fig04_11.cpp

来自「经典vc教程的例子程序」· C++ 代码 · 共 30 行

// Fig. 4.11: fig04_11.cpp
// Roll a six-sided die 6000 times
#include <iostream.h>
#include <iomanip.h>
#include <stdlib.h>
#include <time.h>

int main()
{
   const int arraySize = 7;
   int face, frequency[ arraySize ] = { 0 };

   srand( time( 0 ) );

   for ( int roll = 1; roll <= 6000; roll++ )       
      ++frequency[ 1 + rand() % 6 ]; // replaces 20-line switch
                                     // of Fig. 3.8

   cout << "Face" << setw( 13 ) << "Frequency" << endl;

   // ignore element 0 in the frequency array
   for ( face = 1; face < arraySize ; face++ )  
      cout << setw( 4 ) << face
           << setw( 13 ) << frequency[ face ] << endl;

   return 0;
}