第十二周—阅读程序（3）

#include<iostream>
using namespace std;
class Wages //“工资”类
{
double base;  //基本工资
double bonus; //奖金
double tax;   //税金
public:
Wages(double CBase, double CBonus,double CTax):
base(CBase), bonus(CBonus),tax(CTax) {}
double getPay()const; //返回应付工资额
Wages operator+(Wages &w)const; //（1）重载加法
//（2）常引用做形参，不会意外的发生对实参的更改
};
double Wages::getPay()const
{
return base+bonus-tax;
}
Wages Wages::operator+(Wages &w)const
{
return Wages(base+w.base,bonus+w.bonus,tax+w.tax);
}
int main()
{
Wages wl(2000,500,100),w2(5000,1000,300);
cout<<(wl+w2).getPay()<<endl;
return 0;
}