使用模板实现编译期间多态

#include <iostream>
using namespace std;

class DemoOne{
public:
	void f(bool someParm=true){ cout<<"DemoOne f functions\n";}
	void g(){ cout<<"DemoOne g functions\n";}
	// other functions...
};

class DemoTwo{
public:
	void f(){ cout<<"DemoTwo f functions\n";}
	void g(double a=1.12,double b=1.123){ cout<<"DemoTwo g functions\n";}
	// other functions...
};

template<typename T>
void h(T& t){
	t.f();
	t.g();
}

int _tmain(int argc, _TCHAR* argv[])
{
	DemoOne one;
	DemoTwo two;
	h(one);
	h(two);

	return 0;
}