将变量大小的数组传递给函数

Question

我需要将2D数组传递给函数，但它不适合我。它说＆＃34;没有匹配功能来调用display_board＆＃34;。我需要让用户定义2D数组的大小并将其传递给函数。应该很容易，但我无法让它发挥作用。需要帮忙！！非常感谢!!

void display_board(int r, int c, char b[][c])
{
    for (int i=0; i<r; i++) {    //print out the board. Need to be deleted at last.
        for (int j=0; j<c; j++) {
            cout<<b[i][j];
        }
        cout<<endl;
    }

}



int main()
{
    int rows,columns,n;       
    cout<<"Enter rows: ";
    cin>>rows;
    cout<<"Enter columns: ";
    cin>>columns;
    cout<<"Enter n-in-a-row: ";
    cin>>n;


    char board_info[rows][columns]; //initialze the board
    for (int i=0; i<rows; i++) {
        for (int j=0; j<columns; j++) {
            board_info[i][j]='.';
        }
        cout<<endl;
    }


    display_board(rows, columns, board_info);//Says "no matching function for call to display_board"

    for (int i=0; i<rows; i++) {    //print out the board. Need to be deleted at last.
        for (int j=0; j<columns; j++) {
            cout<<board_info[i][j];
        }
        cout<<endl;
    }
}