package 作业3;

import java.util.Scanner;

public class Demo3 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int num;
		System.out.println("输入层高：");
		while (!sc.hasNextInt()) {
			String st = sc.next();
			System.out.println("输入的数是" + st + ",请输入正整数：");
		}
		num = sc.nextInt();
		// 外层控制行
		for (int i = 0; i < num; i++) {
			// 内层控制列
			for (int j = 0; j < num; j++) {
				System.out.print("*");
			}
			System.out.println();
		}
		for (int i = 0; i < num; i++) {
			for (int j = 0; j <= 2 * i; j++) {
				System.out.print("*");
			}
			System.out.println();
		}

	}

}