带前导0的数字三角形（洛谷P5721题题解）

题目要求

P5721题题解

分析

注意补0呀

AC代码（Java语言描述）

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int num = scanner.nextInt();
        scanner.close();
        int temp = 0;
        for (int i = 1; i <= num; i++) {
            for (int j = 1; j <= num-i+1; j++) {
                temp++;
                if (temp < 10) {
                    System.out.print("0" + temp);
                } else {
                    System.out.print(temp);
                }
            }
            System.out.println();
        }
    }
}