Interested to Buy Any Domain ? << Click Here >> for more details...
Explain the need for "Virtual Destructor"?
- 2 Answers
- 8289 Views
- Infosys, I also Faced
- E-Mail Answers
Answer Posted / p govind rao
A destructor can be declare virtual. virtual destructor is
mainly useful during inheritance.
class base
{
public:
base(){}
virtual ~base(){}
};
class derv
{ char *p;
public :
derv(){ptr=nes char[2];}
~derv(){delete ptr;}
} ;
main()
{
base *baseptr=new derv();
delete baseptr;
}
If base class, and derived class, and a dynamically
allocated object of type derived is deleted via a pointer
of type base, then derived's destructor will not be invoked
unless base's destructor is virtual.
base *baseptr = new derv();
delete baseptr; // won't invoke B's destructor unless A's
destructor is virtual
| Is This Answer Correct ? | 6 Yes | 0 No |
Post New Answer View All Answers
What is the difference between the parameter to a template and the parameter to a function?
what you know about c++?
Will c++ be replaced?
Explain the use of virtual destructor?
How does c++ structure differ from c++ class?
How long will it take to learn programming?
What is const in c++?
what is software cycle? What is a mission critical system ? What is the important aspect of a real-time system ? Explain the difference between microkernel and macro kernel. Give an example of microkernel.Why paging is used ? Which is the best page replacement algo and Why ? What is software life cycle ? How much time is spent usually in each phases and why Which one do U want to work if selected in Honeywell ? Which are the different types of testing ? What is a distributed system ? Some questions about CSP. Which languages do U know ? What are the differences between Pascal and C. questions from Compiler construction and Lisp. Which are the different computer architecture? What is the requirement in MIMD ? What is the difference between RISC and CISC processors ? Difference between loosely coupled and tightly coupled systems ? What is an open system?
What are guid?
What does the following code do: int c=0; cout< a) Undefined *Updated* b) 01 c) 00
What is a c++ map?
What is c++ manipulator?
Write about the access privileges in c++ and also mention about its default access level?
Define vptr.
Define anonymous class.
