to n6002，前面写的有点问题http://www.csdn.net/expert/Topic/182/182496.shtm

[plato]

改成

class Base
{
public: virtual void do();
};

class Cooperate
{
public: virtual void cooperate();
}

class A: public Base, Cooprate{
public:
virtual void cooperate(){ this->do(); b->do(); }
void do(){ printf("a");}
}

class B: public Base, Cooperate{
public:
virtual void cooperate(){ this->do(); c->do(); }
void do(){ printf("b");}
}

class clsMain
{
public:
void doByControlOf(Cooperate *b)
{
b->cooperate();
}
}

[n6002]

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