package pascal;

import java.awt.Color;

import java.awt.Graphics;

import javax.swing.JFrame;

public class Pascal extends JFrame

{

public Pascal()

{

setBackground(Color.white);

setTitle("巴斯卡三角形");

setSize(520, 350);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

show();

}

private long combi(int n, int r)

{

int i;

long p = 1;

for(i = 1; i <= r; i++)

p = p * (n-i+1) / i;

System.out.println("p=" + p + " n=" + n);

return p;

}

public void paint(Graphics g)

{

final int N = 12;

int n, r, t;

for(n = 0; n <= N; n++)

{

for(r = 0; r <= n; r++)

g.drawString(" " + combi(n, r),

(N-n)*20 + r * 40, n * 20 + 50);

}

}

public static void main(String[] args)

{

Pascal frm = new Pascal();

}

}