package 作业3;

import java.util.Scanner;

public class Demo4 {

	public static void sanJiaoXing(int rows) {
		for (int i = 1; i <= rows; i++) {// i--控制行
			for (int j = rows - i; j >= 0; j--) {// j--控制空格的数量
				System.out.print(" ");
			}
			for (int k = 1; k <= 2 * i - 1; k++) {// k--控制数量
				System.out.print("*");
			}
			System.out.println();// 每循环一次换行
		}
	}

	public static void main(String[] args) {
		System.out.println("请输入行数");
		Scanner in = new Scanner(System.in);
		int rows = in.nextInt();
		Demo4.sanJiaoXing(rows);
	}
}