Strings and string functions In C

What is String in C ?

String is a collection of characters. There are two ways to declare string in c language.

1. By char array

2. By string literal

• Header file

#include<string.h> // used to perform string functions

• Declaring string by char array

char c[4]={'g','o','o','d'};

 

• Declaring string by string literal

char c[]="morning";

Example 

[php]#include <stdio.h>
#include <conio.h>
void main ()
{
char c1[11]={‘g’,’o’,’o’,d’};
char c2[]="morning";
printf("Char Array Value : %s\n", c1);
printf("String Literal Value : %s\n", c2);
getch();
}[/php]

Output

[code]Char Array Value: good  Literal Value is: morning[/code]

String Functions

No.	Function	Description
1)	strlen(string_name)	Returns the length of string name.
2)	strcpy(destination, source)	Copies the contents of source string to destination string.
3)	strcat(first_string, second_string)	Concats or joins first string with second string. The result of the string is stored in first string.
4)	strcmp(first_string, second_string)	Compares the first string with second string. If both strings are same, it returns 0.