[HackerRank][Java] Day 2: Operators(연산자)

문제 (링크)

문제 설명

어렵지 않게 문제에 나온 식만 따라하면 되는 문제다.

반올림을 쓸 때는 Math.round(반올림할 값)을 쓰면 된다.

scan.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");

답에서 위와 같이 scan.skip이 써있는 이유는 여러줄을 입력받을 때 공백의 엔터값을 스킵하기 위해서다.

답 (Java)

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;
 
public class Solution {
 
    // Complete the solve function below.
    static void solve(double meal_cost, int tip_percent, int tax_percent) {
        double tip = meal_cost * tip_percent / 100;
        double tax = meal_cost * tax_percent / 100;
        double total_cost = meal_cost + tip + tax;
 
        System.out.print(Math.round(total_cost));
    }
 
    private static final Scanner scanner = new Scanner(System.in);
 
    public static void main(String[] args) {
        double meal_cost = scanner.nextDouble();
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
 
        int tip_percent = scanner.nextInt();
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
 
        int tax_percent = scanner.nextInt();
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
 
        solve(meal_cost, tip_percent, tax_percent);
 
        scanner.close();
    }
}