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f0904.cpp
Package: c.rar [view]
Upload User: puke2000
Upload Date: 2022-07-25
Package Size: 912k
Code Size: 1k
Category:
CSharp
Development Platform:
Visual C++
- //=====================================
- // f0904.cpp
- // partial initialization of constructor
- //=====================================
- #include<iostream>
- #include<iomanip>
- using namespace std;
- //-------------------------------------
- class Date{
- int year, month, day;
- void init();
- public:
- Date(const string& s);
- Date(int y=2000, int m=1, int d=1);
- bool isLeapYear()const;
- friend ostream& operator<<(ostream& o, const Date& d);
- };//-----------------------------------
- void Date::init(){
- if(year>5000 || year<1 || month<1 || month>12 || day<1 || day>31)
- exit(1); // 停机
- }//------------------------------------
- Date::Date(const string& s){
- year = atoi(s.substr(0,4).c_str());
- month = atoi(s.substr(5,2).c_str());
- day = atoi(s.substr(8,2).c_str());
- init();
- }//------------------------------------
- Date::Date(int y, int m, int d){
- year=y, month=m, day=d;
- init();
- }//------------------------------------
- bool Date::isLeapYear()const{
- return (year % 4==0 && year % 100 )|| year % 400==0;
- }//------------------------------------
- ostream& operator<<(ostream& o, const Date& d){
- o<<setfill('0')<<setw(4)<<d.year<<'-'<<setw(2)<<d.month<<'-';
- return o<<setw(2)<<d.day<<'n'<<setfill(' ');
- }//------------------------------------
- int main(){
- Date c("2005-12-28");
- Date d(2003,12,6);
- Date e(2002);
- Date f(2002,12);
- Date g;
- cout<<c<<d<<e<<f<<g;
- }//====================================