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constructor and destructor

This is a discussion on constructor and destructor within the C and C++ forums, part of the Software Development category; What is the difference between constructor and destructor?...


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  #1 (permalink)  
Old 12-31-2008
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constructor and destructor

What is the difference between constructor and destructor?
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Old 01-02-2009
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Re: constructor and destructor

Constructor is used to initialize the class variable and create the object of the class.
Destructor is used to free the memory which was assigned to object while creating object.
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Old 02-03-2009
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Re: constructor and destructor

ya its same as the answer but slight modification in destructor.
constructor initilises the object where as
destructor cleans up the object.

and we need to define destructor if u have pointers and DMA
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Old 02-03-2009
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Re: constructor and destructor

Constructor is used to initialize variables. You can invoke a constructor becofe giving a call to any other method or program

Destructor is used to free the memomry by clearing up the variable values and setting them to NULL.
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Old 03-01-2009
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Re: constructor and destructor

Characterstics of Constructor:
1)They should be declared in the public section.
2)They are invoked automatically when the objects are created.
3)They do not have return types,not even void and therefore,they cannot return values.
4)They cannot be inherited.through a derived class can call the base class constructor.
5)Like other C++ function,they can have default argument.
6)Constructor cannot be virtual.
7)We cannot refer to their address.
8)an object with a constructor connot be used as a member of a union.
9)They make implicit calls to the operators new and delete when memory allocation is required.
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Old 03-01-2009
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Re: constructor and destructor

[quote=emrold.j;42034]Characterstics of Constructor:
1)They should be declared in the public section.
2)They are invoked automatically when the objects are created.
3)They do not have return types,not even void and therefore,they cannot return values.
4)They cannot be inherited.through a derived class can call the base class constructor.
5)Like other C++ function,they can have default argument.
6)Constructor cannot be virtual.
7)We cannot refer to their address.
8)an object with a constructor connot be used as a member of a union.
9)They make implicit calls to the operators new and delete when memory allocation is required.
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Old 03-22-2009
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Re: constructor and destructor

the specially linked attributes which are used in the under the same name, in which they have the access to the different member of the same.
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Old 03-28-2009
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Re: constructor and destructor

Constructor is used to initialize the variables and destructor is used to free the memory of that variables.
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Old 04-06-2009
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Re: constructor and destructor

constructor has the same name as the class use to initiate the objects. destructor has the tild and the same name as the class use to free the memory. Destructor is by default executed by garbage collector.
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