iterable_container.cpp

#include <iostream>
#include <vector>

template<typename T>
class container{
    public:
        container();
        T* begin();
        T* end();    
        void push_back(T);
    private:
        T* head;
        T* tail;
        int len;
};

using namespace std;

template<typename T>
container<T>::container():len(0){
    head = new T;
}

template<typename T>
T* container<T>::begin(){
    return head;
}

template<typename T>
T* container<T>::end(){
    return (head + len);
}

template<typename T>
void container<T>::push_back(T d){
    *(head + len++) = d;
    tail++;
}

int main(void){
    container<int> a;
    a.push_back(5);
    a.push_back(10);
    for(auto i: a){
        cout << i << endl;
    }
    return 0;
}