Function init_2d_array

week04/examples/md-array.cpp:7–13

You must tell the function the bound of an array, otherwise, elements cannot be accessed if the array is a variable-length one, it may be difficult to know the bound

// otherwise, elements cannot be accessed
// if the array is a variable-length one, it may be difficult to know the bound
void init_2d_array(float mat[][4], //error, arrays of unknown bound
                    size_t rows, size_t cols)
{
    for (int r = 0; r < rows; r++)
        for(int c = 0; c < cols; c++)
            mat[r][c] =  r * c;
}

int main()
{