Question

求C++程序设计：给出一个日期类的定义。其中包含month，day和year三个属性，以及显示日期的函数。

Answer 1

个人认为应该加入日期检测功能

#include <iostream>
using namespace std;
class datestruct
{
public:
	void ShowDate(void);
	void SetDate(void);
private:
	int year;
	int month;
	int date;
	static int days1[];
	static int days2[];
};
int datestruct::days1[]={31,28,31,30,31,30,31,31,30,31,30,31};//非闰年
int datestruct::days2[]={31,29,31,30,31,30,31,31,30,31,30,31};//闰年
void datestruct::ShowDate(void)
{
	cout<<"The date is "<<year<<"."<<month<<"."<<date<<endl;
}
void datestruct::SetDate(void)
{
	int tyear;
	int tmonth;
	int tdate;
	bool flag;
	cout<<"Please enter the year:";
	cin>>tyear;cout<<endl;
	if((tyear%4==0&&tyear%100!=0)||tyear%400==0)
		flag=true;
	else
		flag=false;
	cout<<"Please enter the month:";
	while(1)
	{
		cin>>tmonth;
		if(tmonth>12||tmonth<1)
		{
			cout<<"Please enter an integer between 1~12!"<<endl;
			cout<<"Please enter the month:";
			continue;
		}
		else
			break;
	}//检查月份，设置处理非法月份的输入循环
	cout<<"Please enter the date:";
	while(1)
	{
		cin>>tdate;
		if(flag)
		{
			if(tdate<1||tdate>days2[tmonth-1])
			{
				cout<<"An illegal date!"<<endl;
				cout<<"Please enter the date:";
				continue;
			}
			else
				break;
		}
		else
		{
			if(tdate<1||tdate>days1[tmonth-1])
			{
				cout<<"An illegal date!"<<endl;
				cout<<"Please enter the date:";
				continue;
			}
			else 
				break;
		}
	}//检查日期，包括对于闰年日期的检查
	this->date=tdate;
	this->month=tmonth;
	this->year=tyear;
}
int main(void)
{
	datestruct myDate;
	myDate.SetDate();
	myDate.ShowDate();
	return 0;
}

Answer 2

#include <iostream>

using namespace std;

class Date

{

private:

int year,month,day;

public:

Date(int year,int month,int day)

{

this->year = year;

this->month = month;

this->day = day;

}

void show()

{

cout<<year<<"年"<<month<<"月"<<day<<"日";

}

};