define default constructor

Construction operations of default constructor in the C ++ object model, and object model constructorA class. If there is no user-declared constructor, a default constructor is implicitly declared. The implicitly declared constructor determines when

I have two misconceptions about the C + + default constructor: If a class does not define any constructors, the compiler (definitely!) will define a composite default constructor for the class. The composite default constructor initializes all the

C ++ Object Model -- Construction of Default Constructor (chapter 2)Chapter 2 The most common complaint about C ++ In The constructors of Constructor is that The compiler has done too many things on The back of programmers. the Conversion operator

The C ++ compiler combines the conditions of the default constructor (the default copy constructor is the same), and the constructor copies the constructor. When a user does not define a constructor for a class, the compiler does not combine each

A class, if there is no constructor for the user declaration, then a default constructor is implicitly declared. The implicit declaration of the constructor, exactly when to be synthesized, by the compiler composition of the default constructor

Error: Implicit super constructor People () is undefined for default constructor. Must define an explicit constructor, explicitconstructor When a subclass inherits the parent class, if the parent class does not define a constructor with parameters,

Misunderstanding of default constructors1. When the program ape defines the default constructor, the compiler will directly use this default constructor.A simple exampleClass Student;Class School{Public:School (){}...Student students;};We know that

In C ++, constructor is a special function called when the component object is called. Its purpose is to initialize the object, so that the object can be in a reasonable State before it is used. However, the design of constructor functions is not

C + + terms-everything about the default constructorDefault constructor (Defaultconstructor):The default constructor is the constructor that is used to create the object when no display initial value is provided. If no constructors are provided, C +

When a subclass inherits the parent class, if the parent class does not have a constructor that defines the parameter, the subclass can inherit the default constructor of the parent classWhen a constructed method with parameters is defined in the