Clueless about whats wrong(tic tac toe)

[jamort]

This code is supposed to accept the input from the user and which ever spot the player chooses it makes it equal to one(for x), but for some reason its not working the way I would like... any help appreciated.. Thanks!

#include <iostream>

typedef struct{
    int tttPositions[9];
}gameBoard;

//function prototypes
void displayBoard(gameBoard);
void getPlayerChoice(gameBoard);

int main(){
    gameBoard board;
    board.tttPositions[0] = 0;
    board.tttPositions[1] = 0;
    board.tttPositions[2] = 0;
    board.tttPositions[3] = 0;
    board.tttPositions[4] = 0;
    board.tttPositions[5] = 0;
    board.tttPositions[6] = 0;
    board.tttPositions[7] = 0;
    board.tttPositions[8] = 0;

    bool playing = true;
    while (playing == true){
        displayBoard(board);
        getPlayerChoice(board);
    }

}

void displayBoard(gameBoard board){
    for(int loopNumber = 0; loopNumber <= 8; loopNumber++){
        switch(board.tttPositions[loopNumber]){
            case 0:
                std::cout<< " - ";
                break;
            case 1:
                std::cout<< " X ";
                break;
            case 2:
                std::cout<< " O ";
                break;
        }
        if (loopNumber == 2 || loopNumber == 5 || loopNumber == 8){
                std::cout<< std::endl;
        }

    }
}

void getPlayerChoice(gameBoard board){
    int temp;
    std::cout<< "Where would you like to place your piece?" << std::endl;
    std::cin>> temp;
    std::cin.ignore();
    temp -= 1;
    board.tttPositions[temp] = 1;
}

[Ushakal]

You need to pass the gameBoard object as a pointer, or by reference. Currently your code is creating a copy of the gameBoard object becuase you're passing by value when you call the getPlayerChoice function, so you are not making any changes to the original object.

[jamort]

Okay so I see what he problem is.. I know what pointers and references are, but I'm not that sure how to pass them in a function to get the results needed(I've tried several different attempts)

[Programmer_P]

Okay so I see what he problem is.. I know what pointers and references are, but I'm not that sure how to pass them in a function to get the results needed(I've tried several different attempts)

void displayBoard(gameBoard& board);
void getPlayerChoice(gameBoard& board);
//...
void displayBoard(gameBoard& board){
    for(int loopNumber = 0; loopNumber <= 8; loopNumber++){
        switch(board.tttPositions[loopNumber]){
            case 0:
                std::cout<< " - ";
                break;
            case 1:
                std::cout<< " X ";
                break;
            case 2:
                std::cout<< " O ";
                break;
        }
        if (loopNumber == 2 || loopNumber == 5 || loopNumber == 8){
                std::cout<< std::endl;
        }

    }
}

void getPlayerChoice(gameBoard& board) {
    int temp;
    std::cout<< "Where would you like to place your piece?" << std::endl;
    std::cin>> temp;
    std::cin.ignore();
    temp -= 1;
    board.tttPositions[temp] = 1;
}

[jamort]

okay.. i see now i was placing the & in the wrong part of the program... thanks!