Hangman

//
//  HangmanGame.cpp
//  Assignment2Project1
//
//  Created by Hayden Lueck on 2015-01-29.
//  Copyright (c) 2015 Hayden Lueck. All rights reserved.
//
//  Create a hangman game that allows the user to input word, and amount of guesses before the game begins
//

#include <iostream>
#include <string>

using namespace std;

/** FUNCTION PROTOTYPES **/
void hangmanGame();
void getWordAndGuesses(string&, int&);

int main() {
    hangmanGame(); //call to hangman game function
    return 0;
}

void hangmanGame()
{
    /** VARIABLE DECLARATIONS **/
    string userWord, solution ="", lettersGuessed = ""; //strings for storing full word, and for displaying current guess
    int guesses, counter = 0, length; //amount of guesses for game, counter for loop, length of word
    char guess = '\0'; //current guess made by user playing
    bool correctGuess = false, alreadyGuessed = false; //booleans for if a guess is correct or not, and to check if new guess was given

    getWordAndGuesses(userWord, guesses); //get word to be guessed, as well as amount of guesses
    length = int(userWord.length()); //set length equal to amount of characters the word has

    for(int i = 0; i < length; i++){ //go through loop as many times as the word has characters
        solution += '*'; //create a string of asterisks the length of the word to be guessed
    }


    /** BEGIN MAIN GAME LOOP **/
    while(counter < guesses) // (should never be false since game exits through breaks, but if something goes wrong somehow this is here to prevent infinite looping)
    {
        do{
            cout << "Guess a letter (you have " << guesses - counter << " tries left): "; //display remaining guesses
            cin >> guess; //get next guess from user
            alreadyGuessed = false; //set boolean flag for if the letter was already guessed to false
            for(int i = 0; i < lettersGuessed.length(); i++) //for the amount of unique letters guessed
            {
                if(lettersGuessed[i] == guess) //if a letter already guessed is equal to the current guess
                {
                    cout << "'" << guess << "' has already been used. Try again" << endl; //prompt user to guess new letter
                    alreadyGuessed = true; //set flag to true to make loop go through again
                }
            }
        }while(alreadyGuessed); //while the user guesses letters already guessed

        /** SCAN WORD FOR CORRECT LETTERS **/
        for(int i = 0; i < length; i++) //go through loop once for every letter in the word
        {
            if(userWord[i] == guess) //if current letter in word is the same as the user's guess
            {
                correctGuess = true; //set boolean flag for a correct guess to true
                solution[i] = guess; //change asterisk at that point in the word to the guessed character
            }
        }

        if(correctGuess) //if the guess was correct
        {
            if(solution == userWord) //if user has guessed all of the contained letters
            {
                cout << "You win!" << endl << "The word was: " << userWord << endl; //tell user they won, show them full word
                break; //break from main loop
            }
            cout << "Right! "; //tell user they are correct
        }
        else if(counter == guesses - 1) //if user isn't correct, and it was their last guess
        {
            cout << "You lose!" << endl << "The word was: " << userWord << endl; //tell user they lost, reveal word to them
            break; //break from main loop
        }
        else //user was incorrect, but they have more guesses
        {
            cout << "Wrong! Try again. "; //prompt to try again
        }

        cout << "Word so far: " << solution << endl; //display word with current guesses

        lettersGuessed += guess; //add letter to string of letters guessed
        correctGuess = false; //set boolean flag for correct guess back to false (default)
        counter++; //increment counter
    }
    /** END MAIN GAME LOOP **/
}

void getWordAndGuesses(string& word, int& guesses)
{
    cout << "Enter the word to be guessed: "; //prompt for word
    cin >> word; //get word from user
    cout << "Enter the max number of tries: "; //prompt for amoun of guesses
    cin >> guesses; //get amount of guesses from user
}