//-------------------------------------------------------------------
//	children.cpp
//
//	This program forks a number of separate child-processes and
//	provides to each of them a 4-digit string of random decimal 
//	numerals.  Each child-process executes our 'showarg1' using
//	the string of random numerals as a command-line argument.
//
//		compile using:  $ make showarg1
//				$ make children
//		execute using:  $ children
//
//	This is an initial 'prototype' for one possible solution to 
//	our suggested in-class exercise (on lottery and gamblers).
//
//	programmer: ALLAN CRUSE
//	written on: 13 OCT 2004
//-------------------------------------------------------------------

#include <stdio.h>	// for printf(), perror() 
#include <stdlib.h>	// for exit() 
#include <unistd.h>	// for fork()
#include <sys/wait.h>	// for wait()

#define N_TASKS 8 	// number of separate child-processes 

int main( int argc, char **argv )
{
	for (int i = 0; i < N_TASKS; i++)
		{
		char	mybet[ 5 ] = {0};
		for (int j = 0; j < 4; j++) mybet[j] = (rand()%10)|'0';
		int	pid = fork();
		if ( pid == 0 ) execl( "./showarg1", "showarg1", mybet, NULL );
		}
	
	for (int i = 0; i < N_TASKS; i++) wait( NULL );	
}