*打印菱形

import java.util.Scanner;

public class Dome01 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入高度：");
        int tall = scanner.nextInt();

        //正方形
        for (int i = 0; i < tall; i++) {
            for (int j = 0; j < tall; j++) {
                System.out.print("*");
            }
            System.out.println();
        }
        System.out.println();

        //三角形
        for (int i = 0; i <= tall; i++) {
            for (int j = tall; j > i; j--) {
                System.out.print(" ");
            }
            for (int j = 0; j < 2*i-1; j++) {
                System.out.print("*");
            }
            System.out.println();
        }
        System.out.println();

        //平行四边形
        for (int i = 0; i < tall; i++) {
            for (int j = tall; j > i; j--) {
                System.out.print(" ");
            }
            for (int j = 0; j < tall; j++) {
                System.out.print("*");
            }
            System.out.println();
        }
        System.out.println();
        
        //菱形
        //上部分
        int input=(tall+1)/2;
        for (int i = 0; i <= input; i++) {
            for (int j = input; j > i; j--) {
                System.out.print(" ");
            }
            for (int j = 0; j < 2*i-1 ; j++) {
                System.out.print("*");
            }
            System.out.println();
            }


        /**
         *下部分
         * 注意；
         * j初值为1
         * 外层循环是要小于等于层数的
         * 内层输出*层，k的值是大于等于2*j-1
         */
        for (int j = 1; j <= input-1 ; j++) {
            for (int k = 0; k < j; k++) {
                System.out.print(" ");
            }
            for (int k = (input-1)*2-1; k >= 2*j-1  ; k--) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}