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blackjack c++

jersbol (4)
I am a beginner and taking a required engineering program class. I am having difficulty understanding and putting these codes together correctly to make the blackjack program work. Any help would be greatly appreciated!!!!

// Blackjack.cpp : Defines the entry point for the console application.
//

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>

char CreateMainMenu();
int GetRandomCard();
void PlayGame();
void Initialize();
void PrintCard(int card);
void ShowCards();
int CalculatePoint(int cards[], int count);

char cardSuits[][15]={ {"Clubs"}, {"Diamond"}, {"Spades"}, {"Hearts"} } ;
const int MAXHAND=20;
int playerCards[MAXHAND];
int playerCardCount=0;
bool playerStand;
int playerPoint;
float playerMoney;
float bet;

int dealerCards[MAXHAND];
int dealerCardCount=0;
int dealerPoint;

// main fuction
int main(void)

char CreateMainMenu()
{
printf("=========== Blackjack ============\r\n");
printf(" 1. Play \r\n");
printf(" 2. Exit \r\n");
printf(" Your Choice (1/2): ");
char choice;
scanf("%c",&choice);
_flushall();
return choice;


/* initialize random seed: */
srand ( time(NULL) );
char choice = CreateMainMenu();
int suit, card;
if (choice=='1')
{
PlayGame();
}
if (choice =='2')
{
printf("Exit Game. ");
}
else
{
printf("Invalid input");
}
return 0;
}

void PlayGame()
{
char choice;
playerMoney=100.0;

do
{
Initialize();
printf("How much do you want to bet (max: $%.2f): $", playerMoney);
scanf("%f", &bet);
_flushall();

/* Dealer gets two cards */
dealerCards[dealerCardCount++]=GetRandomCard();
dealerCards[dealerCardCount++]=GetRandomCard();


/* Player gets two cards */
playerCards[playerCardCount++]=GetRandomCard();
playerCards[playerCardCount++]=GetRandomCard();

ShowCards();
choice=0;
int newCard;
while((playerPoint<21)&&(choice!='S'))
{
printf("Do you want to Hit or Stand?(H/S) ");
_flushall();
if (choice=='H')
{
}

printf("Your point is: %i\r\n", playerPoint);
}
playerStand=true;

if (playerPoint<=21)
{
printf("Dealer's point is: %i\r\n", dealerPoint);
while(dealerPoint<17)
{
printf("Dealer's point is: %i\r\n", dealerPoint);
}
}

printf("\r\n\r\n");
ShowCards();
if (dealerPoint = 21)
{
printf("You lost the bet!");
playerMoney-=bet;
}
else if(playerPoint == dealerPoint) {
printf("Its a draw, you will keep your bet.");
}
else if(playerPoint = 21) {
printf("Congratulations! You got a Blackjack, you won 1.5x of your bet");
playerMoney+= (bet*1.5);
}
else if(playerPoint > 21) {
printf("You lost the best!");
playerMoney-=bet;
}
else
{
printf("You won your bet!");
playerMoney+=bet;
}
printf("\r\n");
printf("You have $%.2f\r\n", playerMoney);
printf("Continue...?(Y/N) ");
scanf("%c", &choice);
_flushall();
}
while(choice!='N');
}



void PrintCard(int card)
{
int value=(card%13)+1;
if ((value>1)&&(value<=10))
{
printf("Card: %i ", value);
}
else
{
printf("Card: ");
switch(value)
{
case 1:
printf("Ace ");
break;
case 11:
printf("Jack ");
break;
case 12:
printf("Queen ");
break;
case 13:
printf("King ");
break;
};
}
printf("of %s\r\n", cardSuits[(int)floor(card/13.0)]);
}
int GetRandomCard() {
return (rand() % 52)+1;
}
void Initialize()
{
dealerCardCount=0;
playerCardCount=0;
playerStand=false;
playerPoint=0;
dealerPoint=0;
bet=0;
for(int i=0; i<MAXHAND; i++)
{
playerCards[i]=0;
dealerCards[i]=0;
}
}
int CalculatePoint(int cards[], int count) {
int points = 0;
int aces=0;
int faceValue;
for(int i=0; i<count; i++) {
faceValue = (cards[i] % 13) + 1;
if (faceValue==1) {
aces++;
}
else {
if (faceValue>10) faceValue=10;
points += faceValue;
}
}

for(int i=0; i<aces; i++) {
if (points+11<=21) {
points+=11;
}
else {
points++;
}
}

return points;
}
void ShowCards() {
if (playerStand) {
printf("Dealer has following - \r\n");
for(int i=0; i<dealerCardCount; i++) {
PrintCard(dealerCards[i]);
}
dealerPoint = CalculatePoint(dealerCards, dealerCardCount);
printf("Dealers total point is: %i\r\n", dealerPoint);
}
else {
printf("Dealer has %i cards, facedown.\r\n", dealerCardCount);
}
printf("\r\n");
printf("You have following - \r\n");
for(int i=0; i<playerCardCount; i++) {
PrintCard(playerCards[i]);
}
playerPoint = CalculatePoint(playerCards, playerCardCount);
printf("Your total point is: %i\r\n", playerPoint);
IceThatJaw (529)
What you have there is C, not C++.

As it happens, I had to code a game in a client server scenario. For some reason, I thought of BlackJack as my game of choice.

This code I will present has no intelligent AI whatsoever but it might help you so I will post it. The actual game part was only half the battle so I coded it rather quickly. I haven't even tested it but I imagine it works well since the STD is so forgiving compared to straight C. I might be missing a few scenarios but it that's that.

You should post your code inside the <> button or the tags if you want to be taken seriously though.

*In retrospect, I did this within an hour and I don;t even type fast so just take bits and pieces from it. 


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enum Suit { CLUBS, HEARTS, DIAMONDS, SPADES };
enum Rank { ONE = 1, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN, JACK, QUEEN, KING, ACE };
enum Who  { PLAYER, DEALER };

struct Card 
{
	Suit suit;	
	Rank rank;
};

class BlackJack
{
	public:
	BlackJack()  
	{
	 	srand ( time(NULL) );
		playerScore = 0;
	 	dealerScore = 0;
		playerBust = false;
		dealerBust = false;

		Card tmpCard;
		for (int i = CLUBS; i < SPADES; i++)
			for (int j = ONE; j <= ACE; j++)
			{				
				tmpCard.suit = (Suit)i;
				tmpCard.rank = (Rank)j;			
				deck.push_back(tmpCard);
			}
	}	

	void ShuffleDeck() { random_shuffle(deck.begin(), deck.end()); }
	
	void Play()
	{
		bool hitMe;
		cout << "\nGame starting....\n\n";
		
		while(1)
		{	
			cout << "\nRound starting...\n\n";
			hitMe = Deal(GetCard(PLAYER), PLAYER);
			Deal(GetCard(DEALER), DEALER);
			
			while (hitMe)
			{
				hitMe = Deal(GetCard(PLAYER), PLAYER);
				Deal(GetCard(DEALER), DEALER);
			}
					
			if (playerScore > 21)
			{			
				cout << "\nYou bust!!\n";
				playerBust = true;
			}
			else if (dealerScore > 21)
			{
				cout << "\nDealer busts!!\n";			
				dealerBust = true;
			}
			else
			{
				cout << "\nYou stand at " << playerScore << endl;
				cout << "The dealer stands at " << dealerScore << endl; 
			}			

			if (playerScore > dealerScore and !playerBust)
				cout << "\nYou win!!!\n\n";
			else if (playerScore == dealerScore or !playerBust and !dealerBust)
				cout << "\nTie!!! Dealer wins!!!\n\n";
			else
				cout << "\nDealer wins!!!\n\n";			
		}
	}

	Card GetCard(Who w)
	{
		Card tmpCard;
		if (deck.size() != 0)
		{
			tmpCard = deck[deck.size()-1];
			AddScore(tmpCard, w);
			deck.pop_back();
		}
		else
		{
			cout << "\nDealer has run out of cards. Game Over....\n\n";
			exit(1);
		}

		return tmpCard;
	}

	void AddScore(Card c, Who w)
	{
		bool faceCard = false;
		int faceValue = 0;
		
		switch(c.rank)
		{
			case JACK  :
			case QUEEN :
			case KING  : faceValue = 10;
					     faceCard = true;  
				break;
			case ACE   : faceValue = 11;
					     faceCard = true;
		}
		
		switch (w)
		{
			case PLAYER :	if (faceCard)
								playerScore += faceValue;
							else 
								playerScore += c.rank; 
				break;
		 	case DEALER :  if (faceCard)
								dealerScore += faceValue;
							else 
								dealerScore += c.rank;
		}		
	}
	
	bool Deal(Card c, Who w)
	{
		if (w == PLAYER)
		{
			char answer;
			do
			{
				cout << "\nYou have been dealt a" << RankToString(c.rank) << "of" << SuitToString(c.suit) << endl;
				cout << "You stand at " << playerScore << endl;
				cout << "\nHit you? (Type Y or N or Q to quit)\n"; 			
				cin  >>	answer;
				answer = toupper(answer);		
			}	
			while (answer != 'Y' and answer != 'N' and answer != 'Q');
		
			switch (answer)
			{
				case 'Y' : return true;
	 				break;
				case 'N' : return false;
					break;
				case 'Q' : cout << "Exiting game....\n"; 
                           exit(1);
			
				return false;
			}
		}
		else
		{
			cout << "\nDealer takes a" << RankToString(c.rank)<< "of" << SuitToString(c.suit) << endl;
			cout << "Dealer stands at " << dealerScore << endl;	
		}
	}

	string SuitToString(Suit s)
	{
		switch(s)
		{
			case CLUBS    : return " clubs ";
			case HEARTS   : return " hearts ";
			case DIAMONDS : return " diamonds ";
			case SPADES   : return " spades ";
		}
	}
	
	string RankToString(Rank r)
	{
		switch(r)
		{
			case ONE   : return " one ";
			case TWO   : return " two ";
			case THREE : return " three ";
			case FOUR  : return " four ";
			case FIVE  : return " five ";
			case SIX   : return " six ";
			case SEVEN : return " seven ";
			case EIGHT : return " eight ";
			case NINE  : return " nine ";
			case TEN   : return " ten ";
			case JACK  : return " jack ";
			case QUEEN : return " queen ";
			case KING  : return " king ";
			case ACE   : return " ace ";
		}
	}

	private:
	vector<Card> deck;	
	bool playerBust;
	bool dealerBust;
	int playerScore;
	int dealerScore;
};

int main() 
{
	BlackJack game;
	game.ShuffleDeck();
	game.Play();
Last edited on
jersbol (4)
The blackjack program starts but then gets stuck in the while-loop where it asks you to hit or stay. It then doesn't add the new random card. It just repeats over and over. As a beginner, it is really frustrating. Any help/hints or whatever would be greatly appreciated.

thanks!



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// blackjack21.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"



#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>

char CreateMainMenu();
int GetRandomCard();
void PlayGame();
void Initialize();
void PrintCard(int card);
void ShowCards();
int CalculatePoint(int cards[], int count);

char cardSuits[][15]={ {"Clubs"}, {"Diamond"}, {"Spades"}, {"Hearts"} } ;
const int MAXHAND=20;
int playerCards[MAXHAND];
int playerCardCount=0;
bool playerStand;
int playerPoint;
float playerMoney;
float bet;

int dealerCards[MAXHAND];
int dealerCardCount=0;
int dealerPoint;

int main(void)
{
	/* initialize random seed: */
	srand ( time(NULL) );
	char choice = CreateMainMenu();
	int suit, card;
	if (choice=='1') 
	{
		PlayGame();
	}
	return 0;
}

char CreateMainMenu() {
	printf("=========== Blackjack ============\r\n");
	printf(" 1. Play Game: \r\n");
	printf(" 2. Exit Game: \r\n");
	printf(" Your Choice (1/2): ");
	char choice;
	scanf("%c",&choice);
	_flushall();
	return choice;
}

void Initialize() {
	dealerCardCount=0;
	playerCardCount=0;
	playerStand=false;
	playerPoint=0;
	dealerPoint=0;	
	bet=0;
	for(int i=0; i<MAXHAND; i++) {
		playerCards[i]=0;
		dealerCards[i]=0;
	}
}

int GetRandomCard() {
	return (rand() % 52)+1;
}

void PlayGame() 
{
	char choice;
	playerMoney=100.0;

	do 
	{	
		Initialize();
		printf("How much do you want to bet (max: $%.2f): $", playerMoney);
		scanf("%f", &bet);
		_flushall();

		/* Dealer gets two cards */
		dealerCards[dealerCardCount++]=GetRandomCard();
		dealerCards[dealerCardCount++]=GetRandomCard();


		/* Player gets two cards */
		playerCards[playerCardCount++]=GetRandomCard();
		playerCards[playerCardCount++]=GetRandomCard();

		ShowCards();
		choice=0;
		int newCard;
		while((playerPoint<21)&&(choice!='S')||(choice!='s'))
		{
			printf("Do you want to Hit or Stand?(H/S) ");
			scanf("%c", &choice);
			_flushall();
			if ((choice=='H')|| (choice=='h')) 
			{
				playerCards[playerCardCount++]=GetRandomCard();
				++playerCardCount++;			 
			printf("Your point is: %i\r\n",playerPoint);
			}
			else if((choice=='S')||(choice=='s'))
			{
				printf("You have chosen to stay. Wise!", playerPoint);
				playerStand=false;
			}
			else
			{
				printf("Invalid Entry!");
			}
			int playerScore=CalculatePoint(int cards[], int count) 
			 
		}
		playerStand=true;

		if (playerScore<=21) {
			printf("Dealer's point is: %i\r\n", dealerPoint);
			while(dealerPoint<17) {
				printf("Dealer's point is: %i\r\n", dealerPoint);
			}
		}
		printf("\r\n\r\n");
		ShowCards();	
		if (dealerPoint=21) {
			printf("Bummer, you lost the bet!");
			playerMoney-=bet;
		}
		else if(dealerPoint=playerScore) {
			printf("Its a draw, you will keep your bet.");
		}
		else if(playerScore=21) {
			printf("Congratulations! Your Awesome! You got a Blackjack and won 1.5x of your bet");
			playerMoney+= (bet*1.5);
		}
		else if(playerScore>21) {
			printf("Just not your day, you lost the best! Better luck next time!");
			playerMoney-=bet;
		}
		else {
			printf("You won your bet!");
			playerMoney+=bet;
		}
		printf("\r\n");
		printf("You have $%.2f\r\n", playerMoney);
		printf("Continue...?(Y/N) ");
		scanf("%c", &choice);
		_flushall();
	}
	while(choice!='N');
	
}

int CalculatePoint(int cards[], int count) {
	int points = 0;
	int aces=0;
	int faceValue;
	for(int i=0; i<count; i++) {
		faceValue = (cards[i] % 13) + 1;
		if (faceValue==1) {
			aces++;
		}
		else {
			if (faceValue>10) faceValue=10;
			points += faceValue;
		}
	}

	for(int i=0; i<aces; i++) {
		if (points+11<=21) {
			points+=11;
		}
		else {
			points++;
		}
	}

	return points;
}

void PrintCard(int card) {
	int value=(card%13)+1;
	if ((value>1)&&(value<=10)) {
	 printf("Card: %i ", value);
	}
	else {
		printf("Card: ");
		switch(value) {
			case 1: 
				printf("Ace ");
				break;
			case 11:
				printf("Jack ");
				break;
			case 12:
				printf("Queen ");
				break;
			case 13:
				printf("King ");
				break;
		};
	}
	printf("of %s\r\n", cardSuits[(int)floor(card/13.0)]);
}

void ShowCards() {
	if (playerStand) {
		printf("Dealer has following - \r\n");
		for(int i=0; i<dealerCardCount; i++) {
			PrintCard(dealerCards[i]);
		}
		dealerPoint = CalculatePoint(dealerCards, dealerCardCount);
		printf("Dealers total point is: %i\r\n", dealerPoint);
	}
	else {
		printf("Dealer has %i cards, facedown.\r\n", dealerCardCount);
	}
	printf("\r\n");
	printf("You have following - \r\n");
	for(int i=0; i<playerCardCount; i++) {
		PrintCard(playerCards[i]);
	}
	playerPoint = CalculatePoint(playerCards, playerCardCount);
	printf("Your total point is: %i\r\n", playerPoint);
}
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