child.c

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

int main(void) {
	pid_t proc1 = fork();
	pid_t proc2 = fork();

	if(proc1 < 0 || proc2 < 0) {
		perror("Forking failed");
	}

	if(proc1 == 0) {
		printf("I am the first child proccess: %d\n", (int) getpid());
	}
	if(proc2 == 0) {
		printf("I am the second child process: %d\n", (int) getpid());
	}
	if(getpid() > 0) {
		printf("I am the parent process: %d\n", (int) getpid());
		printf("Parent is waiting for children to die...");
	}
	sleep(5);
	wait(NULL);
	printf("\nChildren are now dead!\n");
	exit(0);
	return 0;
}