C++ 1 user login system

/***************************************
 SINGLE USER LOGIN SYSTEM
 By Jacob Blair
 ***************************************/

#include <iostream>

using namespace std;

int
main ()
{
  string mypass = "";
  string myemail = "";
  string epass = "";
  string email = "";
  bool reg = false;
  int ch = 0;
  int hom = 0;
  hom = 1;
  while (hom == 1)
    {
      hom = 0;
      cout << "Would you like to login or register? (1/2)\n";
      cin >> ch;
      if (ch == 2 && mypass == "" && myemail == "")
    {
      cout << "Thank you for registering with us!\n\n";
      cout << "Please enter your email\n";
      cin >> myemail;
      cout << "Email registered\nPlease enter a password\n";
      cin >> mypass;
      cout << "Successfully registered!\n";
      hom = 1;

    }
      else if (ch == 2 && mypass != "")
    {
      cout << "Already registered!\n";
      hom = 1;
    }
      else if (ch == 2 && myemail != "")
    {
      cout << "Already registered!\n";
      hom = 1;
    }
      else if (ch == 1 && mypass != "" && myemail != "")
    {
      cout << "Enter password\n";
      cin >> epass;
      if (epass != mypass)
        {
          cout << "Invalid password\n";
          hom = 1;
        }
      else
        {
          cout << "Enter email\n";
          cin >> email;
          if (email != myemail)
        {
          cout << "Invalid email\n";
          hom = 1;
        }
          else
        {
          if (epass == mypass && email == myemail)
            {
              cout << " Successfully logged in ! ";

            }
          else
            {
              cout << " Incorrect login.";
            }
        }
        }
    }
      else if (ch == 1 && mypass == " ")
    {
      cout << " Not registered ! \n ";
      hom = 1;
    }

      else if (ch == 1 && myemail == " ")
    {
      cout << " Not registered ! \n ";
      hom = 1;

    }
    else {
        cout << " Invalid option. \n ";
        hom = 1;
    }
    }

}