Question

c++问题 创建一个类

要求 写构造函数，复制构造函数和析构函数 判断闰年 对于给定的日期可以判定是一年中的哪一天

Answer 1

#include<iostream>
#include<stdlib.h>
using namespace std;
class date
{
public:
int year;
int month;
int day;
date(){year=2012;month=1;day=1;}
date(int y,int m,int d){year=y;month=m;day=d;}
date(date &d){year=d.year;month=d.month;day=d.day;}
bool isleap()
{
if(year%400==0||(year%4==0&&year%100!=0))
return true;
return false;
}
~date(){};
};
int main()
{
system("title by lyz810 &color 1e");
date d1,d2(2012,4,23),d3(d2);
cout<<"d1:"<<d1.year<<'-'<<d1.month<<'-'<<d1.day<<endl;
cout<<"d2:"<<d2.year<<'-'<<d2.month<<'-'<<d2.day<<endl;
cout<<"d3:"<<d3.year<<'-'<<d3.month<<'-'<<d3.day<<endl;
if(d1.isleap())cout<<d1.year<<"是闰年";
else cout<<d1.year<<"不是闰年";
}

Answer 2

include<iostream>
#include<stdlib.h>
using namespace std;
class date
{
private:
int year;
int month;
int day;
public:
date(int y=0,int m=0,int d=0){year=y;month=m;day=d;}
date(date &d){year=d.year;month=d.month;day=d.day;}
bool isleap()
{
if(year%400==0||(year%4==0&&year%100!=0))
return true;
return false;
}
void show_date()
{
cout<<year<<'-'<<month<<'-'<<day<<endl;
}
~date(){};
};
int main()
{
system("title by lyz810 &color 1e");
date d1,d2(2012,4,23),d3(d2);

cout<<"d1:";
d1.show_date();
cout<<"d2:";
d2.show_date();
cout<<"d3:";
d3.show_date();

if(d1.isleap())cout<<d1.year<<"是闰年";
else cout<<d1.year<<"不是闰年";
return 0;
}

Answer 3

同上