NumberGuessingGame.cpp

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <limits>
#include <string>

using namespace std;

void printHeader(const string& title) {
    cout << "\n";
    cout << "   " << title << "\n";
    cout << "\n";
}

int getValidInt(const string& prompt) {
    int input;
    while (true) {
        cout << prompt;
        if (cin >> input) {
            return input;
        } else {
            cout << "  [!] Invalid input. Please enter a whole number.\n\n";
            cin.clear();
            cin.ignore(numeric_limits<streamsize>::max(), '\n');
        }
    }
}

void playGame() {
    printHeader("NUMBER GUESSING GAME");
    cout << "Choose your difficulty level:\n";
    cout << " 1. Easy   (1 to 50, Unlimited tries)\n";
    cout << " 2. Medium (1 to 100, 10 tries)\n";
    cout << " 3. Hard   (1 to 500, 7 tries)\n\n";

    int choice = 0;
    int maxNumber = 100;
    int maxAttempts = -1; 

    while (true) {
        choice = getValidInt("Enter choice (1-3): ");
        if (choice == 1) { maxNumber = 50; maxAttempts = -1; break; }
        else if (choice == 2) { maxNumber = 100; maxAttempts = 10; break; }
        else if (choice == 3) { maxNumber = 500; maxAttempts = 7; break; }
        else { cout << "  [!] Please enter 1, 2, or 3.\n\n"; }
    }

    int targetNumber = rand() % maxNumber + 1;
    int attempts = 0;
    int guess = 0;

    printHeader("GAME STARTED");
    cout << "I have chosen a number between 1 and " << maxNumber << ".\n";
    if (maxAttempts != -1) {
        cout << "You have " << maxAttempts << " attempts to guess it. Good luck!\n";
    }
    cout << "\n";

    while (true) {
        guess = getValidInt("Enter your guess: ");
        attempts++;

        if (guess == targetNumber) {
            cout << "\n  >>> BINGO! <<<\n";
            cout << "  You guessed the number in " << attempts << " attempts!\n";
            break;
        } else if (guess < targetNumber) {
            cout << "  -- Too low! Try a higher number.\n";
        } else {
            cout << "  ++ Too high! Try a lower number.\n";
        }

        if (maxAttempts != -1 && attempts >= maxAttempts) {
            cout << "\n  >>> GAME OVER! <<<\n";
            cout << "  You've run out of attempts.\n";
            cout << "  The correct number was: " << targetNumber << "\n";
            break;
        }

        if (maxAttempts != -1) {
            cout << "  (Attempts remaining: " << maxAttempts - attempts << ")\n";
        }
        cout << "\n";
    }
}

int main() {
    srand(static_cast<unsigned int>(time(0))); 
    
    char playAgain = 'y';

    while (tolower(playAgain) == 'y') {
        playGame();
        
        cout << "\n";
        cout << "Would you like to play again? (y/n): ";
        cin >> playAgain;
        
        cin.clear();
        cin.ignore(numeric_limits<streamsize>::max(), '\n');
    }

    cout << "\nThanks for playing! Goodbye.\n";
    return 0;
}