CSCI 131 Techniques of Programming--Spring 2014

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Solution to Lab 4 lotto.cc

//***********************************************************************
// lotto.cc
//     Author: Constance Royden/Laurie King
//     Date: February 23, 2014
//     Class:   CSCI 131
//     Purpose: This program generates lottery numbers 
//     Input:   (from standard input) an integer
//     Output:  (to standard output) a listing of lottery numbers 
//***********************************************************************

#include <iostream>
#include <cmath>
using namespace std;

int Random ( long int& );

int main( void )
{
  long int myseed;
  int numPeople;
  int count;
  
  // ASSIGN THE VARIABLE myseed A VALUE HERE
  myseed = 34543;

  // INSERT PROGRAM CODE HERE 
  cout << "How many people need lottery numbers? ";
  cin >> numPeople;

  cout << "Your lucky lottery numbers for the day are: " << endl;
  cout << "Pick 3     Pick 4      Pick 6";

  for ( count = 0; count < numPeople*13; count++) {
    if ((count % 13) == 0) {
      cout << endl;
    } else if ((count % 13) == 3 ) {
      cout << "     ";
    } else if ((count % 13) == 7) {
      cout << "    ";
    }
    cout << Random(myseed) << " ";
  }
  cout << endl;

} // main


//************************************************************
// int Random ( long int& seed )
//     Purpose:       produces a pseudo-random number
//     Postcondition: returns a pseudo-random number in (0,1)
//************************************************************
int Random ( long int& seed )   // seed for the random number generator
{
    const long int MODULUS    = 65536;
    const int      MULTIPLIER = 25173;
    const int      INCREMENT  = 13849;
  
    seed = (MULTIPLIER * seed + INCREMENT) % MODULUS;
    return (1 + int(9 * (double(seed) / double(MODULUS))));
} // Random

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CSCI 131: Techniques of Programming
Last Modified: February 23, 2014
Page Expires: October 12, 2014