C++ Hangman Swapping Underscores For Actual Chars - c++

Question

I am developing a Hangman game for an Uni assessment in C++ and I am having trouble displaying my hidden words after the user types a letter. So I have got the word being displayed as '_ _ _ _ _ _ _' but when I type a letter it doesn't swap the underscore for the actual letter.
game::game() {
words[0] = "strongly";
words[1] = "cheese";
words[2] = "computer";
words[3] = "coffee";
words[4] = "potatoes"; //words that can be in the game
words[5] = "zebra";
words[6] = "extinguisher";
words[7] = "solution";
words[8] = "diligent";
words[9] = "flabbergasted";
numGuesses = 0;
hiddenWord = words[rand() % 10]; //pick a random word from array words
completedWord = hiddenWord;
//for loop for changing the word to underscores
for (int i = 0; i < completedWord.length(); i++) {
completedWord[i] = '_';
}
//for loop adding a space after underscore
for (int i = 0; i < completedWord.length(); i++) {
cout << completedWord[i] << " ";
}
cout << endl;
cout << "Please enter a letter: ";
char guessedLetter;
cin >> guessedLetter;
if (guessedLetter = completedWord[0]) {
completedWord = guessedLetter;
//cout << guessedLetter << endl;
cout << completedWord << endl;
}
}
My whole program is separated into different header files and cpp files. So the code above is from my gameguesses.cpp and the header for that is below:
class game {
public:
string words[10];
game();
string hiddenWord;
int numGuesses;
string completedWord;
};
And this is what I actually get:
A help would be appreciated. Thank you!

Answer 1

I see 2 issues:
if (guessedLetter = completedWord[0])
That line needs == not =.
Secondly, you are comparing the guess only to the first letter of the hidden word. You need to write a loop to check each letter and substitute where it matches the guess, not just in element [0].

Answer 2

See if this helps.
#include <iostream>
#include <vector>
#include <string>
#include <stdlib.h>
#include <locale>
using namespace std;
class Game
{
public:
Game()
{
gameDictionary.push_back("strongly");
gameDictionary.push_back("cheese");
gameDictionary.push_back("computer");
gameDictionary.push_back("coffee");
gameDictionary.push_back("potatoes");
gameDictionary.push_back("zebra");
gameDictionary.push_back("extinguisher");
gameDictionary.push_back("solution");
gameDictionary.push_back("diligent");
gameDictionary.push_back("flabbergasted");
}
// Play until winning or losing. Returns true on win, false on loss.
bool playGame()
{
numGoodGuesses = 0;
numBadGuesses = 0;
numWordLettersFound = 0;
hiddenWord = gameDictionary[rand() % gameDictionary.size()]; //pick a random word from array words
guessedWordTracker = hiddenWord;
for (string::size_type i = 0; i < hiddenWord.size(); i++)
{
completedWord += "_ ";
}
for (;;)
{
cout << completedWord << endl;
cout << "Please enter a letter: ";
char guessedLetter;
do
{
cin >> guessedLetter;
guessedLetter = tolower(guessedLetter);
if (!isalpha(guessedLetter))
{
cout << "Invalid letter, try again." << endl;
}
} while (!isalpha(guessedLetter));
string::size_type pos;
int numMatchesFoundThisTime = 0;
while ((pos = guessedWordTracker.find_first_of(guessedLetter)) != string::npos)
{
completedWord[pos * 2] = guessedWordTracker[pos];
guessedWordTracker[pos] = '\x01';
numMatchesFoundThisTime++;
}
numWordLettersFound += numMatchesFoundThisTime;
if (numMatchesFoundThisTime > 0)
{
numGoodGuesses++;
cout << "Wow, you found " << numMatchesFoundThisTime
<< (numMatchesFoundThisTime > 1 ? " letters!" : " letter!")
<< endl;
if (numWordLettersFound == hiddenWord.size())
{
cout << "Congrats... the word is '" << hiddenWord << "' ... great job!" << endl;
return true;
}
}
else
{
numBadGuesses++;
cout << "Sorry, the letter '" << guessedLetter << "' is not in the word." << endl;
}
int totalGuesses = numGoodGuesses + numBadGuesses;
cout << "You've made " << numGoodGuesses << " good guesses, "
<< numBadGuesses << " bad guesses, "
<< totalGuesses << " total guesses." << endl;
// Example failure:
const int BAD_GUESSES_ALLOWED = 30;
if (numBadGuesses > BAD_GUESSES_ALLOWED)
{
cout << "Sorry, you have no more guesses left. You lose." << endl;
return false;
}
}
}
private:
vector<string> gameDictionary;
string hiddenWord;
string guessedWordTracker;
string completedWord;
int numGoodGuesses;
int numBadGuesses;
int numWordLettersFound;
};
int _tmain(int argc, _TCHAR* argv[])
{
Game g;
g.playGame();
return 0;
}