258 inline函数

#include"iostream"
#include"iomanip"
using namespace std;
class Date
{
 int year, month, day;
public:
 void set(int x, int y, int z)
 {
  year = x;
  month = y;
  day = z;
 }
 bool isleapyear();
 void print()
 {
  cout << setw(4) << year << '-' << setw(2) << '-' << month << '-' << setw(2) << day << endl;
 }

};

 inline bool Date::isleapyear()
{
 return(year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
}

int main()
{
 Date d;
 d.set(2018, 5, 5);
 if (d.isleapyear())
  d.print();
 else cout << "爷爷不是闰年" << endl;
 system("pause");
 return 0;

}