พีระมิต (pyramid) : java

วันนี้นั่งแย่งโจทย์น้องฝึกงานเล่นครับ

package com.blogspot.na5cent.learning;

import java.util.Scanner;

/**
 * @author redcrow
 */
public class Pyramid {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int size = n * (n + 1) / 2;
        int bigSpace = (n - 1) / 2;

        for (int i = 1; i <= size; i++) {
            int numb = i % n;
            int space = bigSpace - i / n;

            boolean star = numb > space && numb <= (n - space);
            System.out.print(star ? "*" : " ");
            System.out.print(numb == 0 ? "\n" : "");
        }
    }
}