destructors in c++

1. BY
T.DEEPIKA M.SC(INFO TECH)
NADAR SARASWATHI COLLEGE OF ARTS
ANDSCIENCE

2. What is destructor?
 A destructor is a special member function that is
called when the lifetime of an object ends.
 The purpose of the destructor is to free the resources
that the object may have acquired during its lifetime.

3. DEFINITION OF DESTRUCTOR:
A Destructor is used to destroy the objects
that have been created by constructor.
Like a constructor the destructor is a
member function whose name is the same
as the class name but is preceded by a
tilde.

4. FOR EXAMPLE:
The destructor for the class integer can be
Tell in or defined in
~integer(){}
• We define the destructor by the symbol
“TILDE”(~).

5. A Destructor never takes any arguments
nor does it return any value
Destructor are mainly used for in future
use for memory space.

6. • Implicitly by the complier exit from the
program to clean up storage that is for no
longer accessible.
• In constructor allocate the memory by
using “new” and “delete” used to delete
memory.

7. PROGRAM LOGIC:
Matrix::~matrix()
{
For(int i=0;i<d1;i++)
Delete p(i);
Delete p;
}

8. A Destructor is not called implicitly.
Destructor mainly used for destroy the
object.

9. Destructor in c++:
 A destructor is called for a class object when that
object passes out of scope or is explicitly deleted
 It is mainly used for deallocate memory and clean up
the class object and its class members.

10. C++
 A destructor is a special method called automatically
during the destruction of an object.
 Actions executed in the destructor include the following:
 Recovering the heap space allocated during the lifetime of
an object.
 Closing file or database connections.
 Releasing network resources.

11. Overload destructor
 Destructor is mainly used to delete the object
and so only one time to call destructor when the
overloading is not occur
 Destructor it needs to call when you destroy an
object