//「コアJava2」P128をApplet版に書き換えたもの
//cd c:\JavaTry2005\Pascal
//javac Pascal2.java -Xlint:unchecked
//appletviewer Pascal2.java

import java.awt.*;
import java.util.*;
import java.applet.Applet;

/*
 <applet code="Pascal2.class" width=800 height=600>
  </applet>
*/

public class Pascal2 extends Applet {
   public void paint(Graphics g) {
      final int NMAX = 15;
      int[][] odds = new int[NMAX + 1][];
      for (int n = 0; n <= NMAX; n++)
         odds[n] = new int[n + 1];

      // fill triangular array
      for (int n = 0; n < odds.length; n++)
         for (int k = 0; k < odds[n].length; k++) {
            /*
               compute binomial coefficient
               n * (n - 1) * (n - 2) * . . . * (n - k + 1)
               -------------------------------------------
               1 * 2 * 3 * . . . * k
            */
            int lotteryOdds = 1;
            for (int i = 1; i <= k; i++)
               lotteryOdds = lotteryOdds * (n - i + 1) / i;

            odds[n][k] = lotteryOdds;
         }
       setBackground(Color.yellow);
       g.setFont(new Font("Serif", Font.BOLD, 20));
       g.setColor(Color.blue);

      // print triangular array
      for (int n = 0; n < odds.length; n++) {
         for (int k = 0; k < odds[n].length; k++) {
             String output =(new Integer(odds[n][k])).toString();
             g.drawString(output,400 - 25 * n + 45 * k, 50 + 30 * n);
    /*        String output = "    " + odds[n][k];
            // make output field 4 characters wide
            output = output.substring(output.length() - 4);
            System.out.print(output);
    */
         }
      }
   }
}