BlackJack help

[Yom]

Hello,

I need some help. I am in a C++ class and we need to build a blackjack game. The professor provided some code for us to fill in the blanks. I just can't get my head around a piece of it. I'll try to post the whole thing, but may not be space.

#include <iostream>
#include <iomanip>
#include <windows.h>

using namespace std;

int main(void)
 {
	bool bPlayerDraw[5] = {0};      //Boolean to determine if player holds (F)
             //or draws card (T)
	char cPlay = 'N';       //Character variable for play game input
	char cCardDeck[4][13];     //Character array representing the card deck
	int iCard [13] = {0};         //Card array index
             //0 = 2 card
             //1 = 3 card
             //2 = 4 card
             //3 = 5 card
             //4 = 6 card
             //5 = 7 card
             //6 = 8 card
             //7 = 9 card
             //8 = 10 card
             //9 = Jack card
             //10 = Queen card
             //11 = King card
             //12 = Ace card
	int iNumberOfDraws = 0;     //Number of rounds of card draws
	int iSuit [4] = {0};         //Suit array index
             //0 = diamonds
             //1 = hearts
             //2 = clubs
             //3 = spades

	int iNumberOfPlayers = 0;    //Number of players in current game
	int iPlayerCount[5];      //Integer array to holder each player's count
             //iPlayer[0] is always the dealer
	int iHighestCount = 0;     //Highest count for a single game
	int k, m;         //integer loop counters
	srand(GetTickCount());     //Seed the random number generator

	do
	 {
		cout << endl << "Welcom to Honest Sam's Black Jack Table" << endl << endl;
		cout << "Press Y or y to play or any other key to exit game:  ";
		cin >> cPlay;
		if(cPlay != 'Y' && cPlay != 'y')
		{
			return (0);		 // complete this
		}

		for(k = 0; k < 4; k++)
		{
			for(m = 0; m < 13; m++)
			{
				cCardDeck[k][m] = iCard [m] + iSuit[k];		// complete this
			}
		}

		for(k = 0; k < 5; k++)
		{
			iPlayerCount[k] = 0;
			bPlayerDraw[k] = 1;							// complete this
		}

		iNumberOfDraws = 0;
		iHighestCount = 0;
		system("cls");
		
		cout << "Welcome to Honest Sam's Black Jack Table" << endl << endl;
		cout << "Glad to have you back!" << endl << endl;
		
		do
		{
			cout << "How many people would like to play?" << endl;
			cout << "Enter the number of Players: ";
			cin >> iNumberOfPlayers;								// complete this
		}
		while(iNumberOfPlayers < 1 || iNumberOfPlayers > 4);

		cout << endl << endl;
		cout << "              Dealer ";
		
		for(k = 0; k < iNumberOfPlayers; k++)		//Display Dealer and Player # header for card output display
		{
			cout << "  Player " << k+1;
		}
		
		while(iNumberOfDraws < 5)
		{
			iNumberOfDraws++;
			cout << endl << "Card " << iNumberOfDraws << ":  ";
			
			for(k = 0; k < iNumberOfPlayers + 1; k++)		//Loop for card drawing, player hold, card display and count totals
			{
				do
                                {
					iSuit = rand()%4;
					iCard = rand()%13;
				}
				while(cCardDeck[iSuit] [iCard] != ' ');
				
				if(bPlayerDraw[k] == true)
				{
					cCardDeck[iSuit[],iCard[]] = k + 48;	 //Store ASCII number of player in card deck array to indicate which
															//player drew the card
					if(iCard < 8)							//Calculate card count		//Note Aces have been set = 11, not 1 or 11, maybe later...
						iPlayerCount[k] += iCard [8] + 2;

					else if(iCard == 8 || iCard < 12)
						......// complete this
					else
					......// complete this
					
					if(iPlayerCount[k] == 21 || iPlayerCount[k] > 18 - rand()%3)	
					{     //Use random number to determine whether to draw another card
						......
							if(iCard < 9)					     //Output card 
								cout << setw(9)<< iCard + 2;
							else if (iCard == 9)
								cout << setw(9)<< "J";
							else if (iCard == 10)
								cout << setw(9)<< "Q";
							else if (iCard == 11)
								cout << setw(9)<< "K";			// complete this
							else
								cout << setw(9)<< "A"			// complete this
					}											//Output symbol for card suit
					cout << char(iSuit+3);
				}
				else
					cout << "      Hold";
			}
		}

		cout << endl << endl << "Final:   ";		 //Output final count for each iPlayerCount
		for(k = 0; k < iNumberOfPlayers + 1; k++)	
		{
			.....// complete this
				cout << endl << "            ";
		}

		//Find highest winning count
		for(k = 0; k < iNumberOfPlayers + 1; k++)	
		{
			if(iPlayerCount[k] > iHighestCount && iPlayerCount[k] <= 21)
				iHighestCount = iPlayerCount[k];
		}

		//Output whether dealer and players won or lost
		for(k = 0; k < iNumberOfPlayers + 1; k++)	
		{
			if(iPlayerCount[k] == iHighestCount)
				cout << endl << endl << "Player number " << iPlayerCount[k] << " you win!";		// complete this
			else
				cout << endl << endl <<"Player number " << iPlayerCount [k] << " you are a looser!";	// complete this
		}

		//Display entire drawn deck to check if an honest game
		//What happens in Vegas or KC might not stay there...
		cout << endl << endl << endl << "Display entire card deck, rows = suits, columns = card";
		cout << endl << "0 = dealer card, 1 = Player 1 card, 2 = Player 2 card, etc.";
		cout << endl << endl << "   ";

		for(k = 0; k < 13; k++)
		{
			if(k < 9)
				cout << setw(3)<< k + 2;
			else if (k == 9)
				cout << setw(3)<< "J";
			else if (k == 10)
				cout << setw(3)<< "Q";	// complete this
			else if (k == 11)
				cout << setw(3)<< "K";	// complete this
			else
				cout << setw(3)<< "A";	// complete this
		}
		cout << endl;

		for(k = 0; k < 4; k++)
		{
			cout << setw(3) << char(k+3);
			for(m = 0; m < 13; m++)
			{
				cout << setw(3) << cCardDeck[k][m];
			}
			cout << endl;
		}
		cout << endl << endl;
}
while(1);

cin.ignore (2);
}

My problem is lines 111 to 116.

do
				{
					iSuit = rand()%4;
					iCard = rand()%13;
				}

I'm just not getting it

Thanks for any help

[3qX21hU5]

Basically what the lines are doing is they are assigning a number 1 - 4 to Isuit (Which will represent the suit of the card like 1 = hearts, 2 = Diamonds, ect). It also assigns a random number 1 - 13 to iCard which will resprent the number on the card 13 meaning Ace I assume 12 meaning King, ect.

[giblit]

are you not understanding the modulo basically it is saying it picks a random number then divides by 4/13 and suit/card is the remainder value

eg 10 % 4 would be 2 since 10/4 would have a remainder of 2 4*2 = 8 10-8 = 2.

[Yom]

Thanks for the comments, but maybe I should have clarified. I understand what the logic is, but I don't know what problem with the syntax is. In the sample (lines 94 to 99) how is the random number value assigned to the array elements? It isn't running inside of a loop so that I could use the index value as the value for the array element.