Interested to Buy Any Domain ? << Click Here >> for more details...
Do we have private destructors?
- 12 Answers
- 23353 Views
- Symphony, TCS, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / sampurna pandey
yes, we can have both private constructor and destructor
and can use them with help of static function for example
class Base
{
static int i;
Base(){}
~Base(){}
public:
static Base *Creat_Object();
static void Destroy_Object(Base *p);
void Add()
{
cout<<i<<" Add function"<<endl;
}
};
int Base::i=0;
Base* Base::Creat_Object()
{
Base * ptr = new Base();
i=5;
return ptr;
}
void Base::Destroy_Object(Base *p)
{
delete p;
}
void main()
{
Base *temp = Base::Creat_Object();
temp->Add();
Base::Destroy_Object(temp);
}
correct me if i am wrong.
| Is This Answer Correct ? | 21 Yes | 3 No |
Answer / guest
RE: #1
You can have private constructors. It's pretty common
practice when you create a class which you want to never be
constructed with "new" from outside the class (for example,
if you have a static factory member of the class).
| Is This Answer Correct ? | 10 Yes | 1 No |
Answer / vaibhav meena
We can have Private Destructor and by using Friend Function
we can also instantiate it. :)
| Is This Answer Correct ? | 6 Yes | 0 No |
Answer / subrat
Hi all,
Please visit this url for more clarity on "Private
destructors"
http://www.codeguru.com/cpp/cpp/cpp_mfc/stl/article.php/c414
3/
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / binoy mathew
#include <iostream>
#include <stdlib.h>
class t
{
public:
t()
{
printf("in constr");
}
private: // note that constructor is private here
~t()
{
printf("in destr");
}
};
int main()
{
t *t1 = new t; // create a new obj
delete t1; // delete the obj, which calls destructor
return 0;
}
Try to compile the above code.
following error results...
[root@localhost Desktop]# g++ test.cpp
test.cpp: In function ‘int main()’:
test.cpp:13: error: ‘t::~t()’ is private
tt.cpp:: error: within this context
[root@localhost Desktop]#
....implies, we can't have destructor private.
| Is This Answer Correct ? | 1 Yes | 3 No |
Answer / shakti singh khinchi
U can't instantiate instance of that class.
| Is This Answer Correct ? | 0 Yes | 3 No |
Answer / vishwa
we cannot say it destructors are not private. because for
empty class if we use delete operator then it is going to
delete the destructor which is private.
| Is This Answer Correct ? | 0 Yes | 8 No |
Answer / thuang
In replay to Vishwa,
for empty class, compiler will supply a default constructor
and a destructor for us, their access modifiers were public.
| Is This Answer Correct ? | 0 Yes | 8 No |
Answer / pooja
no we do not have private destructors because the
destructors can be declared only in public access
specifier.
| Is This Answer Correct ? | 1 Yes | 11 No |
What is the word you will use when defining a function in base class to allow this function to be a polimorphic function?
Which software is best for coding?
How would you stop a class from class from being derived or inherited?The constructer should not be Private,as object instantiation should be allowed.
Can class objects be passed as function arguments?
In how many ways we can initialize an int variable in C++?
What is the difference between cin.read() and cin.getline()?
Which one is a preferred language C or C++? Why?
What are the five types of inheritance in C++?
What is c++ flowchart?
Explain the difference between abstract class and interface in c++?
Which is best c++ or java?
How do you find out if a linked-list has an end? (I.e. The list is not a cycle)
STL 
