老代码,语法应该是c#（？）后缀.h 我复制粘贴到新的工程文件里的.h会报错,为什么？

老代码

复制后

删掉public后

但是删除public之后，虽然.h和.cpp不会报错 但是我引用里面的数据会报错
以下为同理的另一段代码
.h文件

namespace SDFController
{
    using namespace MeshStructures;
    using namespace MyMath;
     class SDF//原为public class SDF
    {
    public:
        void CreateRay(int rayNumber, double rayAngle, ak::Model const& model);
        void CreateOctree(ak::Model const& model);
        void ComputeCenterAndSize(ak::Model const& model);
    private:
        float diagonal;
    /*    CAssimp* loggger;*/
        HashTable<Face>* fc_list;            // hashovacia tabulka facov facov哈希表
        /*LinkedList<Octree>* oc_list;    */    // prealokovany list octree 预分配表 octree
        int kernel_size;                    // velkost gaussianu pri vyhladeni
        LinkedList<Face>** gauss_sus;
        unsigned int prealocated_space;
        double randomDouble(double min, double max);
        //double vectorMedian(std::vector<double>& v);
        //double distanceBetween(const Vector3& u, const Vector3& v);
        MyOctree *m_root;

        glm::vec4           ModelCenter;    
        float               Octree_Size;   
        float                b_sf;            // scale factor
        float                b_max;            // diagonala v octree
        glm::vec4            o_min;
        glm::vec4            o_max;
        unsigned int        nodeCount;
        unsigned int        leafCount;
        unsigned int        triangleCount;
        LinkedList<Face>* triangles;
    };
}

.cpp文件

namespace SDFController
{
void SDF::CreateOctree(ak::Model const& model)
    {
        SDF::ComputeCenterAndSize(model);
        m_root = new MyOctree(1, Octree_Size, ModelCenter);
        unsigned int siz = model.triangles.size();
        if (siz > 0)
        {
            unsigned int* mtria = new unsigned int[siz];
            Face** tria = new Face * [siz];
            unsigned int* mtria = new unsigned int[siz];
            LinkedList<Face>::Cell<Face>* tmp2 = triangles->start;
            int i = 0;
            while (tmp2 != NULL)
            {
                tria[i] = tmp2->data;
                mtria[i] = 0;
                tmp2 = tmp2->next;
                i++;
            }

            nodeCount = 0, triangleCount = 0, leafCount = 0;
            m_root->Build2(tria, mtria, 0, siz, nodeCount, triangleCount, leafCount);
            o_min = glm::vec4(m_root->origin.x - m_root->size, m_root->origin.y - m_root->size, m_root->origin.z - m_root->size, 1.0f);
            o_max = glm::vec4(m_root->origin.x + m_root->size, m_root->origin.y + m_root->size, m_root->origin.z + m_root->size, 1.0f);
        }
}

.h 文件是C++的