stl set问题
最近需要使用到有序集合，使用了SET。
遇到编译不过的初级问题，代码如下。请帮忙看看，感激不尽，
。
。
#include <set>
class Player
{
public:
Player(const Player& player)
{
this->m_experience = player.m_experience;
this->m_gpID = player.m_gpID;
this->m_level = player.m_level;
this->m_ulPlayerID = player.m_ulPlayerID;
};
Player(const unsigned long playerID, const unsigned long gpID,
const unsigned long experience, const unsigned char level):
m_ulPlayerID(playerID),m_gpID(m_gpID),
m_experience(experience), m_level(level){}
bool operator < (const Player &player) const
{
return (this->m_level<player.m_level);
}
Player& operator = (const Player &player)
{
if (&player == this)
{
return (*this);
}
this->m_experience = player.m_experience;
this->m_gpID = player.m_gpID;
this->m_level = player.m_level;
this->m_ulPlayerID = player.m_ulPlayerID;
return (*this);
}
private:
unsigned long m_ulPlayerID;
unsigned long m_gpID;
unsigned long m_experience;
unsigned char m_level;
};
int _tmain(int argc, _TCHAR* argv[])
{
std::set<Player&> m_sPlayers;
return 0;
}
Error：
c:\program files\microsoft visual studio 10.0\vc\include\xmemory(137): error C2528: “pointer”: 指向引用:最近需要使用到有序集合，使用了SET。
遇到编译不过的初级问题，代码如下。请帮忙看看，感激不尽，。
#include <set>
class Player
{
public:
Player(const Player& player)
{
this->m_experience = player.m_experience;
this->m_gpID = player.m_gpID;
this->m_level = player.m_level;
this->m_ulPlayerID = player.m_ulPlayerID;
};
Player(const unsigned long playerID, const unsigned long gpID,
const unsigned long experience, const unsigned char level):
m_ulPlayerID(playerID),m_gpID(m_gpID),
m_experience(experience), m_level(level){}
bool operator < (const Player &player) const
{
return (this->m_level<player.m_level);
}
Player& operator = (const Player &player)
{
if (&player == this)
{
return (*this);
}
this->m_experience = player.m_experience;
this->m_gpID = player.m_gpID;
this->m_level = player.m_level;
this->m_ulPlayerID = player.m_ulPlayerID;
return (*this);
}
private:
unsigned long m_ulPlayerID;
unsigned long m_gpID;
unsigned long m_experience;
unsigned char m_level;
};
int _tmain(int argc, _TCHAR* argv[])
{
std::set<Player&> m_sPlayers;
return 0;
}
Error：
c:\program files\microsoft visual studio 10.0\vc\include\xmemory(137): error C2528: “pointer”: 指向引用的指针非法
1> c:\program files\microsoft visual studio 10.0\vc\include\set(25): 参见对正在编译的类 模板 实例化“std::allocator<_Ty>”的引用
1> with
1> [
1> _Ty=Player &
1> ]
1> c:\program files\microsoft visual studio 10.0\vc\include\xtree(451): 参见对正在编译的类 模板 实例化“std::_Tset_traits<_Kty,_Pr,_Alloc,_Mfl>”的引用
1> with
1> [
1> _Kty=Player &,
1> _Pr=std::less<Player &>,
1> _Alloc=std::allocator<Player &>,
1> _Mfl=false
[解决办法]
为什么不用指针呢？
[解决办法]
#include <set>
class Player
{
public:
Player(const Player& player)
{
this->m_experience = player.m_experience;
this->m_gpID = player.m_gpID;
this->m_level = player.m_level;
this->m_ulPlayerID = player.m_ulPlayerID;
};
Player(const unsigned long playerID, const unsigned long gpID,
const unsigned long experience, const unsigned char level):
m_ulPlayerID(playerID),m_gpID(m_gpID),
m_experience(experience), m_level(level){}
bool operator < (const Player &player) const
{
return (this->m_level<player.m_level);
}
Player& operator = (const Player &player)
{
if (&player == this)
{
return (*this);
}
this->m_experience = player.m_experience;
this->m_gpID = player.m_gpID;
this->m_level = player.m_level;
this->m_ulPlayerID = player.m_ulPlayerID;
return (*this);
}
private:
unsigned long m_ulPlayerID;
unsigned long m_gpID;
unsigned long m_experience;
unsigned char m_level;
};
struct cmp
{
inline bool operator()(const Player* a, const Player*b){ return *a<*b; }
};
int main(int argc, char* argv[])
{
std::set<Player*,cmp> m_sPlayers;
return 0;
}
