#include <iostream>
#include <vector>
#include <string>
#include <stddef.h>
#include <exception>
#include <cctype>

int main()
{
    std::vector<std::string> words;
    std::string someword;
    std::string const end_input("end");
    int totallength(0);
    int average(0);
    int vowel(0);
    int con(0);
    int ratiocon(0);
    int ratiovowel(0);
    bool reject = false;
    try
    {
        do
        {
            std::cout << "Input a word: ('end') to exit\n";
            std::cin >> someword;
            for (size_t index(0); index < someword.length() && not reject; index++)
            {
                if (isalpha(someword[index]))
                    continue;
                else
                    reject = true;
            }

            if (reject) throw std::exception();
            if ( someword != end_input )
            {
                words.push_back(someword);
                totallength += someword.length();
                average = totallength / words.size();

                for (size_t index(0); index != someword.length(); ++index)
                {
                    char c(0);
                    c = someword[index];
                    switch (c)
                    {
                    case 'a':
                    case 'e':
                    case 'i':
                    case 'o':
                    case 'u':
                        ++vowel;
                        break;
                    default:
                        ++con;
                    }
                }
            }
            else
                break;
        }
        while (true);

        std::cout << "Average length of these words is " << average << '\n';
        std::cout << "There are " << vowel << " vowels and " << con << " consonants\n";

        int m(vowel);
        int n(con);
        int r(0);
        int gcd(0);
        do
        {
            r = m % n;
            if (r==0)
            {
                gcd = n;
                break;
            }
            m = n;
            n = r;
        }
        while (true);

        ratiovowel = vowel/gcd;
        ratiocon = con/gcd;
        std::cout << "The ratio of vowels to consonants is " << ratiovowel << ":" << ratiocon << '\n';
    }

    catch (...)
    {
        std::cerr << "***An Exception was thrown***\n";
    }
}