e2.cpp

一、教学目的： 能理解C++中运算符重载的需要性

#include<iostream.h>          

class RMB
{
public:
	RMB(double d){yuan=(int)d;jf=(int)((d-yuan)*100);}
	void display()
	{
		cout<<(yuan+jf/100.0)<<endl;
	}
	RMB operator +(RMB d){return RMB(yuan+d.yuan+(jf+d.jf)/100.0);}
	//人民币加的运算符重载
	RMB operator *(double rate){return RMB((yuan+jf/100.0)*rate);}
private:
	unsigned int yuan;//元
	unsigned int jf;//角分
};
RMB expense2(RMB pricipal,double rate)
{
	RMB interest=pricipal*rate;//本金乘利息(重载)
	return pricipal+interest;//连带利(重载)
}

void main()
{
	RMB x=10000.10;
	double yrate=0.035;
    expense2(x,yrate).display();
}