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Doubt in Size of Class ??


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shabbir_saiyed@... Posted: Fri Jul 18, 2003 4:48 pm


Joined: 10 Jul 2003

Posts: 4
Doubt in Size of Class ??
Compiler :
Turbo C++ 3.0 ,
Visual C++ 6.0,
Borland C++ 5.02 ,
G++ 2.x

Hello friends,
I have compiled my program on all above compiler
but i`m getting same answer `1` .why?
if you declare char variable inside class definition then also
answer is same `1` .why?
why size of empty class is one ?? why not zero ???
why compiler need atleast one byte to define a class ???
please clear my doubt .



#include<iostream.h>
class abc
{
};
int main()
{
cout<< sizeof(abc);
return 0;
}
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tvmanikandan Posted: Fri Jul 18, 2003 4:55 pm


Joined: 18 Jul 2003

Posts: 2
Doubt in Size of Class ??
If the class has size ZERO then all the instances ( ie ,objects)refer to the
same location.So while deleting the objects it will become a problem.
So,As a minimum the compiler allocates 1 byte for the class if it doesn`t have
any member/virtual function.

Mani
______________________________ Reply Separator _________________________________
Subject: *[&Programmers-Town&]* Doubt in Size of Class ??
Author: shabbir.saiyed (shabbir_saiyed@...) at internet
Date: 7/18/03 5:18 PM


Compiler :
Turbo C++ 3.0 ,
Visual C++ 6.0,
Borland C++ 5.02 ,
G++ 2.x

Hello friends,
I have compiled my program on all above compiler
but i`m getting same answer `1` .why?
if you declare char variable inside class definition then also
answer is same `1` .why?
why size of empty class is one ?? why not zero ???
why compiler need atleast one byte to define a class ???
please clear my doubt .



#include<iostream.h>
class abc
{
};
int main()
{
cout<< sizeof(abc);
return 0;
}
___________________________________________________
Download the hottest & happening ringtones here!
OR SMS: Top tone to 7333
Click here now:
http://sms.rediff.com/cgi-bin/ringtone/ringhome.pl





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