题解 | 杨辉三角-Java

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int[][] biarr = new int[n][n];
        for (int i = 0; i < n; i++) {
            for (int j = 0; j <= i; j++) {
                if (j == 0 || j == i) biarr[i][j] = 1;
                else biarr[i][j] = biarr[i - 1][j - 1] + biarr[i - 1][j];
                System.out.print(biarr[i][j] + " ");
            }
            System.out.println();
        }
    }
}