发现每天都能碰到问题，拜托你们了，又麻烦了

#include <iostream.h>

class Tdate
{
    public:
        void set(int m,int d, int y)
        {
            month=m;  day=d;  year=y;
        }
        bool Isleapyear()
       {
            if((year%4==0&&year%100!=0)||(year%400==0))
                return true;
            else
                return false;
        }
        void print()
        {
            cout<<month<<"/"<<day<<"/"<<year<<endl;
        }
    private:
        int month;  int day;  int year;
};
void main()
{
    Tdate a;
    a.set(10,1,1949);
    a.print();
    if(a.Isleapyear)                        //这条语句有问题？ 不管输入哪年 都是输出这句话。该这么改呢
        cout<<"It is a leap year!"<<endl;
    else
        cout<<"It is not a leap year!"<<endl;
}