蓝桥网试题 java 基础练习 杨辉三角形

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算法

 import java.util.*;
 public class Main {
     public static void main(String[] args) {
         int n = new Scanner(System.in).nextInt();
         int[] a = null;
         System.out.println(1);
         for(int i=2;i<=n;i++){
             int[] s = new int[i];
             s[0] =s[i-1] = 1;
             System.out.print("1 ");
             for(int j=1;j<=i-2;j++){
                 s[j] = a[j-1]+a[j];
                 System.out.print(s[j]+" ");
             }
             System.out.println("1");
             a = s;
         }
     }
 }