hq.cpp

计算机网络实验上的串口通信程序2

#include<iostream>
#include<iomanip>
//#include<string>
using namespace std;
class date{

void init();
public:
	int year,month,day;
	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>12||month<1||day<1||day>31)
		exit(1);
}

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==0)||year%400==0);
}
inline ostream& operator<<(ostream& o,const date& d)
{
	return o<<setfill('0')<<setw(4)<<d.year<<"-"<<setw(2)<<d.month<<"-";
	o<<setw(2)<<d.day<<'\n';

}
int main()
{
	date c("2005-12-28");
	date d(2003,12,6);
	date e(2002);
	date g;
	cout<c;
	return 1;
}