C++ || Char Array – Convert Text Contained In A Character Array From Lower To UPPERCASE

February 25, 2012 admin No comments

This program demonstrates how to switch text which is contained in a char array from lower to UPPERCASE. This program also demonstrates how to convert all of the text contained in a char array to lower/UPPERCASE.

REQUIRED KNOWLEDGE FOR THIS PROGRAM

Character Arrays Cin.getline Islower Isupper Tolower Toupper Strlen While Loops For Loops Constant Variables Setw

Using a constant integer value, this program first asks the user to enter in 3 lines of text they wish to convert from lower to UPPERCASE. Upon obtaining the information from the user, the program then converts all the text which was placed into the character array from lower to uppercase in the following order:

(1) Switches the text from lower to UPPERCASE (2) Converts all the text to UPPERCASE (3) Converts all the text to lowercase

After each conversion is complete, the program displays the updated information to the screen via cout.

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





		
		
			Convert Text From Lower To UPPERCASE
			
C++
			
			#include <iostream>
#include <iomanip>
using namespace std;

// constant value
const int NUM_NAMES = 3;

// function prototype
void ConvertLowerToUpper(char names[][30]);
void ConvertAllToUpper(char names[][30]);
void ConvertAllToLower(char names[][30]);

int main()
{
	// declare variable
	// this is a 2-D char array, which by default, has 
	// the ability to hold 3 names, each 30 characters long
	char names[NUM_NAMES][30];

	// get data from user
	cout << "Please enter "<<NUM_NAMES<<" line(s) of text you wish to convert from lower to UPPERCASE:nt";
	for(int index=0; index < NUM_NAMES; ++index)
	{
		cout<<"#"<< index+1 <<": ";
		cin.getline(names[index],30);
		cout<< "t";
	}

	// create a line seperator
	cout<<endl;
	cout.fill('-');
	cout<<left<<setw(30)<<""<<right<<setw(30)<<""<<endl; 

	// re-display the input to the screen
	cout << "nThis is what you entered into the system:nt";
	for(int index=0; index < NUM_NAMES; ++index)
	{
		cout<<"Text #"<< index+1 <<": "<<names[index]<<endl;
		cout<< "t";
	}
	
	// create a line seperator
	cout<<endl;
	cout.fill('-');
	cout<<left<<setw(30)<<""<<right<<setw(30)<<""<<endl; 

	// display the switched lower to UPPERCASE text to the user
	cout << "nThis is the information switched from lower to UPPERCASE:nt";
	
	// function declaration
	ConvertLowerToUpper(names);

	for(int index=0; index < NUM_NAMES; ++index)
	{
		cout<<"Text #"<< index+1 <<": "<<names[index]<<endl;
		cout<< "t";
	}

	// create a line seperator
	cout<<endl;
	cout.fill('-');
	cout<<left<<setw(30)<<""<<right<<setw(30)<<""<<endl; 

	// display the 'all UPPERCASE' converted text to the user
	cout << "nThis is the information converted to all UPPERCASE:nt";
	
	// function declaration
	ConvertAllToUpper(names);

	for(int index=0; index < NUM_NAMES; ++index)
	{
		cout<<"Text #"<< index+1 <<": "<<names[index]<<endl;
		cout<< "t";
	}

	// create a line seperator
	cout<<endl;
	cout.fill('-');
	cout<<left<<setw(30)<<""<<right<<setw(30)<<""<<endl; 

	// display the 'all lowercase' converted text to the user
	cout << "nThis is the information converted to all lowercase:nt";
	
	// function declaration
	ConvertAllToLower(names);

	for(int index=0; index < NUM_NAMES; ++index)
	{
		cout<<"Text #"<< index+1 <<": "<<names[index]<<endl;
		cout<< "t";
	}

	return 0;
}// end of main

void ConvertLowerToUpper(char names[][30])
{
	int index=0;

	// increment thru the current char array index
	while(index < NUM_NAMES)
	{
		// increment thru each letter within the current char array index
		for(int currentChar=0;  currentChar < strlen(names[index]); ++currentChar)
		{
			// checks each letter in the current array index
			// to see if its lower or UPPERCASE
			// if its lowercase, change to UPPERCASE
			if (islower(names[index][currentChar]))
			{
				names[index][currentChar] = toupper(names[index][currentChar]);
			}
			else  // if its UPPERCASE, change to lowercase
			{
				names[index][currentChar] = tolower(names[index][currentChar]);
			}
		}
		++index;
	}
}// end of ConvertLowerToUpper

void ConvertAllToUpper(char names[][30])
{
	int index=0;

	// increment thru the current char array index
	while(index < NUM_NAMES)
	{
		// increment thru each letter within the current char array index
		for(int currentChar=0;  currentChar < strlen(names[index]); ++currentChar)
		{
			// checks each letter in the current array index
			// to see if its lower or UPPERCASE
			// if its lowercase, change to UPPERCASE
			if (islower(names[index][currentChar]))
			{
				names[index][currentChar] = toupper(names[index][currentChar]);
			}
		}
		++index;
	}
}// end of ConvertAllToUpper

void ConvertAllToLower(char names[][30])
{
	int index=0;

	// increment thru the current char array index
	while(index < NUM_NAMES)
	{
		// increment thru each letter within the current char array index
		for(int currentChar=0;  currentChar < strlen(names[index]); ++currentChar)
		{
			// checks each letter in the current array index
			// to see if its lower or UPPERCASE
			// if its UPPERCASE, change to lowercase
			if (isupper(names[index][currentChar]))
			{
				names[index][currentChar] = tolower(names[index][currentChar]);
			}
		}
		++index;
	}
}// http://programmingnotes.org/ 
			
				
					
				
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						#include <iostream>
#include <iomanip>
using namespace std;
 
// constant value
const int NUM_NAMES = 3;
 
// function prototype
void ConvertLowerToUpper(char names[][30]);
void ConvertAllToUpper(char names[][30]);
void ConvertAllToLower(char names[][30]);
 
int main()
{
	// declare variable
	// this is a 2-D char array, which by default, has 
	// the ability to hold 3 names, each 30 characters long
	char names[NUM_NAMES][30];
 
	// get data from user
	cout << "Please enter "<<NUM_NAMES<<" line(s) of text you wish to convert from lower to UPPERCASE:nt";
	for(int index=0; index < NUM_NAMES; ++index)
	{
		cout<<"#"<< index+1 <<": ";
		cin.getline(names[index],30);
		cout<< "t";
	}
 
	// create a line seperator
	cout<<endl;
	cout.fill('-');
	cout<<left<<setw(30)<<""<<right<<setw(30)<<""<<endl; 
 
	// re-display the input to the screen
	cout << "nThis is what you entered into the system:nt";
	for(int index=0; index < NUM_NAMES; ++index)
	{
		cout<<"Text #"<< index+1 <<": "<<names[index]<<endl;
		cout<< "t";
	}
	
	// create a line seperator
	cout<<endl;
	cout.fill('-');
	cout<<left<<setw(30)<<""<<right<<setw(30)<<""<<endl; 
 
	// display the switched lower to UPPERCASE text to the user
	cout << "nThis is the information switched from lower to UPPERCASE:nt";
	
	// function declaration
	ConvertLowerToUpper(names);
 
	for(int index=0; index < NUM_NAMES; ++index)
	{
		cout<<"Text #"<< index+1 <<": "<<names[index]<<endl;
		cout<< "t";
	}
 
	// create a line seperator
	cout<<endl;
	cout.fill('-');
	cout<<left<<setw(30)<<""<<right<<setw(30)<<""<<endl; 
 
	// display the 'all UPPERCASE' converted text to the user
	cout << "nThis is the information converted to all UPPERCASE:nt";
	
	// function declaration
	ConvertAllToUpper(names);
 
	for(int index=0; index < NUM_NAMES; ++index)
	{
		cout<<"Text #"<< index+1 <<": "<<names[index]<<endl;
		cout<< "t";
	}
 
	// create a line seperator
	cout<<endl;
	cout.fill('-');
	cout<<left<<setw(30)<<""<<right<<setw(30)<<""<<endl; 
 
	// display the 'all lowercase' converted text to the user
	cout << "nThis is the information converted to all lowercase:nt";
	
	// function declaration
	ConvertAllToLower(names);
 
	for(int index=0; index < NUM_NAMES; ++index)
	{
		cout<<"Text #"<< index+1 <<": "<<names[index]<<endl;
		cout<< "t";
	}
 
	return 0;
}// end of main
 
void ConvertLowerToUpper(char names[][30])
{
	int index=0;
 
	// increment thru the current char array index
	while(index < NUM_NAMES)
	{
		// increment thru each letter within the current char array index
		for(int currentChar=0;  currentChar < strlen(names[index]); ++currentChar)
		{
			// checks each letter in the current array index
			// to see if its lower or UPPERCASE
			// if its lowercase, change to UPPERCASE
			if (islower(names[index][currentChar]))
			{
				names[index][currentChar] = toupper(names[index][currentChar]);
			}
			else  // if its UPPERCASE, change to lowercase
			{
				names[index][currentChar] = tolower(names[index][currentChar]);
			}
		}
		++index;
	}
}// end of ConvertLowerToUpper
 
void ConvertAllToUpper(char names[][30])
{
	int index=0;
 
	// increment thru the current char array index
	while(index < NUM_NAMES)
	{
		// increment thru each letter within the current char array index
		for(int currentChar=0;  currentChar < strlen(names[index]); ++currentChar)
		{
			// checks each letter in the current array index
			// to see if its lower or UPPERCASE
			// if its lowercase, change to UPPERCASE
			if (islower(names[index][currentChar]))
			{
				names[index][currentChar] = toupper(names[index][currentChar]);
			}
		}
		++index;
	}
}// end of ConvertAllToUpper
 
void ConvertAllToLower(char names[][30])
{
	int index=0;
 
	// increment thru the current char array index
	while(index < NUM_NAMES)
	{
		// increment thru each letter within the current char array index
		for(int currentChar=0;  currentChar < strlen(names[index]); ++currentChar)
		{
			// checks each letter in the current array index
			// to see if its lower or UPPERCASE
			// if its UPPERCASE, change to lowercase
			if (isupper(names[index][currentChar]))
			{
				names[index][currentChar] = tolower(names[index][currentChar]);
			}
		}
		++index;
	}
}// http://programmingnotes.org/

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

Click here to see how cin.getline works.

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

Please enter 3 line(s) of text you wish to convert from lower to UPPERCASE: #1: I StriKe hiM a heAVy bloW. #2: When cAn the neRve ShinE? #3: My Programming Notes.
------------------------------------------------------------ This is what you entered into the system: Text #1: I StriKe hiM a heAVy bloW. Text #2: When cAn the neRve ShinE? Text #3: My Programming Notes. ------------------------------------------------------------ This is the information switched from lower to UPPERCASE: Text #1: i sTRIkE HIm A HEavY BLOw. Text #2: wHEN CaN THE NErVE sHINe? Text #3: mY pROGRAMMING nOTES. ------------------------------------------------------------ This is the information converted to all UPPERCASE: Text #1: I STRIKE HIM A HEAVY BLOW. Text #2: WHEN CAN THE NERVE SHINE? Text #3: MY PROGRAMMING NOTES.
------------------------------------------------------------ This is the information converted to all lowercase: Text #1: i strike him a heavy blow. Text #2: when can the nerve shine? Text #3: my programming notes.

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Posted in: Basic, C++ Tags: array, c++, char, const, for loop, functions, Sentence, switch, Text, UPPERCASE, While Loop

C++ || Char Array – Convert Text Contained In A Character Array From Lower To UPPERCASE

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