//************************************************
//sample: object factory generate random object,
//typeid dysplay the name
//************************************************

#include <iostream>
#include <typeinfo>
using namespace std;

//------------------------------------------------
class mammal{
public:
	virtual int how(){return 0;}
};

class dog:public mammal{
public:	
	int how(){return 0;}
};

class cat:public mammal{
	//code
};

class platypus:public mammal{
	//code
};

//++++++++++++++++++++++++++++++++++++++++++++++++++
mammal *factory(){
	switch(rand() %3){
		case 0: return new dog;
		case 1: return new cat;
		case 2: return new platypus;
	}	
}

//===================================================
int main(){
	mammal *p;
	int d=0, c=0, pl=0,m=0;
	for(int i=0;i<10;i++){
		p=factory();
		cout<<"    "<<typeid(p).name()<<endl;
		if(typeid(p)==typeid(dog)) d++;
		if(typeid(p)==typeid(cat)) c++;
		if(typeid(p)==typeid(platypus)) pl++;
	}
	cout<<endl;
	cout<<"there are "<<d<<" dogs"<<endl;
	cout<<"there are "<<c<<" cats"<<endl;
	cout<<"there are "<<pl<<" platypus"<<endl;
	cout<<"there are "<<m<<" mammal"<<endl;
	return 0;
}