题解 | #菱形图案#

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            int n = sc.nextInt();
            //上三角
            for (int c = 0; c < n; c++) {
                for (int a = n - c ; a > 0; a--) {
                    System.out.print(" ");
                }
                for (int b = 0; b <= c; b++) {
                    System.out.print("* ");
                }
                System.out.println();
            }
            //中间线
            for (int s = 0; s <= n; s++) {
                System.out.print("* ");
            }
            System.out.println();
            //下三角
            for (int c = 0; c < n; c++) {
                for (int b = 0; b <= c; b++) {
                    System.out.print(" ");
                }
                for (int a = n - c ; a > 0; a--) {
                    System.out.print("* ");
                }
                System.out.println();
            }
        }
    }
}