Question

我一直在制作一个将字母，数字和标点符号转换为莫尔斯电码的程序。

字母和数字按照我的意愿运作。

但是由于标点符号，我无法使其正常工作。我希望有人能看看我的代码并帮助我。

#include <iostream>
#include <cstring>
#include <sstream>
using namespace std;



    char ch;
    string morseWord = "";

    for(unsigned int i=0; i < word.length(); i++)
    {
        if(isalpha(word[i]))
        {
            ch ;
        }
    }
    return morseWord;
}


    char ch;
    string morseWord = "";

    for(unsigned int i=0; i < word.length(); i++)
    {
        if(isdigit(word[i]))
        {
            ch = word[i];
            ch = toupper(ch);
            morseWord += morseCode[ch - '0'];
            morseWord += " ";

    string morseWord = "";

    for(unsigned int i=0; i < word.length(); i++)
    {
        if(ispunct(word[i]))
        {
            ch = word[i];
            ch = toupper(ch);
            morseWord += morseCode[ch - '.'];
            morseWord += " ";
        }
    }
    return morseWord;
}



int main()
{   
    stringstream ss;
    string sentence;
    string word = "";

    code: " << endl;

    while(ss >> ToMorse(word) << endl;
        cout << PunctuationToMorse(word) << endl;
}

Answer 1

您的主要问题是您错过了while()函数中main()循环的大括号：

while(ss >> word) { // <<<< Put an opening brace here
    cout << EnglishToMorse(word) << endl;
    cout << NumbersToMorse(word) << endl;
    cout << PunctuationToMorse(word) << endl;
} // <<<<< ... and a closing brace here

通常更好的方法是：

使用std::map<char,std::string>映射可以转换为莫尔斯代码的所有已知字符，并且只有一个函数来处理这些：

string CharToMorse(char c) {
    static const std::map<char,std::string> morseCode = {
        { 'A', ".-" } ,
        { 'B' , "-..." } , 
        { 'C', "-.-." } ,
        // ...
        { 'Z', "--.." },
        { '0', ".----" } , 
        { '1', "..---" } , 
        { '2', "...--" } ,
        // ...
        { '9', "-----" } ,
        { ' ', "......." } // Consider to support spaces between words
        { '.', ".-.-.-" } ,
        { '!' , "..--.." } , 
        { '?' , "-.-.--"}
    };

    auto morseString = morseCode.find(toUpper(c));
    if(morseString != morseCode.end()) {
        return morseString->second;
    }
    return "";
}

并使用它：

int main() {   
    stringstream ss;
    string sentence;

    cout << "Enter a English word, number or punctuation: ";
    getline(cin, sentence);
    ss << sentence;
    cout << "Morse code: " << endl;
    char c;
    while(ss >> c) {
        cout << CharToMorse(c);
    }
    cout << endl;
}

您的实际代码存在的问题是，它假设依赖于ASCII字符代码表映射，'Z' - 'A' == 25。 c ++标准无法保证这一点，并使您的代码不可移植（请参阅here）。

C ++将ASCII转换为莫尔斯代码

1 个答案: