KINA★潘朵拉之旅 跑 跳 碰

import java.util.Scanner;
public class a{
public static void main(String args[]){
Scanner input=new Scanner(System.in);
int n;
System.out.print("輸入一正整數:");
n=input.nextInt();
for(int i=1;i<=n;i++){
for(int j=1;j<=i;j++)
System.out.print("*");
System.out.println();}
System.out.println();
for(int i=n;i>=1;i--){
for(int k=1;k<=n-i;k++)System.out.print(" ");
for(int j=1;j<=i;j++)System.out.print("*");
System.out.println();}
}}



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