[BOJ][2446] 별 찍기 - 9

1. 문제 링크

https://www.acmicpc.net/problem/2446

2. 사용 알고리즘

구현

3. 풀이

반복문을 돌며 별 출력

4. 소스 코드

4-1. C++

https://github.com/dev-aiden/problem-solving/blob/main/boj/2446.cpp

#include <iostream>

using namespace std;

int main(void) {
    ios_base::sync_with_stdio(false);
    int n; cin >> n;
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < i; ++j) cout << " ";
        for (int j = i * 2; j < (n * 2) - 1; ++j) cout << "*";
        cout << "\n";
    }
    for (int i = 0; i < n - 1; ++i) {
        for (int j = i; j < n - 2; ++j) cout << " ";
        for (int j = 0; j < (i * 2) + 3; ++j) cout << "*";
        cout << "\n";
    }
    return 0;
}

4-2. JAVA

https://github.com/dev-aiden/problem-solving/blob/main/boj/2446.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb = new StringBuilder();
        int n = Integer.parseInt(br.readLine());
        for (int i = 0; i < n; ++i) {
            for (int j = 0; j < i; ++j) sb.append(" ");
            for (int j = i * 2; j < (n * 2) - 1; ++j) sb.append("*");;
            sb.append("\n");
        }
        for (int i = 0; i < n - 1; ++i) {
            for (int j = i; j < n - 2; ++j) sb.append(" ");
            for (int j = 0; j < (i * 2) + 3; ++j) sb.append("*");;
            sb.append("\n");
        }
        System.out.println(sb);
    }
}