call to member function on null

Standard C ++ does not have real Object-Oriented function pointers. This is a pity, because Object-Oriented function pointers (sometimes called delegates) have proved their value in other languages. In Delphi (Object-Oriented PASCAL Language),

Member function pointers and high-performance C ++ delegation (Part 1) Member function pointers and the fastest possible C ++ delegates Author: Don Clugston Translation: Zhou Xiang Introduction Standard C ++ does not have a real

Http://blog.csdn.net/hairetz/article/details/4153252  First look at this piece of code   Class Test{Public:Test (int I) {m_ I = I ;}Test (){};Void Hello (){Printf ("Hello/N ");}PRIVATE:Int m_ I;}; Int main (){Test * P = new test ();P-> Hello ();P =

Try to analyze the operation of the code is output:#include using namespace Std;class A {public:int m;void print () { cout print ();p a->b ();p a->c (1024x768);p a->m (); return 0;}If you throw the code on the computer to run again, you can find

MFC interface Packaging -- The asserted call of the member function fails when multiple threads are used. I often see the following problems on the Forum:DWORD winapi threadproc (void * pdata) // thread function (for example, used to obtain data

In recent code, I've seen the notation of a member function that calls a null pointer object , which reminds you of the last problem you encountered:How member functions of a C + + class are stored (whether they belong to objects of the class)The

In this regard, let me begin by saying something about:The callback function must be a static member function or a global function to implement a callback function, presumably because a normal C + + member function implies a function parameter, the

Call to a member function get () on null How do I fix this? Class Countcontroller extends controller{ Core algorithms Data collection for user input var $planstart;//scheduled start time var $planend;//Planned End time var $plantime;//planning

Can I call delete in a member function of a class This? The answer is yes, it can be called, and many older libraries have this code. Suppose this member function name is release, and delete this is called in this release method, then this object

Details about call/apply, arguments, and undefined/null methods in JS, argumentsundefined A. Detailed description of call and apply methods-------------------------------------------------------------------------------- Call method: Syntax: call