Operating Systems 2 1.D

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

void nothing(){
  int x=0;
  x=x+1;
}

int main(){
  int i=1;
  int start=time(NULL);
  printf("Αρχική τιμή δευτερολέπτων %d\n", start);

  while(i<=100){
    if(fork()==0){
      //printf("I am %d child: %d and my parent is %d\n",i, getpid(),getppid());
      nothing();
      exit(0);
    }
    i++;
  }
  for (i=1;i<=100;i++){
    waitpid((pid_t)-1,NULL,0); //could do wait here instead?
  }
  int end=time(NULL);
  printf("Τελική τιμή δευτερολέπτων %d\n", end);
  printf("Diafora xronou %d\nMesos xronos %d\n", end-start,(end-start)/100);
  return 0;
}