Programming Challenge 10.16 - Pig Latin

/* Pig Latin - This program reads a sentence as input and converts each
    word to "Pig Latin." To convert a word to Pig Latin, the first letter
    is removed and placed at the end of the word, then the string "ay" is
    appended to the word. For example:
  
    * English:        I SLEPT MOST OF THE NIGHT
    * Pig Latin:    IAY LEPTSAY OSTMAY FOAY HETAY IGHTNAY */

#include "Utility.h"

/* Asks the user if he or she wants to repeat the process,
    returns the decision */
char tryAgain();

/* Converts each word to pig latin,
   returns the words */
string pigLatin(string);

/* Converts each word to uppercase */
void wordCapitalizer(string &);

/* Removes punctuation from a sentence */
void removePunct(string &);

/* Clears the input of the three string object */
void clearInput(string &, string &, string &);

int main()
{
    char   again = ' ';
    string word;
    string pigSentence;
    string englishSentence;

    cout << "\tPIG LATIN TRANSLATOR\n\n"
          << "\tEnter a sentence, and I will translate it for you "
          << "from English to Pig Latin:\n\t";

    do
    {
        while (cin >> word)
        {      
            englishSentence.append(word + " ");

            removePunct(word);
            wordCapitalizer(word);

            pigSentence.append(pigLatin(word));

            if (cin.get() == '\n')
            {
                cout << "\n\tThis was your original sentence:\n\t"
                      << englishSentence << "\n";

                cout << "\n\tThis is your sentence in Pig Latin:\n\t"
                      << pigSentence;

                break;
            }
        }

        again = tryAgain();

        if (again == 'Y')
        {
            cout << "\n\tPlease enter another sentence:\n\t";

            clearInput(word, pigSentence, englishSentence);
        }      
        else
        {
            cout << "\tHave a nice day!\n\n";
        }
    } while (again == 'Y');

    pauseSystem();
    return 0;
}

/* **********************************************************
   Definition: pigLatin

   This function stores the first letter of each word in a
    variable, then the first letter is erased, and in a final
    step the letter plus "AY " is appended to the word.
   ********************************************************** */

string pigLatin(string word)
{
    string tmp = word.substr(0, 1);
    string pLatin = "AY ";

    word.erase(word.begin());
    word.append(tmp + pLatin);

    return word;
}

/* **********************************************************
   Definition: removePunct

   This function erases all punctuation from the string.
   ********************************************************** */

void removePunct(string &sentence)
{
    for (unsigned int i = 0; i < sentence.length(); i++)
    {
        if (ispunct(sentence.at(i)))
        {
            sentence.erase(i++, 1);
        }
    }
}

/* **********************************************************
   Definition: wordCapitalizer

   This function converts a word to uppercase.
   ********************************************************** */

void wordCapitalizer(string &word)
{
    for (unsigned int index = 0; index < word.length(); index++)
    {
        if (isalpha(word.at(index)))
        {
            word.at(index) = toupper(word.at(index));
        }
    }
}

/* **********************************************************
   Definition: tryAgain

    This function asks the user if he or she wishes to try
    again. This decision is returned.
   ********************************************************** */

char tryAgain()
{
    char again = ' ';

    cout << "\n\n\tDo you wish to try this again? ";
    cin >> again;
    cin.ignore();

    /* Input validation */
    while (toupper(again) != 'Y' && toupper(again) != 'N')
    {
        cout << "\n\tDo you wish to try this again? ";
        cin >> again;
    }

    return toupper(again);
}

/* **********************************************************
   Definition: clearInput

   This function clears the contents in the string objects.
   ********************************************************** */

void clearInput(string &word, string &pigSentence,
                     string &englishSentence)
{
    word.clear();
    pigSentence.clear();
    englishSentence.clear();
}

Example Output: