Programming

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

void catch(int);

int main (void) {

pid_t pid;
pid = fork();

if (!pid){                    
    signal(SIGALRM,catch);
    pause();
     
} else{                
       kill(pid,SIGALRM);
       printf("start the father\n");
  }
}

void catch(int signo) {
	printf("start the child");
}

if (!pid){
    signal(SIGALRM,catch);
    pause();

} else{
       sleep(1); /* let the child have the chance to execute before the parent */
       kill(pid,SIGALRM);
       printf("start the father\n");
  }