorted = true;
			for (int index=0; index < numNames-1; ++index)
			{
				if (strcmp(names[index], names[index+1]) > 0)
				{
					strcpy(temp,names[index]);
					strcpy(names[index], names[index+1]);
					strcpy(names[index+1], temp);
					sorted = false;
				}
			}
		}
		cout << "nSuccess!";
	}
}// end of SortArray

// ============================================================================

// saves the current data which is in the arrya to the output file
void SaveArrayToFile(char names[][50], int numberOfNames, ofstream &outfile)
{
	// open output file
	outfile.open("OUTPUT_SORTED_NAMES_programmingnotes_freeweq_com.txt");

	if(outfile.fail())
	{
		cout<<"Error creating output file!";
		return;
	}
	else
	{
		if(numberOfNames==0)
		{
			cout<<"nThe array contained no names.nThere was no data to save to the output file...n";
			outfile<<"The array contained no names.nThere was no data to save to the output file...n";
		}
		else
		{
			cout<<"nSaving the current contents of the array to the ouptut file..";
			outfile<<"Sorted items which were contained within the array..n";
			for(int index=0; index < numberOfNames; ++index)
			{
				outfile <<"Name #"<<index+1<<": "
					<< names[index]<<endl;
			}
			cout << "nSuccess!n";
		}
	}
	outfile.close();
}// end of SaveArrayToFile

// ============================================================================

// displays the current contents of the array to the user
// via cout
void DisplayArray(char names[][50], int numNames)
{
	if(numNames==0)
	{
		cout<<"nThe array is currently empty!n";
	}
	else
	{
		cout << "nThe values in the array are:n";
		for (int index=0; index < numNames; ++index)
		{
			cout << names[index] << endl;
		}
		cout<<"nThere is currently "<<numNames<<" names in the array!n";
	}
}// http://programmingnotes.org/
			
				
					
				
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						#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;
 
// const variable indicating how many names the array can hold
const int TOTALNAMES = 100;
 
// function prototypes
void DisplayMenu();
int ReadInData(char names[][50], ifstream &infile);
void GetUserData(char names[][50], int numberOfNames);
void ClearArray(char names[][50], int numberOfNames);
void SortArray(char names[][50], int numNames);
void DisplayArray(char names[][50], int numNames);
void SaveArrayToFile(char names[][50], int numberOfNames, ofstream &outfile);
 
int main()
{
	// declare variables
	ifstream infile;
	ofstream outfile;
     char names[TOTALNAMES][50];
	char userResponse = 'Q';
     int numberOfNames = 0;
 
	// display menu to user
	DisplayMenu();
	cin >> userResponse;
 
	// keep looping thru the menu until the user
	// selects Q (Quit)
	while(toupper(userResponse)!='Q')
	{
		// switch statement indicating the available choices
		// the user has to make
		switch(toupper(userResponse))
		{
		case 'R': 
			numberOfNames = ReadInData(names, infile);
			break;
		case 'E': 
			cout << "nPlease enter the number of names you want to sort: ";
			cin >> numberOfNames;
			GetUserData(names,numberOfNames);
			break;
		case 'D': 
			DisplayArray(names, numberOfNames);
			break;
		case 'C': 
			ClearArray(names,numberOfNames);
			numberOfNames=0;
			break;
		case 'S': 
			SortArray(names, numberOfNames);
			break;
		case 'Q':
			break;
		default: cout << "nThe selected option is not apart of the list!nPlease try again..";
			break;
		}
		// creates a line seperator after each task is executed
		cout<<endl;
		cout.fill('-');
          cout<<left<<setw(30)<<""<<right<<setw(30)<<""<<endl; 
 
		// re-display's the menu to the user
		DisplayMenu();
		cin >> userResponse;
	}
 
	// after the user is finished manipulating the 
	// data, save the names to the output file
	SaveArrayToFile(names, numberOfNames, outfile);
 
    return 0;
}// end of main
 
// ============================================================================
 
// displays options to user
void DisplayMenu()
{
	cout<<"   Welcome to the name sorting program...";
	cout<<"nFrom the following menu, select an option";
	cout<<"nR - Read in names from a file for sorting";
	cout<<"nE - Enter in names manually for sorting";
	cout<<"nD - Display the current names in the array";
	cout<<"nS - Sort the current names in the array";
	cout<<"nC - Clear the current names in the array";
	cout<<"nQ - Quitn";
     cout<<"n>> ";
}// end of DisplayMenu
 
// ============================================================================
 
// reads in data from a file
int ReadInData(char names[][50], ifstream &infile)
{
	int numberOfNames=0;
	
	// open input file
	infile.open("INPUT_UNSORTED_NAMES_programmingnotes_freeweq_com.txt");
 
	if(infile.fail())
	{
		cout<<"Input file could not be found!n"
			<<"Please place the input file in the correct directory..";
		return 0;
	}
	else
	{
		cout << "nReading in data from the file...";
		while(infile.good())
		{
			infile >> names[numberOfNames];
			++numberOfNames;
		}
		cout << "nSuccess!";
	}
	infile.close(); // close the infile once we are done using it
	return numberOfNames;
}// end of ReadInData
 
// ============================================================================
 
// gets data from user (names) for direct input
void GetUserData(char names[][50], int numberOfNames)
{
    cout << "nPlease enter "<<numberOfNames<<" names" << endl;
 
	for(int index=0; index < numberOfNames; ++index)
	{
		cout<<"nName #"<<index+1<<": ";
		cin >> names[index];
    }
}// end of GetUserData
 
// ============================================================================
 
// clears the data contained in the array
void ClearArray(char names[][50], int numNames)
{
	if(numNames==0)
	{
		cout<<"nThe array is currently empty!n";
	}
	else
	{
		cout<<"nDeleting the data contained in the array...";
		for(int index=0; index < numNames; ++index)
		{
			strcpy(names[index],"");
		}
		cout << "nClearing Complete!";
	}
}// end of ClearArray
 
// ============================================================================
 
// sorts the array via 'bubble sort'
void SortArray(char names[][50],int numNames)
{
	bool sorted = false;
	char temp[50];
	
	if(numNames==0)
	{
		cout<<"nThe array is currently empty!n";
	}
	else
	{
		cout << "nSorting the names contained in the array...";
		// this is the 'bubble sort' and will execute only
		// if there is more than 1 name contained within the array
		// If there is only one name contained in the array, 
		// there is no need to sort anything
		while((sorted == false) && (numNames > 1))
		{
			sorted = true;
			for (int index=0; index < numNames-1; ++index)
			{
				if (strcmp(names[index], names[index+1]) > 0)
				{
					strcpy(temp,names[index]);
					strcpy(names[index], names[index+1]);
					strcpy(names[index+1], temp);
					sorted = false;
				}
			}
		}
		cout << "nSuccess!";
	}
}// end of SortArray
 
// ============================================================================
 
// saves the current data which is in the arrya to the output file
void SaveArrayToFile(char names[][50], int numberOfNames, ofstream &outfile)
{
	// open output file
	outfile.open("OUTPUT_SORTED_NAMES_programmingnotes_freeweq_com.txt");
 
	if(outfile.fail())
	{
		cout<<"Error creating output file!";
		return;
	}
	else
	{
		if(numberOfNames==0)
		{
			cout<<"nThe array contained no names.nThere was no data to save to the output file...n";
			outfile<<"The array contained no names.nThere was no data to save to the output file...n";
		}
		else
		{
			cout<<"nSaving the current contents of the array to the ouptut file..";
			outfile<<"Sorted items which were contained within the array..n";
			for(int index=0; index < numberOfNames; ++index)
			{
				outfile <<"Name #"<<index+1<<": "
					<< names[index]<<endl;
			}
			cout << "nSuccess!n";
		}
	}
	outfile.close();
}// end of SaveArrayToFile
 
// ============================================================================
 
// displays the current contents of the array to the user
// via cout
void DisplayArray(char names[][50], int numNames)
{
	if(numNames==0)
	{
		cout<<"nThe array is currently empty!n";
	}
	else
	{
		cout << "nThe values in the array are:n";
		for (int index=0; index < numNames; ++index)
		{
			cout << names[index] << endl;
		}
		cout<<"nThere is currently "<<numNames<<" names in the array!n";
	}
}// http://programmingnotes.org/

QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

Once compiled, you should get this as your output
(Remember to include the input file)

Welcome to the name sorting program... From the following menu, select an option R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit
>> d The array is currently empty! ------------------------------------------------------------ Welcome to the name sorting program... From the following menu, select an option R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit >> q The array contained no names. There was no data to save to the output file... ------------------------------------------------------------ Welcome to the name sorting program... From the following menu, select an option R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit >> e Please enter the number of names you want to sort: 3 Please enter 3 names Name #1: My Name #2: Programming Name #3: Notes ------------------------------------------------------------ Welcome to the name sorting program... From the following menu, select an option R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit >> d The values in the array are: My Programming Notes There is currently 3 names in the array! ------------------------------------------------------------ Welcome to the name sorting program... From the following menu, select an option R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit >> s Sorting the names contained in the array... Success! ------------------------------------------------------------ Welcome to the name sorting program... From the following menu, select an option R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit >> d The values in the array are: My Notes Programming There is currently 3 names in the array! ------------------------------------------------------------ Welcome to the name sorting program... From the following menu, select an option R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit >> c Deleting the data contained in the array... Clearing Complete! ------------------------------------------------------------ Welcome to the name sorting program... From the following menu, select an option R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit >> r Reading in data from the file... Success! ------------------------------------------------------------ Welcome to the name sorting program... From the following menu, select an option R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit >> d The values in the array are: My Programming Notes C++ Java Assembly Lemon Dark Light Black High Low Cellphone Cat Dog Penguin Japan Peace Love Color White One Brain Eggplant Phalanx Countenance Crayons Ben Dover Eileen Bob Downe Justin Elizebeth Rick Rolled Sam Widge Liza Destruction Grove Aardvark Primal Sushi Victoria Ostrich Zebra Scrumptious Carbohydrate Sulk Ecstatic Acrobat Pneumonoultramicroscopicsilicovolcanoconiosis English Kenneth Jessica Pills Pencil Dragon Mint Chocolate Temperature Cheese Rondo Silicon Scabbiest Palpitate Invariable Henpecked Titmouse Canoodle Boobies Pressure Density Cards Twiat Tony Pink Green Yellow Duck Dodge Movie Zoo Xiomara Eggs Marshmallows Umbrella Apple Panda Brush Handle Door Knob Mask Knife Speaker Wood Orient Love There is currently 100 names in the array! ------------------------------------------------------------ Welcome to the name sorting program... From the following menu, select an option R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit >> s Sorting the names contained in the array... Success! ------------------------------------------------------------ Welcome to the name sorting program... From the following menu, select an option R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit >> d The values in the array are: Aardvark Acrobat Apple Assembly Ben Black Bob Boobies Brain Brush C++ Canoodle Carbohydrate Cards Cat Cellphone Cheese Chocolate Color Countenance Crayons Dark Density Destruction Dodge Dog Door Dover Downe Dragon Duck Ecstatic Eggplant Eggs Eileen Elizebeth English Green Grove Handle Henpecked High Invariable Japan Java Jessica Justin Kenneth Knife Knob Lemon Light Liza Love Love Low Marshmallows Mask Mint Movie My Notes One Orient Ostrich Palpitate Panda Peace Pencil Penguin Phalanx Pills Pink Pneumonoultramicroscopicsilicovolcanoconiosis Pressure Primal Programming Rick Rolled Rondo Sam Scabbiest Scrumptious Silicon Speaker Sulk Sushi Temperature Titmouse Tony Twiat Umbrella Victoria White Widge Wood Xiomara Yellow Zebra Zoo There is currently 100 names in the array! ------------------------------------------------------------ Welcome to the name sorting program... From the following menu, select an option R - Read in names from a file for sorting E - Enter in names manually for sorting D - Display the current names in the array S - Sort the current names in the array C - Clear the current names in the array Q - Quit >> q
Saving the current contents of the array to the ouptut file.. Success!

C++ || Find The Day Of The Week You Were Born Using Functions, String, Modulus, If/Else, & Switch

January 12, 2012 admin No comments

Click Here For Updated Version Of Program

This program displays more practice using functions, modulus, if and switch statements.

REQUIRED KNOWLEDGE FOR THIS PROGRAM

Functions Strings Modulus If/Else Statements Switch Statements Knowledge of Leap Years A Calendar

This program prompts the user for their name, date of birth (month, day, year), and then displays information back to them via cout. Once the program obtains selected information from the user, it will use simple math to determine the day of the week in which the user was born, and determine the day of the week their current birthday will be for the current calendar year. The program will also display to the user their current age, along with re-displaying their name back to them.

NOTE: On some compilers, you may have to add #include < cstdlib> in order for the code to compile.





		
		
			When Were You Born?
			
C++
			
			#include <iostream>
#include <string>
using namespace std;

// a const variable containing the current year
const int CURRENT_YEAR = 2012;

// function prototypes
string GetNameOfMonth(int numOfMonth);
int GetLastTwoDigits(int fourDigitYear);
string GetDayOfWeek(int numOfMonth, int lastTwoDigits, int numOfDay, int fourDigitYear);

int main ()
{
	// declare variables
	string nameOfMonth = " ", dayOfWeek = " ", userName = " ", dayOfWeekCurrentYear = " " ;
	int numOfMonth=0, numOfDay=0, fourDigitYear=0, lastTwoDigits=0, lastTwoDigitsCurrentYear;
	
	// user inputs data
	cout << "Please enter your name: ";
	cin >> userName;

	cout << "nPlease enter the month in which you were born (between 1 and 12): ";
	cin >> numOfMonth;

	// converts the number the user inputted from above ^ 
	// into a literal month name (i.e month #1 = January)
	nameOfMonth = GetNameOfMonth(numOfMonth);
	
	// user inputs data
	cout << "nPlease enter the day you were born (between 1 and 31): ";
	cin >> numOfDay;
	
	// checks to see if user entered valid data 
	if (numOfDay < 1 || numOfDay > 31)
	{
		cout << "nYou have entered an invalid number of day. "
			<< "Please enter a valid number." << endl << endl;
		exit(1);
	}
	
	// user inputs data
	cout << "nPlease enter the year you were born (between 1900 and 2099): ";
	cin >>  fourDigitYear;
	cout << endl << endl;
	
	// checks to see if user entered valid data 
	if (fourDigitYear < 1900 || fourDigitYear > 2099)
	{
		cout << "You have entered an invalid year. "
			<< "Please enter a valid year." << endl << endl;
		exit(1);
	}
	
	// gets the las two digits in which the user was born
	// (i.e 1999: last two digits = 99)
	lastTwoDigits = GetLastTwoDigits(fourDigitYear);

	// gets the las two digits of the current year
	// (i.e 2012: last two digits = 12)
	lastTwoDigitsCurrentYear = GetLastTwoDigits(CURRENT_YEAR);

	// finds the day of the week in which the user was born
	dayOfWeek = GetDayOfWeek(numOfMonth, lastTwoDigits, numOfDay, fourDigitYear);

	// finds the day of the week the users current birthday will be this year
	dayOfWeekCurrentYear = GetDayOfWeek(numOfMonth, lastTwoDigitsCurrentYear, numOfDay, CURRENT_YEAR);
	
	// display data to user
	cout << "Hello " << userName <<". Here are some facts about you!" <<endl;
	cout << "You were born "<< nameOfMonth << numOfDay << " "<< fourDigitYear << endl;
	cout << "Your birth took place on a " << dayOfWeek << endl;
	cout << "This year your birthday will take place on a " << dayOfWeekCurrentYear << endl;
	cout << "You currently are, or will be " << (CURRENT_YEAR - fourDigitYear) << " years old this year!"<<endl;
	
	return 0;
}// end of main

	// converts the number the user inputted from above ^ 
	// into a literal month name (i.e month #1 = January)
string GetNameOfMonth(int numOfMonth)
{
	string nameOfMonth = " ";

	// a switch determining what month the user was born
	switch(numOfMonth)
	{
	case 1:
			nameOfMonth = "January ";
			break;
	case 2:
			nameOfMonth = "February ";
			break;
	case 3:
			nameOfMonth = "March ";
			break;
	case 4:
			nameOfMonth = "April ";
			break;
	case 5:
			nameOfMonth = "May ";
			break;
	case 6:
			nameOfMonth = "June ";
			break;
	case 7: 
			nameOfMonth = "July ";
			break;
	case 8:
			nameOfMonth = "August ";
			break;
	case 9:
			nameOfMonth = "September ";
			break;
	case 10:
			nameOfMonth = "October ";
			break;
	case 11:
			nameOfMonth = "November ";
			break;
	case 12:
			nameOfMonth = "December ";
			break;
	default:
			cout << "You have entered an invalid number of month. nPlease enter a valid number.n"
				<< "Program Terminating..";
			exit(1);
			break;
	}// end of switch

	return nameOfMonth ;
}// end of GetNamOfMonth

	// gets the las two digits in which the user was born/current year
int GetLastTwoDigits(int fourDigitYear)
{
	if (fourDigitYear >= 1900 && fourDigitYear <= 1999)
	{ 
		return (fourDigitYear - 1900);
	}
	
	else
	{
		return (fourDigitYear - 2000);
	}
}// end of GetLastTwoDigits

	// finds the day of the week in which the user was born/current year
string GetDayOfWeek(int numOfMonth, int lastTwoDigits, int numOfDay, int fourDigitYear)
{
	string dayOfWeek = " ";
	int Total = 0, valueOfMonth = 0;

	if (numOfMonth == 1)
                valueOfMonth = 1;
	else if (numOfMonth == 2)
                valueOfMonth = 4;
	else if (numOfMonth == 3)
                valueOfMonth = 4;
	else if (numOfMonth == 4)
                valueOfMonth = 0;
	else if (numOfMonth == 5)
                valueOfMonth = 2;
	else if (numOfMonth == 6)
                valueOfMonth = 5;
	else if (numOfMonth == 7)
                valueOfMonth = 0;
	else if (numOfMonth == 8)
                valueOfMonth = 3;
	else if (numOfMonth == 9)
                valueOfMonth = 6;
	else if (numOfMonth == 10)
                valueOfMonth = 1;
	else if (numOfMonth == 11)
                valueOfMonth = 4;
	else if (numOfMonth == 12)
                valueOfMonth = 6;
	else
		cout <<"nError";
	
	Total = lastTwoDigits / 4;
	Total += lastTwoDigits;
	Total += numOfDay;
	Total += valueOfMonth;
	
	// uses the 'Total' variable from above to determine the day 
	// of the week in which you were born
	if ((fourDigitYear > 2000)&&((numOfMonth != 1)&&(numOfMonth != 2))&&(fourDigitYear != 2004))
	{ 
		Total = Total + 6;
	}
	else  if ((fourDigitYear < 2000) && ((numOfMonth == 1) || (numOfMonth == 2)))
	{ 
		Total = Total + 7;
	}
	else if ((fourDigitYear == 2000) && ((numOfMonth == 1) || (numOfMonth == 2)))
	{
		Total = Total -2;
	}
	else if ((fourDigitYear == 2004||fourDigitYear == 2000)&&((numOfMonth != 1)&&(numOfMonth != 2)))
	{
		Total = Total -1;
	}
	else if ((fourDigitYear % 4 == 0) && (fourDigitYear % 100 == lastTwoDigits) && (fourDigitYear % 400 == lastTwoDigits))
	{
		Total = Total-2;
	}
	else if ((fourDigitYear > 2000)&&((numOfMonth == 1)||(numOfMonth == 2))&&(fourDigitYear != 2004))
	{
		Total = Total + 6;
	}

	// uses the 'Total' variable from above to determine the day 
	// of the week in which you were born/when you birthday will be this year
	if (Total % 7 == 1)
                dayOfWeek = "Sunday";
	else if (Total % 7 == 2)
                dayOfWeek = "Monday";
	else if (Total % 7 == 3)
                dayOfWeek = "Tuesday";
	else  if (Total % 7 == 4)
                dayOfWeek = "Wednesday";
	else if (Total % 7 == 5)
                dayOfWeek = "Thursday";
	else if (Total % 7 == 6)
                dayOfWeek = "Friday";
	else if (Total % 7 == 0)
                dayOfWeek = "Saturday";
	else
		cout<< "nError";

	return dayOfWeek;
}// http://programmingnotes.org/
			
				
					
				
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						#include <iostream>
#include <string>
using namespace std;
 
// a const variable containing the current year
const int CURRENT_YEAR = 2012;
 
// function prototypes
string GetNameOfMonth(int numOfMonth);
int GetLastTwoDigits(int fourDigitYear);
string GetDayOfWeek(int numOfMonth, int lastTwoDigits, int numOfDay, int fourDigitYear);
 
int main ()
{
	// declare variables
	string nameOfMonth = " ", dayOfWeek = " ", userName = " ", dayOfWeekCurrentYear = " " ;
	int numOfMonth=0, numOfDay=0, fourDigitYear=0, lastTwoDigits=0, lastTwoDigitsCurrentYear;
	
	// user inputs data
	cout << "Please enter your name: ";
	cin >> userName;
 
	cout << "nPlease enter the month in which you were born (between 1 and 12): ";
	cin >> numOfMonth;
 
	// converts the number the user inputted from above ^ 
	// into a literal month name (i.e month #1 = January)
	nameOfMonth = GetNameOfMonth(numOfMonth);
	
	// user inputs data
	cout << "nPlease enter the day you were born (between 1 and 31): ";
	cin >> numOfDay;
	
	// checks to see if user entered valid data 
	if (numOfDay < 1 || numOfDay > 31)
	{
		cout << "nYou have entered an invalid number of day. "
			<< "Please enter a valid number." << endl << endl;
		exit(1);
	}
	
	// user inputs data
	cout << "nPlease enter the year you were born (between 1900 and 2099): ";
	cin >>  fourDigitYear;
	cout << endl << endl;
	
	// checks to see if user entered valid data 
	if (fourDigitYear < 1900 || fourDigitYear > 2099)
	{
		cout << "You have entered an invalid year. "
			<< "Please enter a valid year." << endl << endl;
		exit(1);
	}
	
	// gets the las two digits in which the user was born
	// (i.e 1999: last two digits = 99)
	lastTwoDigits = GetLastTwoDigits(fourDigitYear);
 
	// gets the las two digits of the current year
	// (i.e 2012: last two digits = 12)
	lastTwoDigitsCurrentYear = GetLastTwoDigits(CURRENT_YEAR);
 
	// finds the day of the week in which the user was born
	dayOfWeek = GetDayOfWeek(numOfMonth, lastTwoDigits, numOfDay, fourDigitYear);
 
	// finds the day of the week the users current birthday will be this year
	dayOfWeekCurrentYear = GetDayOfWeek(numOfMonth, lastTwoDigitsCurrentYear, numOfDay, CURRENT_YEAR);
	
	// display data to user
	cout << "Hello " << userName <<". Here are some facts about you!" <<endl;
	cout << "You were born "<< nameOfMonth << numOfDay << " "<< fourDigitYear << endl;
	cout << "Your birth took place on a " << dayOfWeek << endl;
	cout << "This year your birthday will take place on a " << dayOfWeekCurrentYear << endl;
	cout << "You currently are, or will be " << (CURRENT_YEAR - fourDigitYear) << " years old this year!"<<endl;
	
	return 0;
}// end of main
 
	// converts the number the user inputted from above ^ 
	// into a literal month name (i.e month #1 = January)
string GetNameOfMonth(int numOfMonth)
{
	string nameOfMonth = " ";
 
	// a switch determining what month the user was born
	switch(numOfMonth)
	{
	case 1:
			nameOfMonth = "January ";
			break;
	case 2:
			nameOfMonth = "February ";
			break;
	case 3:
			nameOfMonth = "March ";
			break;
	case 4:
			nameOfMonth = "April ";
			break;
	case 5:
			nameOfMonth = "May ";
			break;
	case 6:
			nameOfMonth = "June ";
			break;
	case 7: 
			nameOfMonth = "July ";
			break;
	case 8:
			nameOfMonth = "August ";
			break;
	case 9:
			nameOfMonth = "September ";
			break;
	case 10:
			nameOfMonth = "October ";
			break;
	case 11:
			nameOfMonth = "November ";
			break;
	case 12:
			nameOfMonth = "December ";
			break;
	default:
			cout << "You have entered an invalid number of month. nPlease enter a valid number.n"
				<< "Program Terminating..";
			exit(1);
			break;
	}// end of switch
 
	return nameOfMonth ;
}// end of GetNamOfMonth
 
	// gets the las two digits in which the user was born/current year
int GetLastTwoDigits(int fourDigitYear)
{
	if (fourDigitYear >= 1900 && fourDigitYear <= 1999)
	{ 
		return (fourDigitYear - 1900);
	}
	
	else
	{
		return (fourDigitYear - 2000);
	}
}// end of GetLastTwoDigits
 
	// finds the day of the week in which the user was born/current year
string GetDayOfWeek(int numOfMonth, int lastTwoDigits, int numOfDay, int fourDigitYear)
{
	string dayOfWeek = " ";
	int Total = 0, valueOfMonth = 0;
 
	if (numOfMonth == 1)
                valueOfMonth = 1;
	else if (numOfMonth == 2)
                valueOfMonth = 4;
	else if (numOfMonth == 3)
                valueOfMonth = 4;
	else if (numOfMonth == 4)
                valueOfMonth = 0;
	else if (numOfMonth == 5)
                valueOfMonth = 2;
	else if (numOfMonth == 6)
                valueOfMonth = 5;
	else if (numOfMonth == 7)
                valueOfMonth = 0;
	else if (numOfMonth == 8)
                valueOfMonth = 3;
	else if (numOfMonth == 9)
                valueOfMonth = 6;
	else if (numOfMonth == 10)
                valueOfMonth = 1;
	else if (numOfMonth == 11)
                valueOfMonth = 4;
	else if (numOfMonth == 12)
                valueOfMonth = 6;
	else
		cout <<"nError";
	
	Total = lastTwoDigits / 4;
	Total += lastTwoDigits;
	Total += numOfDay;
	Total += valueOfMonth;
	
	// uses the 'Total' variable from above to determine the day 
	// of the week in which you were born
	if ((fourDigitYear > 2000)&&((numOfMonth != 1)&&(numOfMonth != 2))&&(fourDigitYear != 2004))
	{ 
		Total = Total + 6;
	}
	else  if ((fourDigitYear < 2000) && ((numOfMonth == 1) || (numOfMonth == 2)))
	{ 
		Total = Total + 7;
	}
	else if ((fourDigitYear == 2000) && ((numOfMonth == 1) || (numOfMonth == 2)))
	{
		Total = Total -2;
	}
	else if ((fourDigitYear == 2004||fourDigitYear == 2000)&&((numOfMonth != 1)&&(numOfMonth != 2)))
	{
		Total = Total -1;
	}
	else if ((fourDigitYear % 4 == 0) && (fourDigitYear % 100 == lastTwoDigits) && (fourDigitYear % 400 == lastTwoDigits))
	{
		Total = Total-2;
	}
	else if ((fourDigitYear > 2000)&&((numOfMonth == 1)||(numOfMonth == 2))&&(fourDigitYear != 2004))
	{
		Total = Total + 6;
	}
 
	// uses the 'Total' variable from above to determine the day 
	// of the week in which you were born/when you birthday will be this year
	if (Total % 7 == 1)
                dayOfWeek = "Sunday";
	else if (Total % 7 == 2)
                dayOfWeek = "Monday";
	else if (Total % 7 == 3)
                dayOfWeek = "Tuesday";
	else  if (Total % 7 == 4)
                dayOfWeek = "Wednesday";
	else if (Total % 7 == 5)
                dayOfWeek = "Thursday";
	else if (Total % 7 == 6)
                dayOfWeek = "Friday";
	else if (Total % 7 == 0)
                dayOfWeek = "Saturday";
	else
		cout<< "nError";
 
	return dayOfWeek;
}// http://programmingnotes.org/

QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

Once compiled, you should get this as your output:
Note: The code was compiled five separate times to display the different outputs its able to produce

Please enter your name: MyProgrammingNotes Please enter the month in which you were born (between 1 and 12): 1 Please enter the day you were born (between 1 and 31): 1 Please enter the year you were born (between 1900 and 2099): 2012
Hello MyProgrammingNotes. Here are some facts about you! You were born January 1 2012 Your birth took place on a Sunday This year your birthday will take place on a Sunday You currently are, or will be 0 years old this year! --------------------------------------------------------------------- Please enter your name: Name Please enter the month in which you were born (between 1 and 12): 4 Please enter the day you were born (between 1 and 31): 2 Please enter the year you were born (between 1900 and 2099): 1957 Hello Name. Here are some facts about you! You were born April 2 1957 Your birth took place on a Tuesday This year your birthday will take place on a Monday You currently are, or will be 55 years old this year! --------------------------------------------------------------------- Please enter your name: Name Please enter the month in which you were born (between 1 and 12): 5 Please enter the day you were born (between 1 and 31): 7 Please enter the year you were born (between 1900 and 2099): 1999 Hello Name. Here are some facts about you! You were born May 7 1999 Your birth took place on a Friday This year your birthday will take place on a Monday You currently are, or will be 13 years old this year! --------------------------------------------------------------------- Please enter your name: Name Please enter the month in which you were born (between 1 and 12): 8 Please enter the day you were born (between 1 and 31): 4 Please enter the year you were born (between 1900 and 2099): 1983 Hello Name. Here are some facts about you! You were born August 4 1983 Your birth took place on a Thursday This year your birthday will take place on a Saturday You currently are, or will be 29 years old this year! --------------------------------------------------------------------- Please enter your name: Name Please enter the month in which you were born (between 1 and 12): 6 Please enter the day you were born (between 1 and 31): 7 Please enter the year you were born (between 1900 and 2099): 2987 You have entered an invalid year. Please enter a valid year. Press any key to continue . . .

C++ || Find The Prime, Perfect & All Known Divisors Of A Number Using A For, While & Do/While Loop

January 11, 2012 admin No comments

This program was designed to better understand how to use different loops which are available in C++.

This program first asks the user to enter a non negative number. After it obtains a non negative integer from the user, the program will determine if the inputted number is a prime number or not, aswell as determine if the user inputted number is a perfect number or not. After it obtains its results, the program will display to the screen if the user inputted number is prime/perfect number or not. The program will also display a list of all the possible divisors of the user inputted number via cout.

REQUIRED KNOWLEDGE FOR THIS PROGRAM

Do/While Loop While Loop For Loop Modulus Basic Math - Prime Numbers Basic Math - Perfect Numbers Basic Math - Divisors





		
		
			Is It Prime or Perfect? List All Possible Divisors
			
C++
			
			#include <iostream>
#include <iomanip>
using namespace std;

int main ()
{
   int userInput = 0;
   int divisor = 0;
   int sumOfDivisors = 0;
   char response ='n';
   
   do{ // this is the start of the do/while loop
	   cout<<"Enter a number: ";
	   cin >> userInput;
	   
	   // if the user inputs a negative number, do this code
	   while(userInput < 0)  
	   {
		   cout<<"ntaSorry, but the number entered is less than the allowable limit. Please try again";
		   cout<<"nnEnter an number: ";
		   cin >> userInput;
	   }
	   
	   cout << "nInput number: " << userInput;

	   // for loop adds sum of all possible divisors
	   for(int counter=1; counter <= userInput; ++counter)
	   {
		   divisor = (userInput % counter);
		   if(divisor == 0)
		   {
			   // this will repeatedly add the found divisors together
			   sumOfDivisors += counter;
		   }
	   }
	   
	   // uses the 'sumOfDivisors' variable from ^ above for loop to 
	   // check if 'userInput' is prime
	   if(userInput == (sumOfDivisors - 1))
	   {
		   cout<<endl;
		   cout << userInput << " is a prime number.";
	   }
	   else
	   {
		   cout<<endl;
		   cout << userInput << " is not a prime number.";
	   }

	   // uses the 'sumOfDivisors' variable from ^ above for loop to 
	   // check if 'userInput' is a perfect number
	   if (userInput == (sumOfDivisors - userInput))
	   {
		   cout<<endl;
		   cout << userInput << " is a perfect number.";
	   }
	   else
	   {
		   cout<<endl;
		   cout << userInput << " is not a perfect number.";
	   }
	   
	   cout << "nDivisors of " << userInput << " are: ";

	   // for loop lists all the possible divisors for the
	   // 'userInput' variable by using the modulus operator
	   for(int counter=1; counter <= userInput; ++counter)
	   {
		   divisor = (userInput % counter);
		   if(divisor == 0 && counter !=userInput)
		   {
			   cout << counter << ", ";
		   }
	   }
	   cout << "and "<< userInput;
	   
	   // asks user if they want to enter new data
	   cout << "nntDo you want to input another number?(Y/N): ";
	   cin >> response;

	   // creates a line seperator if user wants to enter new data
	   cout.fill('-');
	   cout<<left<<setw(30)<<""<<right<<setw(30)<<""<<endl;

	   // resets variable back to zero if the user wants to enter new data
	   sumOfDivisors=0;
   }while(response =='y' || response =='Y');

   // ^ End of the do/while loop. As long as the user chooses
   // 'Y' the loop will keep going.
   // It stops when the user chooses the letter 'N'

   return 0;
}// http://programmingnotes.org/
			
				
					
				
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						#include <iostream>
#include <iomanip>
using namespace std;
 
int main ()
{
   int userInput = 0;
   int divisor = 0;
   int sumOfDivisors = 0;
   char response ='n';
   
   do{ // this is the start of the do/while loop
	   cout<<"Enter a number: ";
	   cin >> userInput;
	   
	   // if the user inputs a negative number, do this code
	   while(userInput < 0)  
	   {
		   cout<<"ntaSorry, but the number entered is less than the allowable limit. Please try again";
		   cout<<"nnEnter an number: ";
		   cin >> userInput;
	   }
	   
	   cout << "nInput number: " << userInput;
 
	   // for loop adds sum of all possible divisors
	   for(int counter=1; counter <= userInput; ++counter)
	   {
		   divisor = (userInput % counter);
		   if(divisor == 0)
		   {
			   // this will repeatedly add the found divisors together
			   sumOfDivisors += counter;
		   }
	   }
	   
	   // uses the 'sumOfDivisors' variable from ^ above for loop to 
	   // check if 'userInput' is prime
	   if(userInput == (sumOfDivisors - 1))
	   {
		   cout<<endl;
		   cout << userInput << " is a prime number.";
	   }
	   else
	   {
		   cout<<endl;
		   cout << userInput << " is not a prime number.";
	   }
 
	   // uses the 'sumOfDivisors' variable from ^ above for loop to 
	   // check if 'userInput' is a perfect number
	   if (userInput == (sumOfDivisors - userInput))
	   {
		   cout<<endl;
		   cout << userInput << " is a perfect number.";
	   }
	   else
	   {
		   cout<<endl;
		   cout << userInput << " is not a perfect number.";
	   }
	   
	   cout << "nDivisors of " << userInput << " are: ";
 
	   // for loop lists all the possible divisors for the
	   // 'userInput' variable by using the modulus operator
	   for(int counter=1; counter <= userInput; ++counter)
	   {
		   divisor = (userInput % counter);
		   if(divisor == 0 && counter !=userInput)
		   {
			   cout << counter << ", ";
		   }
	   }
	   cout << "and "<< userInput;
	   
	   // asks user if they want to enter new data
	   cout << "nntDo you want to input another number?(Y/N): ";
	   cin >> response;
 
	   // creates a line seperator if user wants to enter new data
	   cout.fill('-');
	   cout<<left<<setw(30)<<""<<right<<setw(30)<<""<<endl;
 
	   // resets variable back to zero if the user wants to enter new data
	   sumOfDivisors=0;
   }while(response =='y' || response =='Y');
 
   // ^ End of the do/while loop. As long as the user chooses
   // 'Y' the loop will keep going.
   // It stops when the user chooses the letter 'N'
 
   return 0;
}// http://programmingnotes.org/

QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

Once compiled, you should get this as your output:

Enter a number: 8128
Input number: 8128 8128 is not a prime number. 8128 is a perfect number. Divisors of 8128 are: 1, 2, 4, 8, 16, 32, 64, 127, 254, 508, 1016, 2032, 4064, and 8128 Do you want to input another number?(Y/N): y ------------------------------------------------------------ Enter a number: 6 Input number: 6 6 is not a prime number. 6 is a perfect number. Divisors of 6 are: 1, 2, 3, and 6 Do you want to input another number?(Y/N): y ------------------------------------------------------------ Enter a number: 241 Input number: 241 241 is a prime number. 241 is not a perfect number. Divisors of 241 are: 1, and 241 Do you want to input another number?(Y/N): y ------------------------------------------------------------ Enter a number: 2012 Input number: 2012 2012 is not a prime number. 2012 is not a perfect number. Divisors of 2012 are: 1, 2, 4, 503, 1006, and 2012
Do you want to input another number?(Y/N): n ------------------------------------------------------------ Press any key to continue . . .

C++ || Whats My Name? – Using a Char Array, Strcpy, Strcat, Strcmp, & Strlen

January 10, 2012 admin No comments

Here is another actual homework assignment which was presented in an intro to programming class.

REQUIRED KNOWLEDGE FOR THIS PROGRAM

Character Arrays Functions Strcpy Strcat Strcmp Strlen

This program first prompts the user to enter their name. Upon receiving that information, the program saves input into a character array of size 15. The program then asks if the user has a middle name. If they do, the user will enter a middle name. If they dont, the program proceeds to ask for a last name. Upon receiving the first, [middle], and last names, the program will use strcpy and strcat to copy/append the first, [middle], and last names into a completely new char array titled “fullname.” Lastly, if the users’ first, [middle], or last names are the same, the program will display that data to the screen via cout. The program will also display to the user the number of characters their full name contains using strlen.

NOTE: On some compilers, you may have to add #include < cstring> in order for the code to compile.





		
		
			NameString.cpp
			
C++
			
			// ============================================================================
// File: NameString.cpp
// ============================================================================
//
// Description:
// This program prompts the user for a first name, middle name and last name.
// Each name string is to be saved in its own character array. Then a
// "full name" string is created by copying the first name to a fourth array,
// and concatenating the middle and last names. Once the full name is
// in its own buffer, the total number of characters in the full name will
// be displayed.
//
// ============================================================================
#include <iostream>
using namespace std;

//function prototypes
void FirstMiddleLast(char firstname[]);
void FirstLast(char firstname[]);

// ==== main ==================================================================
//
// ============================================================================
int main()
{
   char firstname[15]; // char array with ability to hold 15 characters
   char response = ' ';

   // get data from user. Notice, you dont need a loop to input data
   // into the char array
   cout << "Please enter your first name: ";
   cin >> firstname;

   // check to see if user has a middle name
   cout << "nDo you have a middle name?(Y/N): ";
   cin >> response;

   // you could also use a switch statement here
   if ((response=='y')||(response=='Y'))
   {
      FirstMiddleLast(firstname); // function declaration
   }
   else if  ((response=='n')||(response=='N'))
   {
      FirstLast(firstname); // function declaration
   }
   else 
   {
      cout << "nPlease press either 'Y' or 'N'nna"
		  << "Program exiting...n";
   }
   
   return 0;
}// end of main

// ==== FirstMiddleLast =======================================================
//
// This function will take as input the first name, and prompt the user for 
// their middle and last name. Then it will display the total number of 
// characters in their name
//
// Input:
//      limit [IN]  -- The users first name
//
// Output:
//      The users full name, and the total number of characters in their name
//
// ============================================================================
void FirstMiddleLast(char firstname[])
{
   char middlename[15];
   char lastname[15];
   char fullname[30];

   cout << "nPlease enter your middle name: ";
   cin >> middlename;
   
   cout <<"nPlease enter your last name: ";
   cin >> lastname;
   
   strcpy(fullname, firstname); // copies data from 'firstname' into 'fullname' array
   strcat(fullname, " "); // appends 'fullname' with a space
   strcat(fullname, middlename); // appends 'fullname' to contain the data from 'middlename' array
   strcat(fullname, " "); // appends 'fullname' with a space
   strcat(fullname, lastname); // appends 'fullname' to contain the data from 'lastname' array

   cout <<"ntYour full name is " << fullname << endl;
   cout << "tThe total number of characters in your name is: ";
   cout << strlen(fullname)-2 << endl; // gets total num of chars contained in the 'fullname' array, minus the 2 spaces
   
   // if strcmp returns 0, the two strings are the same
   if(strcmp(firstname, middlename) == 0)
   {
      cout << "tYour first and middle name are the samen";
   }
   if(strcmp(middlename, lastname) == 0)
   {
      cout << "tYour middle and last name are the samen";
   }
   if(strcmp(firstname, lastname) == 0)
   {
      cout << "tYour first and last name are the samen";
   }
}//   end of FirstMiddleLast

// ==== FirstLast =============================================================
//
// This function will take as input the first name, and prompt the user for 
// their last name. Then it will display the total number of characters in
// their name
//
// Input:
//      limit [IN]  -- The users first name
//
// Output:
//      The users full name, and the total number of characters in their name
//
// ============================================================================
void FirstLast(char firstname[])
{
   char lastname[15];
   char fullname[30];
   
   cout <<"nPlease enter your last name: ";
   cin >> lastname;
   
   strcpy(fullname, firstname); // copies data from 'firstname' into 'fullname' array
   strcat(fullname, " "); // appends 'fullname' with a space
   strcat(fullname, lastname); // appends 'fullname' to contain the data from 'lastname' array

   cout <<"ntYour full name is " << fullname << endl;
   cout << "tThe total number of characters in your name is: ";
   cout << strlen(fullname)-1 << endl; // gets total num of chars contained in the 'fullname' array, minus the single space
   
   // if strcmp returns 0, the two strings are the same
   if(strcmp(firstname, lastname) == 0)
   {
      cout << "tYour first and last name are the samenn";
   }
}//  http://programmingnotes.org/
			
				
					
				
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						// ============================================================================
// File: NameString.cpp
// ============================================================================
//
// Description:
// This program prompts the user for a first name, middle name and last name.
// Each name string is to be saved in its own character array. Then a
// "full name" string is created by copying the first name to a fourth array,
// and concatenating the middle and last names. Once the full name is
// in its own buffer, the total number of characters in the full name will
// be displayed.
//
// ============================================================================
#include <iostream>
using namespace std;
 
//function prototypes
void FirstMiddleLast(char firstname[]);
void FirstLast(char firstname[]);
 
// ==== main ==================================================================
//
// ============================================================================
int main()
{
   char firstname[15]; // char array with ability to hold 15 characters
   char response = ' ';
 
   // get data from user. Notice, you dont need a loop to input data
   // into the char array
   cout << "Please enter your first name: ";
   cin >> firstname;
 
   // check to see if user has a middle name
   cout << "nDo you have a middle name?(Y/N): ";
   cin >> response;
 
   // you could also use a switch statement here
   if ((response=='y')||(response=='Y'))
   {
      FirstMiddleLast(firstname); // function declaration
   }
   else if  ((response=='n')||(response=='N'))
   {
      FirstLast(firstname); // function declaration
   }
   else 
   {
      cout << "nPlease press either 'Y' or 'N'nna"
		  << "Program exiting...n";
   }
   
   return 0;
}// end of main
 
// ==== FirstMiddleLast =======================================================
//
// This function will take as input the first name, and prompt the user for 
// their middle and last name. Then it will display the total number of 
// characters in their name
//
// Input:
//      limit [IN]  -- The users first name
//
// Output:
//      The users full name, and the total number of characters in their name
//
// ============================================================================
void FirstMiddleLast(char firstname[])
{
   char middlename[15];
   char lastname[15];
   char fullname[30];
 
   cout << "nPlease enter your middle name: ";
   cin >> middlename;
   
   cout <<"nPlease enter your last name: ";
   cin >> lastname;
   
   strcpy(fullname, firstname); // copies data from 'firstname' into 'fullname' array
   strcat(fullname, " "); // appends 'fullname' with a space
   strcat(fullname, middlename); // appends 'fullname' to contain the data from 'middlename' array
   strcat(fullname, " "); // appends 'fullname' with a space
   strcat(fullname, lastname); // appends 'fullname' to contain the data from 'lastname' array
 
   cout <<"ntYour full name is " << fullname << endl;
   cout << "tThe total number of characters in your name is: ";
   cout << strlen(fullname)-2 << endl; // gets total num of chars contained in the 'fullname' array, minus the 2 spaces
   
   // if strcmp returns 0, the two strings are the same
   if(strcmp(firstname, middlename) == 0)
   {
      cout << "tYour first and middle name are the samen";
   }
   if(strcmp(middlename, lastname) == 0)
   {
      cout << "tYour middle and last name are the samen";
   }
   if(strcmp(firstname, lastname) == 0)
   {
      cout << "tYour first and last name are the samen";
   }
}//   end of FirstMiddleLast
 
// ==== FirstLast =============================================================
//
// This function will take as input the first name, and prompt the user for 
// their last name. Then it will display the total number of characters in
// their name
//
// Input:
//      limit [IN]  -- The users first name
//
// Output:
//      The users full name, and the total number of characters in their name
//
// ============================================================================
void FirstLast(char firstname[])
{
   char lastname[15];
   char fullname[30];
   
   cout <<"nPlease enter your last name: ";
   cin >> lastname;
   
   strcpy(fullname, firstname); // copies data from 'firstname' into 'fullname' array
   strcat(fullname, " "); // appends 'fullname' with a space
   strcat(fullname, lastname); // appends 'fullname' to contain the data from 'lastname' array
 
   cout <<"ntYour full name is " << fullname << endl;
   cout << "tThe total number of characters in your name is: ";
   cout << strlen(fullname)-1 << endl; // gets total num of chars contained in the 'fullname' array, minus the single space
   
   // if strcmp returns 0, the two strings are the same
   if(strcmp(firstname, lastname) == 0)
   {
      cout << "tYour first and last name are the samenn";
   }
}//  http://programmingnotes.org/

QUICK NOTES:
The highlighted lines are sections of interest to look out for.

CHAR ARRAY
Unlike integer arrays, a loop is not necessary in order to input data into a char array. This is highlighted on lines 32, 76, 79, and 125.

FUNCTIONS
Notice lines 18, 19, 69 and 119. When dealing with arrays, in order to pass variables to different functions, you need to include brackets[] letting the compiler know that you are passing an array variable. If you do not declare the functions as so, you will get a compiler error.

STRCPY/STRCAT
These functions are highlighted on lines 81-85, and 127-129. Read the comments within the code on those selected lines, they are helpful.

STRCMP
This compares two strings together to determine if they are the same. This is displayed on lines 92, 96, 100, and 136 when comparing the first, [middle], and last names together for sameness.

STRLEN
This finds the length of the current string, as noted on lines 89 and 133.

Once compiled, you should get this as your output:
Note: The code was compiled five separate times to display the different outputs its able to produce

Please enter your first name: My Do you have a middle name?(Y/N): y Please enter your middle name: Programming Please enter your last name: Notes
Your full name is My Programming Notes The total number of characters in your name is: 18 ----------------------------------------------------------------------- Please enter your first name: Programming Do you have a middle name?(Y/N): N Please enter your last name: Notes Your full name is Programming Notes The total number of characters in your name is: 16 ----------------------------------------------------------------------- Please enter your first name: Notes Do you have a middle name?(Y/N): y Please enter your middle name: Notes Please enter your last name: Notes Your full name is Notes Notes Notes The total number of characters in your name is: 15 Your first and middle name are the same Your middle and last name are the same Your first and last name are the same ----------------------------------------------------------------------- Please enter your first name: My Do you have a middle name?(Y/N): N Please enter your last name: My Your full name is My My The total number of characters in your name is: 4 Your first and last name are the same ----------------------------------------------------------------------- Please enter your first name: My Do you have a middle name?(Y/N): z
Please press either 'Y' or 'N' Program exiting...

Tag Archives: name

C++ || Input/Output – Using An Array, Sort Names From a Text File & Save The Sorted Names To A New Text File

C++ || Find The Day Of The Week You Were Born Using Functions, String, Modulus, If/Else, & Switch

C++ || Find The Prime, Perfect & All Known Divisors Of A Number Using A For, While & Do/While Loop

C++ || Whats My Name? – Using a Char Array, Strcpy, Strcat, Strcmp, & Strlen

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