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

int main ()
{
    pid_t pid ;
    printf("Parent process is running and about to fork to a child process\n") ;

    pid = fork() ;

    if (pid<0)
    {
        fprintf(stderr, "Fork failed") ;
        return 1 ;
    }
    else if (pid==0)
    {
        printf("I am the child process\n") ;
        exit(0) ;
    }

    else
    {
        wait(NULL) ;
        printf("Parent acknowledges child termination Parent will terminate now\n") ;
    }

    return 0 ;
}


Output with "gcc Asg3iia.c -o Asg3iia.out && ./Asg3iia.out" :

Parent process is running and about to fork to a child process
I am the child process
Parent acknowledges child termination Parent will terminate now

Output with "gcc Asg3iia.c -o Asg3iia.out && ./Asg3iia.out | less" :

Parent process is running and about to fork to a child process
I am the child process
Parent process is running and about to fork to a child process
Parent acknowledges child termination Parent will terminate now