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/
			
				
					
				
					1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
				
						// ============================================================================
// 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...

Was this article helpful?

👍 YesNo

Posted in: Basic, C++ Tags: array, c++, name, Sentence, strcmp

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

Related

Leave a ReplyCancel reply

Search

Compile Your Code Now

Translate Page

Popular Pages

Recent

Archives

Categories