Lab Quiz

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

int main() {
    pid_t pid1, pid2, pid3, pid4;

    printf("Parent PID: %d\n", getpid());

    pid1 = fork();

    if (pid1 == 0) {
        printf("Child 1 PID: %d, Parent PID: %d\n", getpid(), getppid());

        pid2 = fork();

        if (pid2 == 0) {
            printf("Child 2 PID: %d, Parent PID: %d\n", getpid(), getppid());
        }
        else {
            pid3 = fork();

            if (pid3 == 0) {
                printf("Child 3 PID: %d, Parent PID: %d\n", getpid(), getppid());
            }
            else {
                pid4 = fork();

                if (pid4 == 0) {
                    printf("Child 4 PID: %d, Parent PID: %d\n", getpid(), getppid());
                }
                else {
                    wait(0);
                }
            }
        }
    }
    return 0;
}