Simple program that prints out the number of letters, vowels and consonants in a word.

simple_word.cpp

#include <iostream>
#include <string>

using namespace std;

int main() {

  int vowel;
  bool space = true;
  string word;
  cout << "Enter a word (do not use numbers or special characters): ";

  while(space) {
    vowel = 0;
    getline(cin, word);
    for (int i = 0; i < word.size(); i++) {
      if (word[i] < 'a' || word[i] > 'z') {
        space = true;
        cout << "Please enter without a number, special character and space: ";
        break;
      }
      else {
        space = false;
        if (word[i] == 'a' || word[i] == 'e' || word[i] == 'i' || word[i] == 'o' || word[i] == 'u')
          vowel++;
      }
    }
  }

  cout << word << " is " << word.size() << " letters." << endl;
  cout << word << " contains " << vowel << " vowels and " << word.size()-vowel << " consonants." << endl;

  return 0;
}