snakeeyes.java

java源程序 对初学者有很大的帮助 从简单到复杂

//********************************************************************
//  SnakeEyes.java       Author: Lewis/Loftus
//
//  Demonstrates the use of a class with overloaded constructors.
//********************************************************************

public class SnakeEyes
{
   //-----------------------------------------------------------------
   //  Creates two die objects, then rolls both dice a set number of
   //  times, counting the number of snake eyes that occur.
   //-----------------------------------------------------------------
   public static void main (String[] args)
   {
      final int ROLLS = 500;
      int snakeEyes = 0, num1, num2;

      Die die1 = new Die();    // creates a six-sided die
      Die die2 = new Die(20);  // creates a twenty-sided die

      for (int roll = 1; roll <= ROLLS; roll++)
      {
         num1 = die1.roll();
         num2 = die2.roll();

         if (num1 == 1 && num2 == 1)  // check for snake eyes
            snakeEyes++;
      }

      System.out.println ("Number of rolls: " + ROLLS);
      System.out.println ("Number of snake eyes: " + snakeEyes);
      System.out.println ("Ratio: " + (float)snakeEyes/ROLLS);
   }
}