friday

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

#define COUNT 4

int main(void) {


    int count = COUNT, children = 0;


    pid_t retpid = 1;



    while (count-- > 0 && retpid > 0)


        if ((retpid = fork()) > 0)
            children++;



    if (retpid != 0) {
        printf("Parent PID %d\n", getpid());



        while (children-- > 0)
            wait(NULL);
    } else {


        printf("Child PID %d, PPID %d\n", getpid(), getppid());
    }

    sleep(90);
}