I want to implement a matrix class, which is a template with data members as a two-dimensional array. When I recursively call in a template function, the compiler reports an error saying that the array is missing an index. What should I do? The following code is a simplified version

#include <iostream>

template<typename T, int N>
class Matrix
{
public:
    Matrix()
    {
        for (int i = 0; i < N; i++)
        {
            for (int j = 0; j < N; j++)
            {
                Data[i][j] = 0;
            }
        }
    }
private:
    T Data[N][N];
};

template<typename T, int N>
Matrix<T, N> compute(const Matrix<T, N>& vA, const Matrix<T, N>& vB)
{
    Matrix<T, N> C;
    if (N != 1)
    {
        const int HalfN = N >> 1;
        Matrix<T, HalfN> HalfA, HalfB, HalfC;
        HalfC = compute<T, HalfN>(HalfA, HalfB);
    }
    return C;
}

int main()
{
    const int n = 32;
    Matrix<int, n> A;
    Matrix<int, n> X;
    X = compute<int, n>(A, A); 
    return 0;
}

I still want to use two-dimensional arrays in template classes, how should I modify them