c++ - テンプレート化されたクラス間の可視性

Question

名前が示すように、TwoWayVector と TwoWayVectorIterator の 2 つのクラスがあります。独自のベクター クラスとその反復子を実装しようとしています。私はいくつかの可視性の問題を抱えているようで、メソッド TwoWayVector.begin(); から TwoWayVectorIterator を構築する方法もわかりません。

TwoWayVector.cc

#include <sstream>

using namespace std;

template <class T> class TwoWayVector{
public:

T* data;
int capacity;
int nextFree;

TwoWayVector(){
    capacity = 10;
    nextFree = 0;
    data = new T[capacity];
}

~TwoWayVector(){
    delete data;
}

T& operator[](const int index){
    if( index >= capacity || capacity + index < 0){
        string number = static_cast<ostringstream*>( &(ostringstream() << index) )->str();
        string error = "index " + number + " is out of bounds"; 
        throw error;
    }
    else if(index < 0){
        return data[nextFree+index];
    }
    return  data[index];
}
 //memory leaks?
void push_back(T object){
    if(capacity <= nextFree){
        capacity = capacity*2;
        T* tmp = new T[capacity];
        for(int i=0; i<capacity; i++){
            tmp[i] = data[i];
        }
        delete data;
        data = tmp;
    }
    data[nextFree] = object;
    nextFree++;
}

T pop_back(){
    nextFree--;
    T result = data[nextFree];
    data[nextFree] = NULL; 
    return result;
}

int size(){
    return nextFree;
}

TwoWayVectorIterator begin(){
    TwoWayVectorIterator<T> iterator= new TwoWayVectorIterator<T>(0,this);
    return (iterator);
}

};

TwoWayVectorIterator.cc

using namespace std;

template <class T> class TwoWayVectorIterator{
public:
TwoWayVector<T>* vector;
int currentPosition;
TwoWayVectorIterator(TwoWayVector<T>& vec){
    currentPosition = 0;
    vector = vec;
}
TwoWayVectorIterator( int pos , TwoWayVector<T>& vec){
    currentPosition = pos;
    vector = vec;
}

bool& operator==(const TwoWayVectorIterator* vector2){
    bool address, position;
    address = (&vector == &vector2) ? true : false;
    position =(currentPosition == vector2->currentPosition) ? true : false;
    return (address && position);
}

bool& operator!=(const TwoWayVectorIterator* vector2){
    bool address, position;
    address = (&vector == &vector2) ? true : false;
    position=(currentPosition == vector2->currentPosition) ? true : false;
    return (address && position);
}

TwoWayVectorIterator& operator++(){
    currentPosition = (currentPosition+1);
    return *this;
}
TwoWayVectorIterator& operator++(int){
    currentPosition = (currentPosition+1);
    return *this;
}
TwoWayVectorIterator& operator=(TwoWayVectorIterator* vector2){
    &vector = vector2;
    currentPosition = vector2->currentPosition;
    return *this;
}
TwoWayVectorIterator& operator+(int n){
    currentPosition = currentPosition+n;
    return *this;
}
TwoWayVectorIterator& operator-(int n){
    currentPosition = currentPosition-n;
    return *this;
}
bool& operator<(TwoWayVectorIterator* vector2){
    return (currentPosition<vector2->currentPosition);
}
T& operator*(){
    return vector[currentPosition];
}
};

Test.cc から呼び出される

using namespace std;
#include <iostream>
#include "TwoWayVector.cc"
#include "TwoWayVectorIterator.cc"

int main(){

TwoWayVector<int> numbers;
numbers.push_back(3);
numbers.push_back(2);
numbers.size();
TwoWayVectorIterator current = numbers.begin();
return 0;

}

コンパイラ エラー:

In file included from Test.cc:3:
TwoWayVector.cc:59: error: ‘TwoWayVectorIterator’ does not name a type
Test.cc: In function ‘int main()’:
Test.cc:18: error: missing template arguments before ‘current’
Test.cc:18: error: expected `;' before ‘current’

いくつかの異なる方法、異なる包含スキームを宣言し、 TwoWayVectorIterator current = numbers.begin() を呼び出してみましたが、イテレータの型を指定する必要はありません。

ここで何か助けていただければ幸いです!!