#include <iostream>

#include <vector>

template<class T >

class ObserverPattern{

};

template<class T>

ObserverPattern<T>::ObserverPattern():observed(0){}

template<class T>

ObserverPattern<T>::ObserverPattern(T& observed_){}

template <class T>

ObserverPattern<T>::~ObserverPattern(){

}

template<class T>

void ObserverPattern<T>::observe(T& value){

std::cout<<"Observing..."<<std::endl;

update(value);

}

template<class T>

void ObserverPattern<T>::update(T& value){

try{

observed= value;

}catch(std::exception& e){

std::cout<<e.what()<<std::endl;

}

std::cout<<"Value observed :"<< observed<<std::endl;

}

template<class U>

class Object{

};

template<class U>

Object<U>::Object():value(0){}

template<class U>

Object<U>::Object(std::vector<U>& values_, U& value_){

obsvrptr= new ObserverPattern<U>;

}

template <class U>

Object<U>::~Object(){

}

template<class U>

void Object<U>::setvalue(U& value_){

value =value_;

obsvrptr->observe(value_);

}

int main(){

}