#include <iostream>
#include <vector>
using namespace std;
 
class Queue_base{
	public: virtual void func()=0;
};
 
template <typename Ttype2>class Queue : public Queue_base{
	public: void func(){
		//... some code
	}
};
 
int main() {
    Queue_base* complex[2];
	complex[0]=new Queue<int>();
	complex[1]=new Queue<float>();
	complex[0]->func(); 
	std::vector<Queue_base*> complex2;
	complex2.push_back(new Queue<char>());
	//need deletion 
	return 0;
}

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