Hi,

I get:
error LNK2019: unresolved external symbol _main referenced in function _mainCRTStartup

when there is a main() function. It works fine in Borland 5.5

Any ideas?

Thanks

/************************************************** ********************
Filename: poker.cpp
Chapter: 4 Classes
Compiler: Borland C++ Version 5.01 Summer 1998
C++ for C Programmers, Edition 3 By Ira Pohl
************************************************** ******************/
#include <iostream>
#include <stdlib>
using namespace std;

enum suit { clubs, diamonds, hearts, spades };

class pips {

public:
    void assign(int n) { p = n % 13 + 1; }
    int getpip() { return p; }
    void print() { cout << p; }

private:
    int p;
};

class card {

public:
    suit s;
    pips p;
    void assign(int n)
    { cd = n; s = static_cast<suit>(n/13); p.assign(n); }
    void pr_card();

private:
    int cd; //a cd is from 0 to 51
};


class deck {

public:
    void init_deck();
    void shuffle();
    void deal(int, int, card*);
    void pr_deck();

private:
    card d[52];
};

void deck::init_deck()
{
    for (int i = 0; i < 52; ++i)
        d[i].assign(i);
}

void deck::shuffle()
{
    for (int i = 0; i < 52; ++i) {
        int k = i + (rand() % (52 - i));
        card t = d[i]; //swap cards
        d[i] = d[k];
        d[k] = t;
    }
}

void deck::deal(int n, int pos, card* hand)
{
    for (int i = pos; i < pos + n; ++i)
        hand[i - pos] = d[i];
}

int main()
{
    card one_hand[9]; //max hand is 9 cards
    deck dk;

    int i, j, k, fcnt = 0, sval[4];
    int ndeal, nc, nhand;

    do {
        cout << "\nEnter no. cards in a hand (5-9):";
        cin >> nc;
    } while (nc < 5 || nc > 9);

    nhand = 52 / nc;
    cout << "\nEnter no. of hands to deal: ";
    cin >> ndeal;

    srand(time(NULL)); //seed rand() from time()

    dk.init_deck();

    for (k = 0; k < ndeal; k += nhand) {

        if ((nhand + k) > ndeal)
            nhand = ndeal - k;

        dk.shuffle();

        for (i = 0; i < nc * nhand; i += nc) {
            for (j = 0; j < 4; ++j) //zero suit counts
                sval[j] = 0;

            dk.deal(nc, i, one_hand); //deal next hand

            for (j = 0; j < nc; ++j)
                sval[one_hand[j].s]++; //increment suit count

            for (j = 0; j < 4; ++j)
                if (sval[j] >= 5) //5 or more is flush
                    fcnt++;
        }
    }

    cout << "\n\nIn " << ndeal << " ";
    cout << nc << "-card hands there were ";
    cout << fcnt << " flushes\n ";

    int look; cin >> look;
}

First, you need to create a Windows Console Application. Under File->New, select Win32 Console Application. Give it a name over on the right and click OK. In the next window, select "An empty project", click "Finish" then "OK" in next window. Then go to File->New again, and under Files tab, select C++ Source File. Copy and paste the following revised code into the .cpp file and run.

/************************************************** ********************
Filename: poker.cpp
Chapter: 4 Classes
Compiler: Borland C++ Version 5.01 Summer 1998
C++ for C Programmers, Edition 3 By Ira Pohl
************************************************** ******************/
#include <iostream>
#include <stdlib.h>
#include <time.h>
using namespace std;

enum suit { clubs, diamonds, hearts, spades };

class pips {

public:
    void assign(int n) { p = n % 13 + 1; }
    int getpip() { return p; }
    void print() { cout << p; }

private:
    int p;
};

class card {

public:
    suit s;
    pips p;
    void assign(int n)
    { cd = n; s = static_cast<suit>(n/13); p.assign(n); }
    void pr_card();

private:
    int cd; //a cd is from 0 to 51
};


class deck {

public:
    void init_deck();
    void shuffle();
    void deal(int, int, card*);
    void pr_deck();

private:
    card d[52];
};

void deck::init_deck()
{
    for (int i = 0; i < 52; ++i)
        d[i].assign(i);
}

void deck::shuffle()
{
    for (int i = 0; i < 52; ++i) {
        int k = i + (rand() % (52 - i));
        card t = d[i]; //swap cards
        d[i] = d[k];
        d[k] = t;
    }
}

void deck::deal(int n, int pos, card* hand)
{
    for (int i = pos; i < pos + n; ++i)
        hand[i - pos] = d[i];
}

int main()
{
    card one_hand[9]; //max hand is 9 cards
    deck dk;

    int i, j, k, fcnt = 0, sval[4];
    int ndeal, nc, nhand;

    do {
        cout << "\nEnter no. cards in a hand (5-9):";
        cin >> nc;
    } while (nc < 5 || nc > 9);

    nhand = 52 / nc;
    cout << "\nEnter no. of hands to deal: ";
    cin >> ndeal;

    srand(time(NULL)); //seed rand() from time()

    dk.init_deck();

    for (k = 0; k < ndeal; k += nhand) {

        if ((nhand + k) > ndeal)
            nhand = ndeal - k;

        dk.shuffle();

        for (i = 0; i < nc * nhand; i += nc) {
            for (j = 0; j < 4; ++j) //zero suit counts
                sval[j] = 0;

            dk.deal(nc, i, one_hand); //deal next hand

            for (j = 0; j < nc; ++j)
                sval[one_hand[j].s]++; //increment suit count

            for (j = 0; j < 4; ++j)
                if (sval[j] >= 5) //5 or more is flush
                    fcnt++;
        }
    }

    cout << "\n\nIn " << ndeal << " ";
    cout << nc << "-card hands there were ";
    cout << fcnt << " flushes\n ";

    int look; cin >> look;
    return 0;
}