Constructors and destructors are special member functions in C++. Constructors are used to initialize objects and are called automatically when an object is created. They have the same name as the class. Destructors are used to destroy objects and are called when an object is deleted or destroyed. They are identified by a tilde symbol preceding the class name and have no parameters. The key differences between constructors and destructors are that constructors allocate memory while destructors deallocate it, constructors can be overloaded while destructors cannot, and destructors require a tilde symbol for identification.

1. WELCOME

2. CONSTRUCTOR AND DESTRUCTOR
What is Constructor?
Constructorisbasicallyaspecial
memberfunctionhavingsamename
asthatofclass.

3. PROPERTIES OF CONSTRUCTORS
• A constructor has the same name as that of class
• Constructor doesn’t have a return type not even void
• Like normal functions Constructor have default argument.
• They may not be static
• They cannot be inherited.
• They are executed automatically whenever objects of class are created.
• We can declare more than one constructor in a class

4. Syntax of constructor in C++
class CLASSNAME
{
…………….
}
Public:
CLASSNAME([parameter list])
{
…………….
}
};
class student
{
…………….
}
Public:
student ()
{
…………….
}
};

5. WHAT IS DESTRUCTOR?
A destructor is a member function having same name as that
of Constructor but followed by a tilde(~) symbol.

6. PROPERTIES OF DESTRUCTOR
A destructor has the same name as that of a class or constructor to which it belong
followed by tilde sign.
It is executed automatically and is used to destroy the objects of class.
It takes neither parameter nor any value.
There is only one constructor in a class
It cannot be overloaded.
It cannot be declared static or const.
They cannot be inherited.

7. Syntax of destructor in C++
Class CLASSNAME
{
………..
Public:
CLASSNAME()
//DESTRUCTOR DECLARATION
{
………………..
}
~CLASSNAME()
// DESTRUCTOR DEFINITION
{
}
};

8. DIFFERENCE BETWEEN CONTRUCTOR & DESTRUCTOR
CONSTRUCTOR
• Constructor allocates the memory
• They can have arguments
• Overloading is possible
• No special symbol needed for
recognition
• Classname(arguments)
{
// body of Constructor
}
DESTRUCTOR
• Destructor deallocates the memory
• They cannot have arguments.
• No overloading possible
• Tilde symbol needed for recognition
• ~classname()
{
…………………
}

9. THANKS