date.cpp

定义日期类Date。要求： （1）可以设置日期； （2）日期加一天操作； （3）输出函数

#include<iostream>
using namespace std;
class Date
{
private:
	int m_year;
	int m_month;
	int m_day;
public:
	Date(int y,int m,int d):m_year(y),m_month(m),m_day(d){}
    void SetDate(int y,int m,int d);
	void Display();
	void DateAddOne();
	bool IsLeapYear();
    int	DaysOfMonth(int month);


};
void Date::SetDate(int y,int m,int d)
{
	m_year=y;
	m_month=m;
	m_day=d;
}
void Date::DateAddOne()
{
	if(m_month<12)
	{
		if(m_day+1>DaysOfMonth(m_month))
		{
			m_day=1;
	        m_month=m_month+1;
		}
    	else
			m_day++;
	}
	if(m_month==12)
	{
		if(m_day+1>31)
		{
			m_year++;
		    m_month=1;
			m_day=1;
		}
		else
			m_day++;
	}
}
bool Date::IsLeapYear()
{
   	return ((m_year%4==0&&m_year%100!=0)||(m_year%400==0));
}
int Date::DaysOfMonth(int month)
{
	switch(m_month)
	{
	case 1:
	case 3:
	case 5:
	case 7:
	case 8:
	case 10:
	case 12: return 31; break;
	case 2: if(IsLeapYear())
			{
				return 29;
				break;
			}
		    else
			{
				return 28;
			    break;
			}
	case 4:
	case 6:
	case 9:
	case 11: return 30; break;
    default: return 0;break;
	}
}
void Date::Display()
{
	cout<<m_year<<"年"<<m_month<<"月"<<m_day<<"日"<<endl;
}
void main()
{
	Date date(1998,12,30);
	int choice;
	do
	{
		cout<<"***************"<<endl;
		cout<<"*1--设置日期  *"<<endl;
		cout<<"*2--日期加一天*"<<endl;
		cout<<"*3--输出日期  *"<<endl;
		cout<<"*4--退出      *"<<endl;
		cout<<"***************"<<endl;
		cout<<"请选择:";
		cin>>choice;
		switch(choice)
		{
		case 1:int year,month,day; 
			   cout<<"输入日期(年,月,日之间用空格隔开):";
			   cin>>year>>month>>day;
			   date.SetDate(year,month,day);
			   break;
		case 2:date.DateAddOne();
			        break;
		case 3: date.Display(); 
			       break;
		case 4: exit(0);
		default: break;
		}
	}while(choice!=4);

}