如何在构造函数中初始化2D数组的值？

Question

在构造函数中初始化2D数组的值时遇到问题。我正在创建一个Tic-Tac-Toe游戏。我需要初始化2D数组中的值，以便将值显示在板上。我不确定这样做的方式。

I used a nested for loop to initialize values but it didn't work.  

class TicTacToe
{
private:
    char matrix[3][3];
public:
TicTacToe();
TicTacToe(char matrix[3][3]);


TicTacToe::TicTacToe(char matrix[3][3])
{
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            cout << matrix[i][j] << " ";
        }
        cout << endl;
    }
}


I expect the values from the array to be displayed on the board.