package com.lf.trianglenumber;

public class Test {

    public static void main(String[] args) {

        // 打印的行数

        int count = 10;

        // 创建二维数组

        int[][] triangleNum = new int[count][];

        // 遍历，创建一维数组并赋值

        for (int i = 0; i < triangleNum.length; i++) {

            //创建一维数组

            triangleNum[i] = new int[i+1];

            // 遍历，给一维数组赋值

            for (int j = 0; j < triangleNum[i].length; j++) {

                //判断是否是首位和末位，如果是就赋值1，不是就用上一行相邻的数相加

                if (j==0 || j==triangleNum[i].length-1) {

                    triangleNum[i][j] = 1;

                }else {

                    triangleNum[i][j] = triangleNum[i-1][j]+triangleNum[i-1][j-1];

                }

                System.out.print(""+triangleNum[i][j]+"\t");

            }

            System.out.println("");

        }

    }

}