关于function 和 bind 的问题。。。。

[jibee]

为什么main 函数的两条语句不能运行？

#include <iostream>
#include <boost/bind.hpp>
#include <boost/function.hpp>

class GameCharacter4;                              
int defaultHealthCalc2( const GameCharacter4& gc ){} 

class GameCharacter4{
public:
       // HealthCalcFunc is any callable entity that can be called with
       // anything compatible with a GameCharacter and that returns anything
       // compatible with an int:
                     
       typedef boost::function < int ( const GameCharacter4& )> HealthCalcFunc;
       explicit GameCharacter4( HealthCalcFunc hcf = defaultHealthCalc2 )
       :healthFunc( hcf )
       {}       
       int healthValue() const
       { return healthFunc( *this ); }
private:
        HealthCalcFunc healthFunc;
};

class GameLevel{
public:
       int health( const GameCharacter4& ) const  // health calculation
       {}                                          // member function; note
                                                   // non-int return type
       static int health2( const GameCharacter4& ) 
       // health calculation using static member function
       {}
};

class EvilBadGuy4 :public GameCharacter4{};

int main()
{
     
     GameLevel currentLevel;
     EvilBadGuy4 ebg2(  boost::bind( &GameLevel::health, currentLevel,_1 )); // why cant  
         
     EvilBadGuy4 ebg3( &GameLevel::health2 ); // ??? Why can't it work
     return 0;
}

[realyigo]

try this boy.

class GameLevel{
public:
int health( const GameCharacter4& ) const // health calculation
{
return 1;
} // member function; note
// non-int return type
static int health2( const GameCharacter4& )
// health calculation using static member function
{
return 1;
}
};

class EvilBadGuy4 :public GameCharacter4
{
public:
explicit EvilBadGuy4( HealthCalcFunc hcf = defaultHealthCalc2 )
:GameCharacter4(hcf)
{}
};

[太乙]

汗~~帮顶！友情up~

[珍惜生命远离CPP]

你只是构造了一个函数对象.
ebg2( 参数 );才行
ebg3( 参数 );

[jieao111]

class EvilBadGuy4 :public GameCharacter4{};
是什么意思？
还有构造函数不能继承，要在派生类构造函数中显示调用基类的构造函数