After:

// Playing a guessing game
void playGame()
{
   declareWinner( userGuess(),  computerGuess() );
}

int userGuess()
{
   // Variable declarations
   int guess;
   
   // Have the user guess a number 1-99
   cout << "Enter your guess of the number (1-99)" << endl;
   cin >> guess;

   // Have the computer randomly generate a number and decide the winner
   return guess;
}

int computerGuess()
{
   // Computer generates a random number (1-99)
   int computerGuess = rand() % 99 + 1;

   return computerGuess;
}

void declareWinner( int userGuess, int computerGuess )
{
   if( userGuess == computerGuess )
      cout << "You guessed correctly" << endl;
   else
      cout << "Sorry, your guess was incorrect" << endl;
}