ZZULIOJ 1077: 空心菱形，Java

1077: 空心菱形

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
    Scanner cin = new Scanner(System.in);int n=cin.nextInt();for(int i=1;i<=n;i++){
    for(int j=1;j<=n+i-1;j++){
    if(j==n+i-1||j==n+1-i) System.out.print("*");else System.out.print(" ");}System.out.println();}for(int i=1;i<n;i++){
    for(int j=1;j<=2*n-i-1;j++){
    if(j==2*n-i-1||j==i+1) System.out.print("*");else System.out.print(" ");}System.out.println();}}
}