[프로그래머스] 시저 암호

---

title: "시저 암호"
category: 프로그래머스[Level-1]
tags: [C++, JavaScript, 프로그래머스]
date: "2021-01-20"

---

문제 링크

시저 암호

C++

#include <string>
#include <vector>
#include <iostream>

using namespace std;

string solution(string s, int n) {
    string answer = "";

    for(int i=0; i<s.length(); i++){
        char c = s[i];
        if(c >= 'A' && c <= 'Z'){
            if(c+n <= 'Z') c += n;
            else c += n-26;
        }
        else if(c >= 'a' && c <= 'z'){
            if(c+n <= 'z') c += n;
            else c += n-26;
        }
        answer += c;
    }

    return answer;
}

JavaScript

function solution(s, n) {
  var answer = "";

  let upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  let lower = upper.toLowerCase();

  for (let i = 0; i < s.length; i++) {
    let c = s[i];
    if (c >= "A" && c <= "Z") {
      c = upper[(upper.indexOf(c) + n) % upper.length];
    } else if (c >= "a" && c <= "z") {
      c = lower[(lower.indexOf(c) + n) % lower.length];
    }
    answer = answer.concat(c);
  }

  return answer;
}