Program to catch Ctrl+C.

/*
 * A small program that catches the ctrl-c(SIGINT) signal for the first time and prints
 * a output rather but exits on pressing ctrl-c again
 */

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <signal.h>

void sigfun(int sig)
{
        printf("You have presses Ctrl-C , please press again to exit");
    (void) signal(SIGINT, SIG_DFL);
}

int main()
{
        (void) signal(SIGINT, sigfun);
  
    while(1) {
      printf("Hello World!
");
      sleep(1);
    }

    return(0);
}