Classes: Constructors And Destructors

Applies To: C++Builder 1 or higher
Category: C++ Language

Classes can optionally include constructors and destructors. A constructor is a function which is called when an object is first created. The destructor is called when the object is destroyed. They cannot return values.

 

Constructors and destructors have the same name as the class, but a destructor is preceded by ~. Here's an example:

 

class List {

public:

    int Count;

    char *Caption;

 

// Add constructor

    List();

 

// Add destructor

    ~List();

};

 

List::List() {

    Count = 10;

}

 

List::~List() {

    Count = 0;

}

 

The constructor initializes the variable Count and the destructor set its value to 0.

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