Four (C++ translation)

#include <iostream>
#include <string>

using namespace std;

string words[] = {
    "Zero",
    "One",
    "Two",
    "Three",
    "Four",
    "Five",
    "Six",
    "Seven",
    "Eight",
    "Nine",
    "Ten",
    "Eleven",
    "Twelve",
    "Thirteen",
    "Fourteen",
    "Fifteen",
    "Sixteen",
    "Seventeen",
    "Eighteen",
    "Nineteen",
    "Twenty",
    "Twentyone",
    "Twentytwo",
    "Twentythree",
    "Twentyfour",
    "Twentyfive",
    "Twentysix",
    "Twentyseven",
    "Twentyeight",
    "Twentynine",
    "Thirty",
    "Thirtyone",
    "Thirtytwo",
    "Thirtythree",
    "Thirtyfour",
    "Thirtyfive",
    "Thirtysix",
    "Thirtyseven",
    "Thirtyeight",
    "Thirtynine",
    "Forty",
    "Fortyone",
    "Fortytwo",
    "Fortythree",
    "Fortyfour",
    "Fortyfive",
    "Fortysix",
    "Fortyseven",
    "Fortyeight",
    "Fortynine",
    "Fifty"
};

int maxNumber = sizeof(words) / sizeof(words[0]) - 1;

string numToStr(int num)
{
    return words[num];
}

int main()
{
    int theNum = 0;

    do
    {
        cout << "Input a number between 0 and " << maxNumber << endl;
        cin >> theNum;
    } while (theNum < 0 || theNum > maxNumber);

    while (theNum != 4)
    {
        int temp = numToStr(theNum).length();
        cout << numToStr(theNum) << " is " << numToStr(temp) << endl;
        theNum = temp;
    };

    cout << "Four is the magic number" << endl;

    return 0;
};