[BaekJoon] 2754번 - 학점계산 [Java][C++]

문제 링크

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1. 문제 풀이

평점을 출력하는 문제로 조건문을 활용해서 출력하면 된다.

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2. 코드

1. 풀이 [Java]

import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        String grade = br.readLine();
        double ans = 0;

        if (grade.charAt(0) == 'A') {
            ans += 4;
        } else if (grade.charAt(0) == 'B') {
            ans += 3;
        } else if (grade.charAt(0) == 'C') {
            ans += 2;
        } else if (grade.charAt(0) == 'D') {
            ans += 1;
        } else {
            System.out.println(ans);
            return;
        }

        if (grade.charAt(1) == '+') {
            ans += 0.3;
        } else if (grade.charAt(1) == '-') {
            ans -= 0.3;
        }

        System.out.println(ans);
    }
}

2. 풀이 [C++]

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    string grade;
    cin >> grade;

    double ans = 0;

    if (grade.front() == 'A') {
        ans += 4;
    } else if (grade.front() == 'B') {
        ans += 3;
    } else if (grade.front() == 'C') {
        ans += 2;
    } else if (grade.front() == 'D') {
        ans += 1;
    } else {
        cout << fixed << setprecision(1) << ans;
        return 0;
    }

    if (grade.back() == '+') {
        ans += 0.3;
    } else if (grade.back() == '-') {
        ans -= 0.3;
    }

    cout << fixed << setprecision(1) << ans;
}

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