#include <algorithm> class TestClass { public:  int Sub(int x, int y) {   return y - x;  }  void InitAndTest() {   PrintWithClassMemberFunction(&TestClass::Sub);   PrintWithClassPointer(this);  }  // call: PrintWithClassMemberFunction(&TestClass::Sub);  void PrintWithClassMemberFunction(int (TestClass::*f)(int, int)) {   // add 'this' pointer   auto rel = (this->*f)(12, 13);   AtlTrace("[%d]\n", rel);   // bind with member function pointer into map   auto funBind = std::bind(f, this, std::placeholders::_1, std::placeholders::_2);   m_mapFun["PrintWithClassMemberFunction"] = funBind;  }  void PrintWithClassPointer(TestClass *pointInstance) {   auto rel = pointInstance->Sub(20, 30);   AtlTrace("[%d]\n", rel);   auto funBind = std::bind(&TestClass::Sub, pointInstance, std::placeholders::_1, std::placeholders::_2);   m_mapFun["PrintWithClassPointer"] = funBind;  }  void CallBindFun(int a, int b) {   std::for_each(    m_mapFun.begin(), m_mapFun.end(), [&a, &b](decltype(*m_mapFun.begin()) it) {     AtlTrace("[%s] %d\n", it.first.c_str(), it.second(a, b));   });  }  std::map<std::string, std::function<int (int, int)>> m_mapFun; }; int _tmain(int argc, _TCHAR* argv[]) {  TestClass tc;  tc.InitAndTest();  tc.CallBindFun(64, 128); }