strcat( ) in C programming language

This function concatenates the source string at the end of the target string. For example, “Bombay” and “Nagpur” on concatenation would result into a string “BombayNagpur”. Here is an example of strcat( ) at work.

main( )
{
char source[ ] = "Folks!" ;
char target[30] = "Hello" ;
strcat ( target, source ) ;
printf ( "\nsource string = %s", source ) ;
printf ( "\ntarget string = %s", target ) ;
}
And here is the output...
source string = Folks!
target string = HelloFolks!

Note that the target string has been made big enough to hold the final string. I leave it to you to develop your own xstrcat( ) on lines of xstrlen( ) and xstrcpy( ).