C++ 编辑二维数组中的值

Question

void update(bool **board){
    *(*(board + 2) + 1) = true;
}

int main(){
    bool board[3][2] = { false };

    update(board);

    for (int i = 0; i < 3; i++){
        for (int j = 0; j < 2; j++){
            if (board[i][j] == true){
                cout << "board[" << i << "][" << j << "] is true;" << endl;
            }
        }
    }
}

Where am I wrong? Also, can you please talk some more about arrays and pointers?

Answer 1

When you have a function

void update(bool **board){
    *(*(board + 2) + 1) = true;
}

it's wrong to call it using:

bool board[3][2] = { false };
update(board);

board decays to bool (*)[2] , not bool** .

You need to define update as:

void update(bool (*board)[2]){
     board[2][1] = true; // Simpler
}