int getSeconds() {
      cout<< "Enter a number of seconds: " << endl;

      int userInput = 0;
      while( !(cin >>userInput) ) {
          cout<< "Invalid input!" << endl;
          cout<< "Enter a number of seconds: " << endl;
      }

      return userInput;
}

void part2a() {
    int seconds = getSeconds();

    int hours = seconds % 60;
    seconds -= hours * 60;

    int minutes = seconds % 60;
    seconds -= minutes * 60;

    cout<< hours <<" hours " <<minutes <<" minutes and " << seconds << " seconds"<< endl;

}