currency.cpp

一、教学目的： 能理解C++中运算符重载的需要性

#include<iostream.h>

class currency
{
public:
	currency(double v=0.0)
	{
		yuan=v;
		jf=(v-yuan)*100.0+0.5;
	}
	virtual void display(ostream&out)=0;
protected:
	unsigned int yuan;
	unsigned int jf;
};