虚函数.cpp

来自「在linux文件系统下」· C++ 代码 · 共 39 行

#include "iostream"
using namespace std;
class Base
{
   public:
	   virtual void fn(int x)
	   {
		   cout<<"In Base class,int x="<<x<<endl;
	   }
}

class SubClass:public Base
{
public:
	virtual void fn(float x)
	{ 
		cout<<"In Subclass,float x="<<x<<endl;
	}
};

void test(Base&b)
{
	int i=1;
	b.fn(i);
	float f=2.0;
	b.fn(f);
}

void main()
{
	Base bc;
	SubClass sc;
	cout<<"Calling test(bc)\n";
	test(bc);
	cout<<"Calling test(sc)\n";
	test(sc);
}