fig03_09.cpp

《c＋＋大学教程》源码

// Fig. 3.9: fig03_09.cpp
// Randomizing die-rolling program.
#include <iostream>

using std::cout;
using std::cin;
using std::endl;

#include <iomanip>

using std::setw;

// contains prototypes for functions srand and rand
#include <cstdlib>

int main()
{
   unsigned seed;

   cout << "Enter seed: ";
   cin >> seed;
   srand( seed );  // seed random number generator

   // loop 10 times
   for ( int counter = 1; counter <= 10; counter++ ) {
      
      // pick random number from 1 to 6 and output it
      cout << setw( 10 ) << ( 1 + rand() % 6 );

      // if counter divisible by 5, begin new line of output
      if ( counter % 5 == 0 )
         cout << endl;

   } // end for 

   return 0;  // indicates successful termination

} // end main


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 * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice      *
 * Hall. All Rights Reserved.                                             *
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