[알고리즘문제풀기] 대소문자 바꿔서 출력하기

문제

내가 작성한 정답

Java

import java.util.Scanner;

class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        StringBuilder sb = new StringBuilder();
        for(char c:a.toCharArray()) {
            if (Character.isLowerCase(c)) {
                sb.append(Character.toUpperCase(c));
            } else {
                sb.append(Character.toLowerCase(c));
            }
        }
        System.out.println(sb);
    }
}

JavaScript

const readline = require('readline');
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

let input = [];

rl.on('line', function (line) {
    input = [line];
}).on('close',function(){
    str = input[0];
    let answer = '';
    for(let i=0;i<str.length; i++){
        const c = str[i];
        if(c===c.toUpperCase(str[i])){
            answer += c.toLowerCase();
        }else{
            answer += c.toUpperCase();
        }
    }
    console.log(answer);
});

다른 사람들의 정답

Java

import java.util.Scanner;

public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        for(int i=0; i<a.length(); i++) {
            char c = a.charAt(i);
            if(Character.isUpperCase(c)) {
                System.out.print((char)(c+32));
            }
            else {
                System.out.print((char)(c-32));
            }
        }
    }
}

JavaScript

const readline = require('readline');
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

let input = [];

rl.on('line', function (line) {
    input = [line];
}).on('close',function(){
    str = input[0].split('');
    str.forEach((value, index) => {
        if (value === value.toUpperCase()) {
            str[index] = value.toLowerCase();
        } else {
            str[index] = value.toUpperCase();
        }
    });
    console.log(str.join(''));
});