第三周任务三扩展-蒲公英云

第三周任务三扩展

墨蓝 2022-06-14 07:59 298阅读 0赞

//定义一个日期类
#include<iostream>
using namespace std;
class DateTime
{
public:
    void set_datetime();
    void show_datetime();
private:
    bool judge_year(int);
    bool is_date(int, int, int);
    int day;
    int month;
    int year;
};
int main()
{
    DateTime t1;
    DateTime &t2 = t1;
    t1.set_datetime();
    t2.show_datetime();
    return 0;
}
void DateTime :: set_datetime()
{
    char c1, c2;
    cout << "请输入日期（格式 yy . mm . dd）";
    while(1)
    {
        cin >> year >> c1 >> month >> c2 >> day;
        if(c1 != '.' || c2 != '.')
            cout << "格式不正确，请重新输入" << endl;
        else if(!is_date(year, month, day))
            cout << "日期非法，请重新输入" << endl;
        else 
            break;
    }
}
void DateTime :: show_datetime()
{
    cout << year << "." << month << "." << day << endl;
}
bool DateTime :: is_date(int y, int m, int d)
{
    if(y < 1 || m < 1 || m > 12 || d < 1 || d > 31)
    {
        return false;
    }
    else if(m == 2)
    {
        if(judge_year(y))
        {
            if(d > 29)return false;
        }
        else
        {
            if(d > 28)return false;
        }
    }
    else if(m == 4 || m == 6 || m == 9 || m == 11)
    {
        if(d > 30)return false;
    }
    return true;
}
//定义判断是否为闰年的函数   
bool DateTime :: judge_year(int year)  
{  
 bool leap;  
 if(year % 4 == 0)  
 {  
  if(year % 100 == 0)  
  {  
   if(year % 400 == 0)  
    leap = true;  
   else leap = false;  
  }  
  else  
   leap = true;  
 }  
 else  
  leap = false;  
 return leap;  
}