杨辉三角

package com.oop.demo01;
public class yanghui {
    public static void main(String[] args) {
        int[][] yanghui=new int[12][];
        for (int i = 0; i <yanghui.length ; i++) {
            yanghui[i] = new int[i + 1];//给一个一维数组增加新空间
            for (int j = 0; j <yanghui[i].length ; j++) {
                if(j == 0 || j==yanghui[i].length-1){
                    yanghui[i][j]=1;
                }else{
                    yanghui[i][j]=yanghui[i-1][j-1]+yanghui[i-1][j];
                }

            }

        }
        for (int i = 0; i <yanghui.length ; i++) {
            for (int j = 0; j <yanghui[i].length ; j++) {
                System.out.print(yanghui[i][j]+"\t");

            }
            System.out.println();
        }
    }
}