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

using namespace std;

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

    pid_t pid, wpid;
    int status;

    pid = fork();

    if (!pid) {
       // child

       cout << "I am the child and my pid is " << getpid()  << endl;
       sleep(2);
       return atoi(argv[1]);
    }

    wpid = wait(&status);
    if(wpid == -1) {
       perror("Wait");
    } else if (wpid != pid) {
       cout << "Strage things have happened " << endl;
    } else {
      if(WIFEXITED(status) ) {
         cout << "The child exited with status " << WEXITSTATUS(status) << endl;
      } else if (WIFSIGNALED(status)) {
         cout << "The child exited wit a singal " << WTERMSIG(status) << endl;
      } else if (WIFSTOPPED(status)) {
         cout << "The child was stopped " << endl;
      } else if (WIFCONTINUED(status)) {
         cout << "The child was continued " << endl;
      }
      
    }
    return 0;

}