From: "A. Sinan Unur" <sinan DOT unur AT cornell DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Data types
Date: Tue, 20 Jan 1998 21:28:40 -0500
Organization: Cornell University (http://www.cornell.edu/)
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Scott Warner wrote:
> 
> something like
> 
> #include<stdio.h>
> 
> int main(void)
> {
>   int i;
>   char c;
>   float f;
> 
>   printf("Size of integer: %d\n", sizeof(i);
>   printf("Size of char: %d\n", sizeof(c);
>   printf("Size of float: %d\n", sizeof(f);
> 
>   return 0;
> }
> 

you don't need to declare any variables. sizeof(type) is a constant
expression of size_t. incidentally, did you try to compile the above
with -Wall?

  printf("Size of integer: %lu\n", sizeof(int);
  printf("Size of char:    %lu\n", sizeof(char);
  printf("Size of float:   %lu\n", sizeof(float);

etc. is fine.

> (and so on) is the general idea.  I believe sizeof(int) is equivelant > to sizeof(i) in the above.  WORD and DWORD (and the like) are most 
> likely preprocessor macros that you can find if you look carefully 
> through the header files.

people (e.g. Ralph Brown's interrupt list) generally use WORD to mean
16-bits and DWORD to mean 32-bits, contradicting the convention that a
machine word is that computer's natural int size.
-- 
----------------------------------------------------------------------
A. Sinan Unur
Department of Policy Analysis and Management, College of Human Ecology,
Cornell University, Ithaca, NY 14853, USA

mailto:sinan DOT unur AT cornell DOT edu
http://www.people.cornell.edu/pages/asu1/