#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/wait.h>

int main(int argc, char *argv[]) {

    if(argc != 2) {

        perror("Please provide exactly one argument");

        exit(1);

    }

    int n = atoi(argv[1]);

    for(int i = 0; i < n; i++) {

        int f = fork();

        if(-1 == f) {

            perror("Error on fork");

        } else if(0 == f) {

            printf("Child process %d - PID: %d - PPID: %d\n", i, getpid(), getppid());

        } else {

            printf("Parent %d - Child: %d\n", getpid(), f);

            wait(0);

            exit(0);

        }

    }

    return 0;

}