我的明胶功能的输出都搞砸了

Question

我希望此程序中的输出是输入中每个单词的piglatin版本，但它只是为字符串中的每个字母打印“ay”

 #include <iostream>
    using namespace std;

    char firstLetter;

    int pigLatin();

    string word;

    int wordFinder();

    char firstVowel;

    char x;

    char vowel = ('a' || 'e' || 'i' || 'o' || 'u' || 'y' || 'A' || 'E' || 'I' || 'O' || 'U' || 'Y');

    string engSentence;

    bool vowelChecker (char c) // will check to see if there is a vowel

    {

        if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' || c == 'y' || c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U' || c == 'Y')
        {
            return true;
        }

    else
        {
            return false;
        }
    }
    int main()
    {
        cout << "Please enter a sentence for me to translate: " << endl;

        getline(cin, engSentence); //will get the whole line entered
        wordFinder(); //runs wordfinder function
    }
    int wordFinder() //will find words within a string
    {
        char* letter = &engSentence[0];
        while ( *letter != '\0') //while the string isn't done...
        {
            if ( *letter == ' ' || '.' || ',') //if there is a space, comma or period...
            {
                cout << " "; // add a space after the word
                word = ""; // create word
                pigLatin(); //run piglatin func

            }
            else
            {
                word += *letter; //adds letters to the word if no space comma or period is found.
            }
            letter++;
        }
        return 0;
    }
    int pigLatin()
    {
        int lastLetter = word.length();
        firstLetter = word[0];

        if (firstLetter == vowel) //if the first letter of a word is a vowel...
        {
            cout << word << "way "; // print the word
        }
        else if (firstLetter != vowel) //if the first letter is not a vowel...
        {
            for (x = 1; x < word.length(); x++) //in the loop of starting at the second letter and going to the last letter...
            {
                if (vowelChecker(word.at(x) || word.at(x) == 'y' || word.at(x) == 'Y')) // check each letter to see if there is a vowel...
                {
                    char firstVowel = x; //says that the first vowel is at point x
                    break;
                }

            }
            cout << word.substr(firstVowel, lastLetter) << word.substr(0, firstVowel) << "ay ";
            //above is stating that it will first print the part of the word from the first vowel to the last letter,
            //then it will print from the first letter to the first vowel and add 'ay' to the end

        }

    }

此程序返回“ay”，因为输入中有许多字母。 例如，如果我的输入是“hello”，它会输出“ay ay ay ay ay” 帮助