The strlen function is used to determine the length of a string. The strcpy function is used to copy one string to another. The standard string.h library contains many useful functions to manipulate strings. Some of the most useful functions have been exampled here.

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Some Common String Functions

The standard string.h library contains many useful functions to manipulate strings. Some of the most useful functions have been exampled here.

The strlen Function

The strlen function is used to determine the length of a string. Let us learn the use of strlen with example:

#include <stdio.h>
#include <string.h>
int main()
{
char name[80];
int length;

printf("Enter your name: ");
gets(name);

length = strlen(name);

printf("Your name has %d characters\n", length);
return 0;
}

And the execution of the program will be as follows:

Enter your name: Tarun Subhash Tyagi
Your name has 19 characters

Enter your name: Preeti Tarun
Your name has 12 characters

The strcpy Function

The strcpy function is used to copy one string to another. Let us learn the use of this function with example:

#include <stdio.h>
#include <string.h>

int main()
{
char first[80];
char second[80];

printf("Enter first string: ");
gets(first);

printf("Enter second string: ");
gets(second);

printf("first: %s, and second: %s Before strcpy()\n " , first, second);

strcpy(second, first);

printf("first: %s, and second: %s After strcpy()\n", first, second);
return 0;
}

and the output of the program will be as:

Enter first string: Tarun
Enter second string: Tyagi
first: Tarun, and second: Tyagi Before strcpy()
first: Tarun, and second: Tarun After strcpy()

 

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Data Recovery with & without Programming


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