I'll warn you ahead of time...howework help

I am currently writing a Pig Latin program that simulates the pig latin language. I have gotten the program to read one word and covert it but now I need it to transform an entire sentence and I am stuck. I have no clue where to go from here, I just can't figure out how to read more than one word. Thanks for your help guys!

Code:

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#include <iostream>
#include <string>

using namespace std;

bool isVowel(char ch);
string rotate(string pStr);
string pigLatinString(string pStr);

int main()
{
        string str;
        cout << "Enter a string: ";
        cin >> str;
        cout << endl;

        cout << "The Pig Latin form of " << str << " is: "
                << pigLatinString(str) << endl;

        return 0;
}
bool isVowel(char ch)
{
        switch (ch)
        {
        case 'A': case 'E':
        case 'I': case 'O':
        case 'U': case 'Y':
        case 'a': case 'e':
        case 'i': case 'o':
        case 'u': case 'y': return true;
        default: return false;
        }
}

string rotate(string pStr)
{
        string::size_type len = pStr.length();
       
        string rStr;
       
        rStr = pStr.substr(1, len - 1) + pStr[0];
       
        return rStr;
}

string pigLatinString(string pStr)
{
        string::size_type len;

        bool foundVowel;

        string::size_type counter;

        if (isVowel(pStr[0]))
                pStr = pStr + "-way";
        else
        {
                pStr = pStr + '-';
                pStr = rotate(pStr);
                len = pStr.length();
                foundVowel = false;

                for (counter = 1; counter < len - 1; counter++)
                        if (isVowel(pStr[0]))
                        {
                                foundVowel = true;
                                break;
                        }
                        else
                                pStr = rotate(pStr);

                if (!foundVowel)
                        pStr = pStr.substr(1, len) + "-way";
                else
                        pStr = pStr + "ay";
        }
        return pStr;
}

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>I just can't figure out how to read more than one word.
That's easy, just wrap your input and conversion into a loop:

Code:

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while ( cin>> str )
  cout<< pigLatinString(str) <<' ';

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If you want more control then you'll pretty much need to save the converted words or add a wrapper to pigLatinString that loops over the words in a sentence so that you can use getline.