，我建议你使用boost :: function为手头的任务。

If you can use boost libraries, I would suggest you use boost::function for the task at hand.

class A {
public:
   void doSomething( boost::function< void ( int ) > callback )
   {
      callback( 5 );
   }
};

然后任何继承（或外部类）都可以使用boost :: bind做调用：

Then any inheriting (or external class) can use boost::bind do make a call:

class B {
public:
   void my_method( int a );
};
void test()
{
   B b;
   A a;
   a.doSomething( boost::bind( &B::my_method, &b, _1 ) );
};

我没有检查确切的语法，我从顶部输入，至少接近正确的代码。

I have not checked the exact syntax and I have typed it from the top of my head, but that is at least close to the proper code.