TDate类

#include<iostream>
using namespace std;
int yearyn(int y);

class TDate{
private:
	int year,month,day;
public:
	TDate(int,int,int);
	void setDate(int,int,int);
	void addOneDay();
	void print() const;
};

TDate::TDate(int a,int b,int c){
	setDate(a,b,c);
}

void TDate::setDate(int y,int m,int d){
	year=y;
	month=m;
	day=d;
}

void TDate::addOneDay(){
	day++;
	if((month==1||month==3||month==5||month==7||month==8||month==10|month==12)&&day==32)
	{month++;day=1;}
	else if((month==4||month==9||month==11)&&day==31)
	{month++;day=1;}
	else if(yearyn(year)==1&&month==2&&day==30)
	{month++;day=1;}
	else if(yearyn(year)==0&&month==2&&day==29)
	{month++;day=1;}
	if(month==13) {year++;month=1;}	
}

int yearyn(int y) {
	if(y%400==0||(y%100!=0&&y%4==0))
		return 1;
	else return 0;
}
void TDate::print() const{
	cout<<year<<"-"<<month<<"-"<<day;
}

int main(){
	int y,m,d;
	cout<<"请按年月日的顺序输入日期：";
	as:
	cin>>y>>m>>d;
	if((y<0)||(m<0||m>12)||(d<0||d>31)||(yearyn(y)==0&&m==2&&d>28)){
		cout<<"输入的时间有错，请重新输入：";goto as;}
	TDate time(y,m,d);
	time.print();
	cout<<endl<<"加一天之后："<<endl;
	time.addOneDay();
	time.print();
	system("pause");
	return 0;
}