实现委托

#include <iostream> using namespace std; template <class T> class A { private: typedef int (T::*delegateFun)(int); T * _This; delegateFun _deleGate; public: //This是被代理的对象, delegateFun是被代理的方法 A(T * This, delegateFun delegatef) { _This = This; _deleGate = delegatef; } //c被代理的参数 int execue(int c) { return (_This->*_deleGate)(c); } }; class B { public: int FunA(int a) {return a + 10;} int FunB(int a) {return a - 10;} B() { } }; int main(int argc, char* argv[]) { B *objB = new B(); A<B> delegateObj1(objB, (&B::FunA)); A<B> delegateObj2(objB, (&B::FunB)); cout << delegateObj1.execue(10); cout << delegateObj2.execue(20); return 0; }