hangman.cpp

#include<conio.h>
#include <iostream>
#include <cstdlib>
#include <vector>
#include <algorithm>
#include <ctime>
#include<limits>
using namespace std;
void game(vector<string> wordlist, int lives);
void rules();
void displayHangman(int lives);
void easy();
void medium(); 
void hard();
int main() 
{
    srand(time(0));
    int b;
    char choice;
    cout << "Welcome to Hangman! Press any key to start" << endl;
    getch();
    cout << "" << endl;
    do{
    cout << "If you want to see the rules, press 4" << endl;
    cout<<endl;
    do {
        cout << "Please select the difficulty level: " << endl;
        cout << "1: Easy" << endl;
        cout << "2: Medium" << endl;
        cout << "3: Hard : ";
        cin >> b;
         cout<<"\n";
        if (cin.fail() || (b < 1 || b > 4)) {
        cout << "Invalid input! Please enter a number between 1 and 4." << endl;
        cin.clear();             
        cin.ignore(numeric_limits<streamsize>::max(), '\n'); 
        continue;
        }
        if (b == 4) {
            rules(); 
            cout << "Now, let's start the game!" << endl;
        }

    } while (b != 1 && b != 2 && b != 3); 
    switch (b) {
        case 1:
            easy();
            break;
        case 2:
            medium();
            break;
        case 3:
            hard();
            break;
        default:
            cout << "Invalid choice" << endl;
            break;
    }
    cout << "Do you want to play again? (y/n): ";
        cin >> choice;
        cout << endl;

    } while (choice == 'y' || choice == 'Y');

    cout << "Thanks for playing Hangman! Goodbye!" << endl;
    return 0;
}
void game(vector<string> wordlist, int lives) 
{ 
    string choose = wordlist[rand() % wordlist.size()];
    string display(choose.length(), '_');
    char guess;
    vector<char> guessedLetters;
    cout<<" "<<endl;
    cout << "The game begins. You have " << lives << " lives. Now guess the word: " << endl;

    while (display != choose && lives > 0) 
	{
        cout << "Word: ";
        for (size_t i = 0; i < display.length(); ++i) {
            cout << display[i];
            if (i < display.length() - 1) cout << " ";  
        }
        cout << "Lives left: " << lives << endl;
        displayHangman(lives);

        cout << "Enter your guess: ";
        cin >> guess;

        if (find(guessedLetters.begin(), guessedLetters.end(), guess) != guessedLetters.end()) {
            cout << "You already guessed '" << guess << "'. Try a different letter." << endl;
            continue;
        }

        guessedLetters.push_back(guess);

        bool correctGuess = false;                          
        for (size_t i = 0; i < choose.length(); ++i) {
            if (choose[i] == guess) {
                display[i] = guess;  
                correctGuess = true;
            }
        }

        if (!correctGuess) {
            --lives;
            cout << "\nIncorrect guess! You have " << lives << " lives left." << endl;
        }

        if (display == choose) {
            cout << "Congratulations! You guessed the word: " << choose << endl;
        } else if (lives == 0) {
            cout << "You lose! The word was: " << choose << endl;
            displayHangman(0);
        }
    }
}
void rules() 
{
    cout << "You have certain lives to guess the word" << endl;
    cout << "If your guess is wrong, one life will be deducted." << endl;
    cout << "You have categories in each difficulty level. Choose a category to start." << endl;
    cout << "Guess the letters (a-z) to form the word!" << endl;
    cout<<"Please give letter in lower case.";
    cout<<endl;
    cout<<endl;
}
void displayHangman(int lives) 
{
    cout << "  _______" << endl;
    cout << "  |     |" << endl;
    if (lives <= 4) cout << "  O     |" << endl;
    else cout << "        |" << endl;
    if (lives == 4) cout << "  |     |" << endl;
    else if (lives == 3) cout << " /|     |" << endl;
    else if (lives <= 2) cout << " /|\\    |" << endl;
    else cout << "        |" << endl;
    if (lives == 1) cout << " /      |" << endl;
    else if (lives == 0) cout << " / \\    |" << endl;
    else cout << "        |" << endl;

    cout << "        |" << endl;
    cout << "=========" << endl;
}
void easy() 
{
    int choice;
    cout << "For easy mode, you have 3 categories:" << endl;
    cout << "1: Animal" << endl;
    cout << "2: Nature" << endl;
    cout << "3: Fruits" << endl;
    do {
        cout << " Which category would you like to select? ";
        cin >> choice;
        if (cin.fail() || (choice < 1 || choice > 4)) {
        cout << "Invalid input! Please enter a number between 1 and 4." << endl;
        cin.clear();             
        cin.ignore(numeric_limits<streamsize>::max(), '\n'); 
        continue;}

        if (choice == 1) {
            vector<string> Animal = {"cat", "dog", "bear", "fly", "fish", "lion", "frog"};
            game(Animal, 5);
        }
        else if (choice == 2) {
            vector<string> Nature = {"tree", "river", "sun", "cloud", "grass", "rock"};
            game(Nature, 5);
        }
        else if (choice == 3) {
            vector<string> Fruits = {"apple", "mango", "berry", "strawberry", "grapes", "orange"};
            game(Fruits, 5);
        }
        else {
            cout << "Invalid category choice. Please enter 1, 2, or 3." << endl;
        }
    } while (choice != 1 && choice != 2 && choice != 3);
}

void medium() 
{
    int choice;
    cout << "For medium mode, you have 3 categories:" << endl;
    cout << "1: Animal" << endl;
    cout << "2: Cities" << endl;
    cout << "3: Fruits" << endl;
    do {
        cout << "Which category would you like to select? ";
        cin >> choice;
       
         if (cin.fail() || (choice < 1 || choice > 4)) {
        cout << "Invalid input! Please enter a number between 1 and 4." << endl;
        cin.clear();             
        cin.ignore(numeric_limits<streamsize>::max(), '\n'); 
        continue;}

        if (choice == 1) {
            vector<string> Animal = {"kangaroo", "elephant", "ostrich", "giraffe", "gorilla", "koala"};
            game(Animal, 5);
        }
        else if (choice == 2) {
            vector<string> Cities = {"barcelona", "sydney", "mumbai", "karachi"};
            game(Cities, 5);
        }
        else if (choice == 3) {
            vector<string> Fruits = {"papaya", "kiwi", "guava", "dragonfruit", "apricot"};
            game(Fruits, 5);
        }
        else {
            cout << "Invalid category choice. Please enter 1, 2, or 3." << endl;
        }
    } while (choice != 1 && choice != 2 && choice != 3);
}

void hard() 
 {
    int choice;
    cout << "For hard mode, you have 3 categories:" << endl;
    cout << "1: Countries" << endl;
    cout << "2: Space" << endl;
    cout << "3: Sports" << endl;
    do {
        cout << "Which category would you like to select? ";
        cin >> choice;
        
         if (cin.fail() || (choice < 1 || choice > 4)) {
        cout << "Invalid input! Please enter a number between 1 and 4." << endl;
        cin.clear();             
        cin.ignore(numeric_limits<streamsize>::max(), '\n'); 
        continue;}
        if (choice == 1) {
            vector<string> Countries = {"spain", "england", "newzealand", "australia", "afghanistan", "india"};
            game(Countries, 5);
        }
        else if (choice == 2) {
            vector<string> Space = {"blackhole", "jupiter", "darkmatter", "hypernova"};
            game(Space, 5);
        }
        else if (choice == 3) {
            vector<string> Sports = {"volleyball", "badminton", "cricket", "judo"};
            game(Sports, 5);
        }
        else {
            cout << "Invalid category choice. Please enter 1, 2, or 3." << endl;
        }
    } while (choice != 1 && choice != 2 && choice != 3);
}