python class destructor

Constructor and destructor: Using system; Class myclass {private int fnum; Public int num {get {return fnum ;}}/* the constructor has no return value, the default */Public myclass () {This. fnum = 2009;}/* can have multiple constructors with different parameters */Public myclass (int x) {This. fnum = x;} public myclass (Params int [] ARR) {foreach (int I in ARR) This. fnum + = I;}/* The

When the base class is determined to be inherited, it is necessary to declare the Destructor as virtual. When the pointer or reference of the returned derived class is used, calling the Destructor is prone to memory leakage. When the base class is used as a

For objects in the heap, we usually use new/delete to create/destroy objects. When new is called, it automatically calls the constructor of the corresponding class. Similarly, when delete is called, it automatically calls the corresponding class destructor. When we generate objects in the stack, the process described above is automatically completed. That is, we

This problem is occasionally encountered in practice, designing a timekeeper base class and some derived classes to record the time: 1 class TimeKeeper 2 { 3 public: 4　　 TimeKeeper (); 5　　 ~TimeKeeper(); 6 7 }; 8 9 class AtomicClock: public TimeKeeper {}; //原子钟 10 class WaterClock: public TimeKeeper {}; //水钟 When usi

Declare virtual destructor for the polymorphism base class (declare Destructors virtual in polymophic base classes .) If the base class has a non-virtual destructor, the result of deleting a derived class via the base class pointe

Php Basics: Class and object (3) constructor and Destructor. Constructor PHP5 allows developers to define a method in a class as constructor. Classes with constructors call this method each time an object is created, so it is very suitable for using constructors. PHP 5 allows developers to define a method in a class as

The Destructor is not only used in C, but also in C #. It is easy to write. ~ Class Name (){} Let's give you the sample code first ,. We will first create two projects-assemblylibrary (Class Library) and consoltest (console) Assemblylibrary public class DisposaClass //:IDisposable { public string a = "1111"

Class Test (object): def __init__ (self, name): self.name = name print (' This is the constructor ') def Say_hi (self): print (' Hell,%s '% self.name) def __del__ (self): print (' This is destructor ') obj = Test (' Bigberg ') Obj.say_hi () del obj #输出 This is the constructor Hello Bigberg this is a destructor 　　 constructor f

The object does the function parameter//1 studies the copy constructs the//2 to study the constructor function, the destructor call Order//summary construction and the destructor call Order # include "iostream" using namespace Std;class abcd{// This () public:abcd (int A, int b, int c) {this->a = A;this->b = B;this->c = c;printf ("ABCD () construct, A:%d,b:%d,c:

# Include # Include # Include /*Construction and initialization sequence:1. initialize the class members of the base class2. base class Constructor3. class member initialization of a derived class4. derived class Constructor Destruction order:1. Subclass destructor2. Subclass class