时间加减运用派生和重载

来源：互联网发布：sequoiadb巨杉数据库编辑：程序博客网时间：2024/06/08 15:21
#include<iostream>#include<string>using namespace std;class Time{public:void display(){cout<<hour<<":"<<minute<<":"<<sec<<endl;}protected:int hour;int minute;int sec;};class Date{public:void display1(){cout<<year<<":"<<month<<":"<<day<<endl;}protected:int year;int month;int day;};class DateTime:public Time,public Date{public:friend istream& operator >>(istream &input,DateTime &t1);friend ostream& operator <<(ostream &output,DateTime &t1);friend DateTime operator +(DateTime &t1,DateTime &t2);friend DateTime operator -(DateTime &t1,DateTime &t2);private:   string place;};istream& operator >>(istream &input,DateTime &t1){input>>t1.place>>t1.year>>t1.month>>t1.day>>t1.hour>>t1.minute>>t1.sec;return input;}ostream& operator<<(ostream &output,DateTime &t1){output<<t1.place<<":"<<t1.year<<"/"<<t1.month<<"/"<<t1.day<<"/"<<t1.hour<<":"<<t1.minute<<":"<<t1.sec;return output;}DateTime operator +(DateTime &t1,DateTime &t2){DateTime t3;t3.sec=t1.sec+t2.sec;t3.minute=t1.minute+t2.minute;t3.hour=t1.hour+t2.hour;t3.day=t1.day+t2.day;t3.month=t1.month+t2.month; t3.year=t1.year+t2.year;t3.place=t1.place; if(t3.sec>60){t3.sec-=60;t3.minute+=1;}if(t3.minute>60){t3.minute-=60;t3.hour+=1;}if(t3.hour>24){t3.hour-=24;t3.day+=1;}if(t3.month==1||3||5||7||8||10||12){if(t3.day>31){t3.day-=31;t3.month+=1;}}if(t3.month==4||6||8||10||11){if(t3.day>30){t3.day-=30;t3.month+=1;}}    if(t3.month==2)    {    if(t3.day>28)    {    t3.day-=28;    t3.month+=1;}}if(t3.month>12){t3.month-=12;t3.year+=1;}return t3;}DateTime operator -(DateTime &t1,DateTime &t2){DateTime t3;t3.sec=t1.sec-t2.sec;t3.minute=t1.minute-t2.minute;t3.hour=t1.hour-t2.hour;t3.day=t1.day-t2.day;t3.month=t1.month-t2.month; t3.year=t1.year-t2.year;t3.place=t1.place; if(t3.sec<0){t3.sec+=60;t3.minute-=1;}if(t3.minute<0){t3.minute+=60;t3.hour-=1;}if(t3.hour<0){t3.hour+=24;t3.day-=1;}if(t3.month==1||3||5||7||8||10||12){if(t3.day<0){t3.day+=31;t3.month-=1;}}if(t3.month==4||6||8||10||11){if(t3.day<0){t3.day+=30;t3.month-=1;}}    if(t3.month==2)    {    if(t3.day<0)    {    t3.day+=28;    t3.month-=1;}}if(t3.month<0){t3.month+=12;t3.year-=1;}return t3;}    int main(){DateTime d1,d2,d3,d4;cout<<"地点："<<'\t'<<"年："<<'\t'<<"月"<<'\t'<<"日"<<'\t'<<"时"<<'\t'<<"分"<<'\t'<<"秒"<<endl; cin>>d1;cin>>d2; cout<<"两时间相加为："<<endl; d3=d1+d2;d4=d1-d2;cout<<d3<<endl;cout<<"两时间相减为："<<endl;cout<<d4<<endl;}
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