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01_final keyword concept and four usages The final keyword represents the final and unalterable. There are four common uses: Can be used to decorate a classCan be used to modify a methodIt can also be used to modify a local variableIt can also be used to modify a member variable 02_ The final keyword is used to decorate a class When th ...

First, link to several blog addresses: Analysis of C + + virtual function table cout << "Virtual function table address:" << (int*)(&b) << endl; cout << "Virtual function table - first function address:" << (int*)*(int*)(&b) << endl; In this blog, cout < < virtual function table add ...

1, Object oriented Object oriented is the core idea of Java programming. Its basic characteristics are inheritance, encapsulation and polymorphism. 1. Feature encapsulation The structure, data and operation are encapsulated in the object entity. When using, you can not pay attention to the internal structure of the object and can only access ...

1, What is polymorphism The three characteristics of object-oriented are encapsulation, inheritance and polymorphism.Definition of polymorphism: parent class reference variables can point to subclass objects, allowing different objects to call the same method, that is, the same method can have different implementation forms according to differ ...

catalogue 1: Concept of C + + polymorphism   2: Implementation of C + + polymorphism 3: C + + virtual function 1. Items needing attention when using virtual functions           2. Pure virtual function 1: Concept of C + + polymorphism           "Polymorphism" means ...

java inheritance and polymorphism preface Tip: the following is the main content of this article. The following cases can be used for reference 1, What is inheritance? If class B has all the attributes and methods of class A, and has some special attributes and methods, class A is called a general class. Class B is called a spec ...

Program requirements 1. Write a Cat class and implement a shout() method, which can output the kitten's meow 2. Modify the above program to declare a field name and a constructor with parameters for Cat class, so that the name of the object can be set when instantiating the object; It also enables the shot () method to output the name of the ...