class pointer

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Obtain the summary of the MFC window pointer Method

Obtain CWinApp:-Directly call AfxGetApp () or use theApp in CMainFrame, CChildFrame, CDocument, and CView-Only AfxGetApp () can be used in other classes () Obtain CMainFrame:-Use AfxGetMainWnd () or m_pMainWnd in CMinApp-GetParentFrame () is

Sub-class pointers to C + + point to parent class

1, reference base class object directly with base class pointer2, referencing derived class objects directly with derived class pointers3, reference a derived class object with a base-class pointer, because the derived class object is also an object

Virtual functions in C + +

in the degree Niang there found a cow man's answer, copied over http://zhidao.baidu.com/link?url=AhjH4Os7ixE7gzWxChCLyd13yQGdb47dAbSm_p1BsyKmh4_ _qlctwornkwig5x9ksdg4tymasp1syknrf47odqVirtual functions in C + + While it is difficult to find a C + +

C ++ overload, overwrite, and hide

Features of member functions being overloaded:(1) the same range (in the same class );(2) The function name is the same;(3) parameters are different;(4) virtual keywords are optional.Override refers to the function of a derived class that overwrites

Methods for obtaining other class pointers in the MFC window

Access other classes of the applicationObtain cwinapp:-Directly call afxgetapp () or use theapp in cmainframe, cchildframe, cdocument, and cview-Only afxgetapp () can be used in other classes ()Obtain cmainframe:-Use afxgetmainwnd () or m_pmainwnd

Obtaining and applying various types of pointers in the MFC class (2)

The access between documents, views, and frameworks in MFC has been a common topic, but I don't think there are any detailed descriptions.    For those with poor English, I checked some blogs and summarized them! I hope it will be helpful to people

Usage of pointers in the MFC application view Framework Document Status Bar

  1) Get the doc pointer in the view2) obtain the mainframe pointer in the app3) obtain the mainframe pointer in the view.4) obtain the view (created) pointer5) Get the pointer to the current document6) Get the status bar and toolbar

function hiding in C + +

As long as the base class has declared the Virtue keyword when defining a member function, when overridden by a derived class, the Virtue keyword can be added without affecting the implementation of the polymorphic.Easy to confuse with

The function and principle analysis of base class virtual destructor in C + +

The theoretical premise of virtual destructor isAfter executing the destructor of the subclass, the fictitious function of the parent class is bound to be executed.Then when you use Delete to release a subclass object that is instantiated by a

Use of pointers in MFC applications

Original address: http://www.vckbase.com/index.php/wv/459 1) Get doc pointer in view2) Get mainframe pointer in app3) Get mainframe pointer in view4) Get the view (established) pointer5) Get the current document pointer6) Get the

How c ++ constructor works

# Include Class A {int A; public: A (int x): A (x) {cout B(int v): b(v),y(b+2),x(b+1), d(b),A(v){ c=v; cout What does this code output?1 first a (v) is 12 a x: 23 a y: 34 B (INT V): 1 1 1 c5 ~ B (): d6 A y analysis structure:

How to obtain each other between document, view, window, and custom classes

1) Get the doc pointer in the view 2) obtain the mainframe pointer in the app 3) obtain the mainframe pointer in the view. 4) obtain the view (created) pointer 5) Get the pointer to the current document 6) Get the status bar and toolbar pointer 7)

Common Problems With downcast using dynamic_cast in C ++ [rtti]

The type conversion under polymorphism is used for a question in the exercise class for freshman students. For the type conversion of multi-state inheritance, there are two types of conversion: upcast and downcast. The difference between the two

Virtual and pure virtual functions

Virtual functions are an important concept in Object-Oriented C ++. Because it fully embodies the inheritance and polymorphism features in object-oriented thinking, it is widely used in C ++. For example, in Microsoft's MFC class library, you will

C + + base class pointers, sub-class pointers, polymorphic

Assigning values between a base-class pointer and a child-class pointer(1) When assigning a subclass pointer to a base class pointer, no forced type conversion is required, and the C + + compiler automatically casts the type. Because the child class

4 types of coercion type conversions in C + +

Four types of coercion for C + + are converted to: static_cast, Const_cast, reinterpret_cast, and dynamic_cast General form of type conversion: Cast-name Static_castAny explicitly defined type conversions can use static_cast as long as

C + + When the method of a subclass is the same as the method of the parent class ...

C + + When the member function of a subclass has the same name as the member function of the parent class:If the parent class does not have a virtual declaration, the subclass function can be different from the parent class function return value,

Some programming tips and details for C + +

1, sometimes, the function of many parameters, it is best to also line , such as:CreateProcess (NullCmdbuf,NullNullBINHH,Dwcrtflags,Envbuf,Null&sistartinfo,&prinfo);The number of parameters of the function is best not too much, generally speaking 6

The role of virtual function

You can let member function operations generalize, with pointers to the base class pointing to objects of different derived classes,When a base-class pointer calls its virtual member function, it calls the member function that actually points to the

Methods for obtaining other class pointers in the MFC window

Methods for obtaining other class pointers in the MFC window Source: China self-learning Programming Network Release Date: 2008-09-26 Obtain CWinApp:-Directly call AfxGetApp () or use theApp in CMainFrame, CChildFrame, CDocument,

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