Similarity

#include <iostream>
#include <string>
#include <sstream>

std::string recordWordsFromText (std::string & text){

std::istringstream istr(text);

std::string onlyWords;

istr >> onlyWords;

for(int i = 0; i < onlyWords.size(); i++){

    if(onlyWords[i] == ',' ||
       onlyWords[i] == '.' ||
       onlyWords[i] == ';' ||
       onlyWords[i] == '!' ||
       onlyWords[i] == '?'){

        onlyWords.replace(i,1," ");
    }
}

}
return onlyWords;

}


bool lettersMatch (std::string recordedWord, std::string singleWord, int similarityPercent){

    int len = (int)recordedWord.size();
    double matchingLetter = 0;

    for(int i = 0; i < len; i++){

        if(recordedWord[i] == singleWord[i]){

            matchingLetter ++;
        }
    }

    double matchingPercent = (matchingLetter / len) * 100;

    if(similarityPercent <= matchingPercent){

        return true;

    }


    return false;


}



bool areSimilar (std::string recordedWord, std::string singleWord, int similarityPercent){

    int recLen = recordedWord.size();
    int singleLen = singleWord.size();

    if(   recLen == singleLen
       && recordedWord[0] == singleWord[0]
       && lettersMatch(recordedWord,singleWord,similarityPercent) == 1){

        return true;
    }

        return false;

}


int main(){

    std::string text;
    std::string word;
    int similarityPercent = 0;

    getline(std::cin,text);
    std::cin >> word >> similarityPercent;

    std::string newStr = recordWordsFromText(text);

    std::cout << newStr << std::endl;

    std::istringstream istr(newStr);

    std::string currentWord;

    int similarWords = 0;

    while(istr >> currentWord){

        if(areSimilar(currentWord,word,similarityPercent) == 1){

            similarWords++;
        }
    }

    std::cout << similarWords;


    return 0;
}