C语言实验——打印菱形(java)

Problem Description

Input

Output

Sample Input

5

Sample Output

*
***
*****
*******
*********
*******
*****
***
*

import java.util.Scanner;
public class Main {

public static void main(String[] args) {
Scanner reader = new Scanner(System.in);
int i,n,j;
int m;
n = reader.nextInt();
for(i=1; i<=n; i++)
{
for(j=1; j<=n-i; j++)
System.out.printf(" ");
for(m=1; m<=2*i-1; m++)
System.out.printf("*");
System.out.printf("\n");
}
for(i=n-1; i>=1; i--)
{
for(j=1; j<=n-i; j++)
System.out.printf(" ");
for(m=1; m<=2*i-1; m++)
System.out.printf("*");
System.out.printf("\n");
}
}
}