运算

//
// Created by moon on 9/7/17.
//
#include <iostream>
using namespace std;

class Date{
private:
    int Day,Month,Year;
public:
    Date(int InputDay,int InputMonth,int InputYear):Day(InputDay),Month(InputMonth),Year(InputYear){};
    //返回值，＋完之后会得到值。＆，证明是返回本身。
    Date& operator +(int DaysToAdd){
        Day+=DaysToAdd;

        return *this;

    }

    void DisplayDate(){
        cout<<Day<<"/"<<Month<<"/"<<Year<<endl;
    }
};

int main(){
    Date Holiday(25,12,2011);
    Holiday.DisplayDate();
    Date fuck(Holiday);
    Date sex = Holiday+7;
    sex.DisplayDate();
}