C + + Callback class member function implementation

A callback that implements a class member function is not a static function;

#ifndef __callback_proxy_h_#define__callback_proxy_h_Template<typename TObject, TypeName tparam>classccallbackproxy{typedefvoid(TObject::* cbfun) (tparam*);  Public:                                                                                   voidSet (TObject *pinstance, Cbfun pfun); BOOLExec (tparam*pparam); Private: Cbfun pcbfun; //callback function Pointertobject* m_pinstance;//Call Object}; Template<typename TObject, TypeName tparam>voidCcallbackproxy<tobject, Tparam>::set (tobject*pinstance, Cbfun pfun) {m_pinstance=pinstance; Pcbfun=Pfun;                                                                                                                                                                           } Template<typename TObject, TypeName tparam>BOOLCcallbackproxy<tobject, Tparam>::exec (tparam*pparam) {(M_pinstance->*Pcbfun)                                                       (Pparam); return true;                                                                                                                                                                           } #endif 

Named as: CallbackProxy.h

1#include <iostream>2#include"CallbackProxy.h"3 4 classCTest5 {6  Public:7CTest (intnnum): M_nsum (nnum) {8     }   9     voidCbprintsum (int*pnaddnum) {TenStd::cout <<"The sum is:"<<m_nsum +*pnaddnum <<Std::endl; One     }    A Private: -     intm_nsum; - }; the  -  - intMain () - { +Ccallbackproxy<ctest,int>Cbproxy; -CTest Test (Ten); +Cbproxy.set (&test, &ctest::cbprintsum); A  at     intnum = -; -Cbproxy.exec (&num); -     return 0; -}

Named as: Test.cpp

g++ test.cpp-g-wall &&./a.out

C + + Callback class member function implementation