C++編寫日期類

#include
using namespace std;


class Data
{
public:
void InitData(int year, int month, int day)
{
_year = year;
_month = month;
_day = day;
}
void PrintData()
{
cout << _year << "-" << _month << "-" << _day << endl;
}
     
private :
int _year;
int _month;
int _day;
};
int main()
{
Data d;//創建對象(類實例化)
d.InitData (2017, 2, 18);
d.PrintData();
system("pause");
return 0;

}