#include <iostream>
#include <stdio.h>
#include <locale>

/*
 *Author: Matthew Zelenka
 *Projects: ZeldaMProjects5-1.cpp
 *Purpose: Rewrite the Telephone Digits program to accept both upper and lowercase letters.
*/

std::string Telephone(std::string text);

int main(int argc, char *argv)
{
  std::cout << "Please enter a phone number's text: ";
  std::string s;
  std::cin >> s;

  Telephone(s);

  std::cout << "\n\n\nPlease press enter to exit the program.";
  std::cin.sync();
  std::cin.clear();
  std::cin.ignore();
  std::cin.clear();
}

std::string Telephone(std::string text)
{
  //String to be returned.
  std::string phoneNum = " ";
  //Locale.
  std::locale loc;

  try
  {
    for(int i = 0; i < text.length() - 1; i++)
    {
      char c = toupper(text[i]);
      if(isdigit(c, loc))
      {
        if(c >= 'A' && c <= 'C') { std::cout << "2"; }
        else if(c >= 'D' && c <= 'F') { phoneNum += "3"; }
        else if(c >= 'G' && c <= 'I') { phoneNum += "4"; }
        else if(c >= 'J' && c <= 'L') { phoneNum += "5"; }
        else if(c >= 'M' && c <= 'O') { phoneNum += "6"; }
        else if(c >= 'P' && c <= 'R') { phoneNum += "7"; }
        else if(c >= 'S' && c <= 'V') { phoneNum += "8"; }
        else if(c >= 'W' && c <= 'Z') { phoneNum += "9"; }
      }
    }
  }

  catch(...)
  {
    std::cout << "An error occured.";
  }
  cout << "Phone number: " + phoneNum;
  return phoneNum;
}