JAVA 基础编程练习题33 程序 33 杨辉三角

Posted 2022-09-12 denggelin

 

33 【程序 33 杨辉三角】

题目：打印出杨辉三角形（要求打印出 10 行如下图）

程序分析：

1

1 1

1 2 1

1 3 3 1

1 4 6 4 1

1 5 10 10 5 1

 

package cskaoyan;

public class cskaoyan33 
	@org.junit.Test
	public void pascalsTriangle() 
		int[][] arr = new int[6][6];

		for (int i = 0; i < 6; i++) 
			arr[i][0] = 1;
			arr[i][i] = 1;
		

		for (int i = 2; i < 6; i++) 
			for (int j = 1; j < i; j++) 
				arr[i][j] = arr[i - 1][j - 1] + arr[i - 1][j];
			
		

		for (int i = 0; i < 6; i++) 
			for (int j = 0; j < i + 1; j++) 
				System.out.print(arr[i][j] + " ");
			
			System.out.println();