C++ Proxy

Here is a common interface that the proxy and service
must share. (They could have shared a superclass instead).
-----------------------------------------------------
class IService{
public:
     virtual std::string doIt(int value) = 0;
}
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Here is the service providing class
-----------------------------------------------------
class Service : public IService{
public:
	std::string doIt(int value);
};

std::string Service::doIt(int value){
	return std::string("I performed some service for you\n");
}

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Here is the proxy class. 
The proxy here is providing a security layer to calls 
made to the service. (It does not like the int 2)
Proxy classes are commonly used for some type of
service managment.
-----------------------------------------------------
class ServiceProxy : public IService{
public:
	std::string doIt(int value);
private: 
	Service service;
};

std::string ServiceProxy::doIt(int value){
	if(value ==2)
		return std::string("I refuse\n");
	else
		return service.doIt(value);
}
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Here is the test class that simply demonstrates the 
function of the proxy class.
-----------------------------------------------------

int main(){
	std::cout<<"main: START\n";

	IService*  service = new Service();
	IService* serviceProxy = new ServiceProxy();

	std::cout<<"calling service and proxy with an arg of 1\n";
	std::cout<<"service: " << service->doIt(1);
	std::cout<<"proxy: " << serviceProxy->doIt(1)<<std::endl;


	std::cout<<"calling service and proxy with an arg of 2\n";
	std::cout<<"service: " << service->doIt(2);
	std::cout<<"proxy: " << serviceProxy->doIt(2);

	std::cout<<"main: END\n";
	return 0;

}

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Here is a tar with above classes in it. 
C++_proxy.tar