명품 C++ Programming 5장 OpenChallenge

#include <iostream>
#include <string>
using namespace std;
 
class Morse {
    string alphabet[26];
    string digit[10];
    string slash, question, comma, period, plus, equal;
public:
    Morse();
    void text2Morse(string text, string& morse);
    bool morse2Text(string morse, string& text);
};
 
Morse::Morse() {
    string alphabet[26] = { ".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.",
                            "---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.." };
    string digit[10] = { "-----",".----","..---","...--","....-",".....","-....","--...","---..","----." };
    for (int i = 0; i < 26; i++) {
        this->alphabet[i] = alphabet[i];
    }
    for (int i = 0; i < 10; i++) {
        this->digit[i] = digit[i];
    }
    slash = "-..-."; question = "..--.."; comma = "--..--"; period = ".-.-.-"; plus = ".-.-."; equal = "-...-";
}
 
void Morse::text2Morse(string text, string& morse) {
    int size = text.length();
    morse = "";
    for (int i = 0; i < size; i++) {
        char c = text[i];
        if (c == '/')        morse = morse + slash + " ";
        else if (c == '?')    morse = morse + question + " ";
        else if (c == ',')    morse = morse + comma + " ";
        else if (c == '.')    morse = morse + period + " ";
        else if (c == '+')    morse = morse + plus + " ";
        else if (c == '=')    morse = morse + equal + " ";
        else if (isdigit(c)) morse = morse + digit[c - 48] + " ";
        else if (isalpha(c)) {
            if (isupper(c)) {
                morse = morse + alphabet[c - 65] + " ";
            }
            else if (islower(c)) {
                morse = morse + alphabet[c - 97] + " ";
            }
        }
        else if (c == ' ')    morse += "   ";
    }
}
 
bool Morse::morse2Text(string morse, string &text) {
    string bufMorse;
    text2Morse(text, bufMorse);
    if (bufMorse == morse) return true;
    else return false;
}
 
 
int main() {
    string text, morse;
    Morse m;
    cout << "아래에 영문 텍스트를 입력하세요. 모스 부호로 바꿉니다." << endl;
    getline(cin, text);
    m.text2Morse(text, morse);
    cout << morse << endl << endl;
    cout << "모스 부호를 다시 영문 텍스트로 바꿉니다." << endl;
    if (m.morse2Text(morse, text)) cout << text << endl;
    else cout << "오류 발생!" << endl;
}