Added check to ensure accuracy is always positive

main.cpp

@@ -32,6 +32,7 @@ int main(int argc, char *argv[])
 		correct_guesses.emplace_back(num);
 
 		accuracy -= abs(user_guess - num) / 100.;
+		accuracy = accuracy > 0 : -accuracy;
 		num = gen.get_next_num();
 	}