int main()
{
 myclass<int> myvecA;
 myclass<int> myvecB(10);
 myclass<int> myvecC(5,-9);
 myclass<string> myvecD(6, "Hi");

 cout << "A size: " << myvecA.size() << endl;
 cout << "B size: " << myvecB.size() << endl;
 cout << "C size: " << myvecC.size() << endl;
 cout << "D size: " << myvecD.size() << endl;
system("Pause");
return 0;
}

#include<iostream>

template <class C>
 class vector{

public:
 vector(int x);{
    sizearr = x;}

 explicit vector() : sizearr(0) {}

 V size();

private:

 V sizearr;

};

template <class V>
 V vector<V>::size() {
   return sizearr;
}