对于类对父类私有成员变量的继承问题

对于一个父类，我声明了一些私有成员变量，并声明它的子类为父类的友元。在子类的方法中我用到了父类的变量，但编译器却告诉我没有声明。附上代码。

#include <iostream>
#include "Chain.h"

class LinkedDigraph;
template<class T>
class LinkedWDigraph;
template<class T>
class LinkedBase{
    friend LinkedDigraph;
    friend LinkedWDigraph<T>;
    public:
        LinkedBase(int Vertices=10){
            n=Vertices;
            e=0;
            h=new Chain<T>[n+1];
        }
        ~LinkedBase(){
            delete [] h;
        }
        int Edges() const{
            return e;
        }
        int Vertices() const{
            return n;
        }
        int OutDegree(int i) const{
            if(i<1||i>n) throw "wrong info";
            return h[i].length;
        }
        void InitializePos(){
            pos=new ChainIterator<T> [n+1];
        }
        void DeactivatePos(){
            delete []pos;
        }
    private:
        int n,e;
        Chain<T> *h;
        ChainIterator<T>* pos;
}; 
template<class T>
class LinkedWGraph;
template<class T>
class GraphNode{
    friend LinkedWDigraph<T>;
    friend LinkedWGraph<T>;
    friend Chain<T>;
    private:
        int vertex;
        T weight;
};
template <class T>
class LinkedWDigraph:public LinkedBase<GraphNode<T> >{//Note:两个右尖括号不能连续使用 
    public:
        LinkedWDigraph(int Vertices=10): LinkedBase<GraphNode<T> >(Vertices){}
        LinkedWDigraph<T>& Add(int i,int j,const T& w);
    protected:
        LinkedWDigraph<T>& AddNoCheck(int i,int j,const T&w);    
};
template<class T>
LinkedWDigraph<T>& LinkedWDigraph<T>::Add(int i,int j,const T& w){
    return AddNoCheck(i,j,w);
}
template<class T>
LinkedWDigraph<T>& LinkedWDigraph<T>::AddNoCheck(int i,int j,const T& w){
    GraphNode<T> x;
    x.vertex=j;
    x.weight=w;
    h[i].Insert(0,x);
    e++;
    return *this;
}

错误提示：69 2 C:\Users\dell\Documents\LinkedBase.cpp [Error] 'h' was not declared in this scope
70 2 C:\Users\dell\Documents\LinkedBase.cpp [Error] 'e' was not declared in this scope

第36行 private(私有):僅供父類別使用，子類別及外界不可取；試改為protected(保護):可供父類別及子類別使用，外界不可取。