蓝桥杯 BASIC-6 杨辉三角形**

要想到二重数组来求解就很容易

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
       Scanner reader=new Scanner(System.in);
       int n=reader.nextInt();
       int[][] yanghui=new int[n][n];
       for (int i=0;i<n;i++){
           yanghui[i][0]=1;
           yanghui[i][i]=1;
           for (int j=0;j<i;j++){
               yanghui[i][j+1]=yanghui[i-1][j]+yanghui[i-1][j+1];
           }
       }
       for (int i=0;i<n;i++){
           for (int j=0;j<=i;j++){
               System.out.print(yanghui[i][j]+" ");
           }
           System.out.println();
       }
    }
}