#include <iostream>
#include <unistd.h>      // wait, getpid, fork
#include <string.h>      //strcmp
#include <sys/wait.h>    //wait
#include <sys/types.h>   //getpid

using namespace std;

void SleepChild(int number) {
    int sleepTime;
    int exitStatus;

    srand(getpid());
    sleepTime = rand() % 7+1;
    cout << "\tChild  " << number << " going to sleep  for "
         << sleepTime << " sec" << endl;
    sleep(sleepTime);
    exitStatus = 1+rand()%255;
    cout <<"\tChild  " << number << " is exiting with value "
         << exitStatus << endl;

    exit(exitStatus);
}


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

    pid_t childPID;
    int procCount =1;

    int i = 1;
    while (i < argc) {
       if (0 == strcmp("-p",argv[i]) and argv[i+1] != NULL) {
           procCount = atoi(argv[i+1]);
	   i+= 2;
       } else {
          cout << "error " << argv[i] << endl;
	  i++;
       }
    }

    procCount = max(procCount,1);
    procCount = min(procCount,10);

    for(i=0;i<procCount ; i++) {
        childPID = fork();
        if (childPID == 0) {
	   SleepChild(i);
        }
    }

    i = 0;
    long bigCount = 0;
    cout << "Parent waiting  and working " << endl;
    while ( i < procCount) {
        // any children exited yet?
        childPID = waitpid(0,&status,WNOHANG);

	if (childPID !=0) {
            cout << "Process " << childPID << " exited, this was number "
	         << i << endl; 
            cout << "\t\tThe parent has counted to " << bigCount << endl;

            if (WIFEXITED(status)) {
               cout << "The exit status was " << WEXITSTATUS(status) << endl;
            } 
            i++;
	}

	bigCount ++;

    }

    cout << "\t\tFinal Parent Count: " << bigCount << endl;
    return 0;
}