Connect Four Help

[vhernan2]

So I have this program that uses a C4Col class that will represent the columns of a Connect 4 board. It also has the C4Board class which creates an array of C4Col class objects. The problem I'm running into is that when I add a piece after the second player's turn, if the piece happens to be next to the previous player's move, the program adds 1 to the location the previous player entered. I'm using 'X' and 'O' to represent the pieces so to clarify, the program would go on to change the X piece to a Y or the O piece to an O, any help would be greatly appreciated! (I know the code below doesn't have a way for verifying a winner yet!)

#ifndef ConnectFour_C4Col_h
#define ConnectFour_C4Col_h

class C4Col{
public:
    C4Col();
    int isFull();
    int getMaxDisc();
    char getDisc(int);
    void addDisc(char);
    
private:
    int numDiscs;
    int maxDiscs;
    char Discs[];
};

#endif

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

#include <iostream>
#include "C4Col.h"

C4Col::C4Col(){
    numDiscs = 0;
    maxDiscs = 6;
    for (int i = 0; i < maxDiscs ; i++){
        Discs[i] = ' ';
    }

}

int C4Col::isFull(){
    if (numDiscs == maxDiscs){
        return 1;
    }
    else return 0;
}

int C4Col::getMaxDisc(){
    return maxDiscs;
}

char C4Col::getDisc(int a){
    if (a >= maxDiscs){
        std::cout << "INVALID SELECTION.";
    }
    return Discs[a];
    
}

void C4Col::addDisc(char piece){
    Discs[numDiscs++] = piece;
}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


#ifndef ConnectFour_C4Board_h
#define ConnectFour_C4Board_h

#include "C4Col.h"

class C4Board{
public:
    C4Board();
    void display();
    void play();
private:
    int columns;
    C4Col Board[100] ;
};


#endif

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

#include <iostream>
#include "C4Col.h"
#include "C4Board.h"
using namespace std;

C4Board::C4Board(){
    columns = 7;
    
}

void C4Board::display(){
    for (int c = 1 ; c <= columns ; c++){
        cout << " " << c;
    }
    cout << "\n";
    for (int i = Board[0].getMaxDisc() - 1 ; i >= 0 ; i--){
        cout << "|";
        for (int j =0 ; j < columns ; j++){
            cout << Board[j].getDisc(i) << "|";
        }
        cout << endl;
    }
}

void C4Board::play(){
    int move;
    int turn = 1;
    const char player1 = 'X';
    const char player2 = 'O';
    char playChoice;
    bool GameOver = false;
    cout << "Welcome to Connect 4!" << endl;
    while(!GameOver){
        if (turn%2 == 1){
                 display();
                cout << "Player one enter your move: ";
                cin >> move;
                if (Board[--move].isFull()){
                    cout << "Invalid Selection. Please try again." << endl;
                    turn = turn;
                }
                else{
                Board[move].addDisc(player1);
                turn++;
                }
        }
        
        if (turn %2 == 0){
                    display();
                cout << "Player two enter your move: ";
                cin >> move;
                if (Board[--move].isFull()){
                    cout << "Invalid Selection. Please try again." << endl;
                    turn = turn;
                }
                else {
                    Board[move].addDisc(player2);
                    turn++;
                }
        }
        if (turn > 42){
            GameOver = true;
        }
        if (GameOver){
            cout << "Game Over!\nWould you like to play again? (y or n)" << endl;
            cin >> playChoice;
            if (playChoice != 'y' || playChoice != 'n'){
                cout << "Invalid Selection. Try again." << endl;
                GameOver = true;
            }
            if (playChoice == 'y'){
                GameOver = false;
            }
            if (playChoice == 'n'){
                // Display score ie wins for each player
                cout << "Player Scores: " << endl;
                break;
            }
        }
        
    }
}