成員函數 指標

class AbstractMethod
{
public:
 virtual void show(){}  // = 0;  // 可以是純虛函數，這裡為了測試方便不使用純虛函數！

 void fun()
 {
  cout << "I was called!" << endl;
 }

 void fun1()
 {
  cout << "I was called!" << endl;
 }
};

int main()
{
 // 定義成員函數指標類型
 typedef void (AbstractMethod::*MFP)(void);

 // 轉化函數指標為別的指標
 MFP mfp1 = &AbstractMethod::show; 
 unsigned* tmp =  (unsigned*)&mfp1;
 cout << hex << *tmp << endl;

 MFP mfp2 = &AbstractMethod::fun;
 tmp = (unsigned*)&mfp2;
 cout << hex << *tmp << endl;

 MFP mfp3 = &AbstractMethod::fun1;
 tmp = (unsigned*)&mfp3;
 cout << hex << *tmp << endl;

 // 通過轉化後的指標調用成員函數
 AbstractMethod am;
 MFP* addr = (MFP*)tmp;
 (am.*mfp3)();
 (am.*(*addr))();

 return 0;
}