java输出一个空心菱形
时间: 2023-03-20 08:00:56 浏览: 47
下面是一个Java程序,可以输出一个空心菱形:
```java
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("请输入菱形的边长:");
int n = sc.nextInt();
// 打印上半部分
for (int i = 1; i <= n; i++) {
for (int j = n - i; j > 0; j--) {
System.out.print(" ");
}
System.out.print("*");
for (int j = 1; j < 2 * i - 2; j++) {
System.out.print(" ");
}
if (i != 1) {
System.out.print("*");
}
System.out.println();
}
// 打印下半部分
for (int i = n - 1; i >= 1; i--) {
for (int j = n - i; j > 0; j--) {
System.out.print(" ");
}
System.out.print("*");
for (int j = 1; j < 2 * i - 2; j++) {
System.out.print(" ");
}
if (i != 1) {
System.out.print("*");
}
System.out.println();
}
}
}
```
程序会首先要求用户输入菱形的边长,然后根据输入的边长打印出一个空心菱形。
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