Outline of Class 9: Simulation, Continued

Miscellaneous

• No one has signed up for this week's Sunday dinner. Try to let me know by 3pm today if you're interested in coming this week.
• I will not have office hours next Tuesday.
• The department is currently debating whether to offer Artificial Intelligence or Computer Networks during Spring 1998.
  • Would any of you be interested in taking either course?
  • Most of you would only be allowed to take AI.
• Some examples of Java programs are now available.

Simulation Exercise

• Today, we're going to continue in our exercise to build a reasonable "simulation" of a game.
• Last class, we designed a ScoreBoard class and each began coding it.
• This class, we will continue to work on the simulation.

The scoreboard

• Add a public String summarize() method that returns a string of the form [*] ## - ## [*], where the star is used to indicate service, and the numbers are the two player's scores.
• Generate javadoc documentation for your program.
• If most of you have finished the ScoreBoard simulation, we'll go on to the next part. If only a few of you have, we'll continue to let you work on them.
  • Those who have finished with their simulation should develop a test program for their simulation.

Test the simulation

• Using only the javadoc comments for someone elses ScoreBoard class, write an appropriate test program.
• Here's a sample:

   import ScoreBoard;
   public class TestScoreBoard {
     public static void main(String[] args) {
       ScoreBoard score = new ScoreBoard();	// The sb we're testing
       int i; // For loops
   
       score.reset();
       System.out.println("Initial settings: " +
                          score.summarize());
   
       score.setService(1);
       System.out.println("After giving service to player one: " +
                          score.summarize());
   
       score.setService(2);
       System.out.println("After giving service to player two: " +
                          score.summarize());
   
       // Score a few points for the serving player
       for(i = 0; i < 10; ++i) {
         score.recordPoint(score.getService());
       }
       System.out.println("After letting server win a few points: " +
                          score.summarize());
   
       score.reset();
       System.out.println("Reset to: " +
                          score.summarize());
   
       // More general testing
       for(i = 0; i < 10; ++i) {
         if (Math.random() < 0.5) {
           score.serverWon();
           System.out.println("Server won: " + score.summarize());
         }
         else {
           score.serverLost();
           System.out.println("Server lost: " + score.summarize());
         }
       } // for
     } // TestScoreBoard
   } // TestScoreBoard
  

Change the rules

• Working with another student (so that you have a paired ScoreBoard and a TestScoreBoard), change the rules of the game to those of ping pong
  • Whoever wins a volley scores a point
  • Serve switches every five points
  • Must win by 2 (I'm not sure if this is a ping-pong rule, but hey, let's do it anyway)
  • 11-0 is still a shutout
  • 21-x is the normal win