strcat

 

C

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Defined in header <string.h>
char *strcat( char          *dest, const char          *src );		(until C99)
char *strcat( char *restrict dest, const char *restrict src );		(since C99)

Appends a byte string pointed to by src to a byte string pointed to by dest. The resulting byte string is null-terminated.

The destination byte string must be large enough for the contents of both str and dest and the terminating null character.

The behavior is undefined if the strings overlap.

Parameters

dest	-	pointer to the null-terminated byte string to append to
src	-	pointer to the null-terminated byte string to copy from

Return value

dest

Example

Run this code

#include <string.h> 
#include <stdio.h>
 
int main(void) 
{
    char str[50] = "Hello ";
    char str2[50] = "World!";
    strcat(str, str2);
    strcat(str, " ...");
    strcat(str, " Goodbye World!");
    puts(str);
}

Output:

Hello World! ... Goodbye World!

See also

strncat	concatenates a certain amount of characters of two strings (function)
strcpy	copies one string to another (function)
C++ documentation for strcat