use of destructor

Item 7: declare Destructors (destructor) as virtual in polymorphic base classes (polymorphism base class) By Scott Meyers Translator: fatalerror99 (itepub's nirvana) Release: http://blog.csdn.net/fatalerror99/ There are many ways to get the time, so

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

C ++ inherits the calling sequence and virtual destructor of the destructor in the destructor. First, let's talk about the constructor. We all know that the constructor can call member variables, and the Child class in inheritance is to turn the

In C ++, virtual constructor cannot be declared, but virtual destructor can be declared. Polymorphism means that different objects have different behavior characteristics for the same message. As the basis of Runtime polymorphism, virtual functions

Polymorphism is a basic attribute of object-oriented, including static polymorphism (compile phase) and dynamic polymorphism (runtime phase). Static polymorphism mainly refers to the polymorphism of different function parameters, which is a

Document directory The constructor cannot be declared as a virtual function. The Destructor can be declared as a virtual function, and sometimes it must be declared as a virtual function. The constructor cannot be declared as a virtual function.

C + + static correlation and dynamic Association, C + + is how to achieve polymorphismIn real life, there are many examples of polymorphism. Let's analyze how people deal with polymorphism. For example, when a freshman is enrolled in a university,

Declare the destructor of the polymorphism base class as a virtual function. Now we want to consider a timer problem. First we create a base class named timekeeper, and then create various derived classes based on it, so that we can use different

C + + destructor When an object is created, the system automatically calls the constructor to initialize the work, as well as the system automatically calls a function to clean up when the object is destroyed (for example, the various resources

turn from: http://blog.csdn.net/liuning800203/article/details/6455226 Releasing resources with destructors Destructors are used to deconstruct instances of classes. 1 The destructor cannot be defined in the structure. Destructors can only be used