Also added new conditional check for whether the user guess is invalid

main.cpp

@@ -20,7 +20,7 @@ int main(int argc, char *argv[])
 		std::cout << "What's your guess (max= " << parameters.max_range <<"): ";
 		std::cin >> user_guess;
 		
-		while (std::cin.fail() || user_guess < 0)
+		while (std::cin.fail() || user_guess < 0 || user_guess > parameters.max_range)
 		{
 			std::cin.clear();