练习类模板定制时碰到的问题

Question

用date类定制一个模板set<date
但出现如下错误；

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
using namespace std;
class date
{
    int hour, minute, second;
public:
    date(int m_hour, int m_minute, int m_second) :hour(m_hour), minute(m_minute), second(m_second) {};/*同上*/
    friend ostream& operator <<(ostream& os, const date* a)
    {
        os << a->hour << "时" << a->minute << "分" << a->second << "秒" << endl;
        return os;
    }
    
};
template<class type>
class set
{
    type t;
public:
    set(type st) :t(st) {};
    void dispaly()
    {
        cout << t << endl;
    }
};
class set<date>
{
    date*t;
public:
    set(date*st) :t(st) {};
    void dispaly()
    {
        cout << "现在的时间是"<<t << endl;
    }


};
int main()
{
    set<date>d1 = date(17, 3, 36);
        d1.dispaly();
        return 0;
}

Answer 1

#define _CRT_SECURE_NO_WARNINGS

#include <iostream>

using namespace std;

class date {
  int hour, minute, second;

public:
  date(int m_hour, int m_minute, int m_second)
      : hour(m_hour), minute(m_minute), second(m_second){}; /*同上*/
  friend ostream &operator<<(ostream &os, const date *a) {
    os << a->hour << "时" << a->minute << "分" << a->second << "秒" << endl;
    return os;
  }
};

template <class type> class set {
  type t;

public:
  set(type st) : t(st){};
  void dispaly() { cout << t << endl; }
};

template <> class set<date> {
  date *t;

public:
  set(date *st) : t(st){};
  void dispaly() { cout << "现在的时间是" << t << endl; }
};

int main() {
  date d(17, 3, 36);
  set<date> d1 = &d;
  d1.dispaly();
  return 0;
}