矩阵的叉乘

 n*d的矩阵和d*m的矩阵相乘

    // 计算矩阵相乘的结果
    for (int i = 1; i <=n; i++)
    {
        for (int j = 1; j <=m; j++)
        {
            for (int x = 1; x <=d; x++)
            {
                result[i][j] += a[i][x] * b[x][j];
            }
        }
    }