c++编程定义一个日期的类cdate,该类含私有变量year,month,day和公有成员函数——

Question

定义一个日期的类cdate,该类含私有变量year,month,day和公有成员函数——构造函数，析构函数和打印函数print(),且要求成员函数定义在体外。

Answer 1

class cdate
{private:int year,month,day;
public:cdate();
~cdate();
void set(int y,int m,int d);
void print();

};

cdate::cdate()
{
cout<<"construct object!";
}
cdate::set(y,m,d)
{
year=y;
month=m;
day=d;
}
cdate::print()
{
cout<<year<<'-'<<month<<'-'<<day<<endl;
}

cdate::~cdate()
{
cout<<"destruct object!"<<endl;
}

Answer 2

class cdate
{
public:
void print();
cdate () year(1900),month(1),day(1){}
private:
int year;
int mont;
int day;
};
void cdate::print()
{
std::cout<<year<<'\'<<month<<'\'<<day<<endl;
}

Answer 3

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