> cat rand1.C

// file rand1.C, cs2223, D97/98 //
// test of random number generator

// 10Apr98 NW, First version

// includes
#include "headers.h"

// main()
int main ()
	{
	int first;
	while (1)
		{
		cout << "please enter your lucky number: ";
		cin >> first;
		if (first < 0) return 0; // exit condition
		srand(first); // use to seed random number generator
		int counter = 0;
		while (rand() != first) counter++; // count until first repeats
		cout << first << " wasn't that lucky, it didn't repeat until " << counter << " tries" << endl;
		}
	return 0;
	} // end main()

// Copyright 1998 Norman Wittels

> g++ rand1.C

> a.out

please enter your lucky number: 0
0 wasn't that lucky, it didn't repeat until 0 tries
please enter your lucky number: 1
1 wasn't that lucky, it didn't repeat until 8001 tries
please enter your lucky number: 2
2 wasn't that lucky, it didn't repeat until 52293 tries
please enter your lucky number: 3
3 wasn't that lucky, it didn't repeat until 3723 tries
please enter your lucky number: 4
4 wasn't that lucky, it didn't repeat until 33874 tries
please enter your lucky number: 5
5 wasn't that lucky, it didn't repeat until 1203 tries
please enter your lucky number: 6
6 wasn't that lucky, it didn't repeat until 3964 tries
please enter your lucky number: 7
7 wasn't that lucky, it didn't repeat until 6126 tries
please enter your lucky number: 8
8 wasn't that lucky, it didn't repeat until 2500 tries
please enter your lucky number: 9
9 wasn't that lucky, it didn't repeat until 17933 tries
please enter your lucky number: 10
10 wasn't that lucky, it didn't repeat until 33561 tries
please enter your lucky number: -3

>