Re: [Dev-C++] Unsigned and signed

[jansb000 <jan...@wx...>]

Yep, just try this program:

#include <stdio.h>
int main() {
    printf("%d", sizeof(int));
}

For a more complete version of this program look at:
http://wcs-jabe.sourceforge.net/source/html/global_8h-source.html
http://wcs-jabe.sourceforge.net/source/html/globmain_8cpp-source.html

This is a program that I wrote to test the size of variables on =
different platforms (C++).

As far as I know an int is always the size that can be handled most =
easily by the CPU but minimal 16 bits. So, on the new Intel processor (I =
believe its the MERCAD) an int may be 64 bits since it is a 64-bit CPU. =
Some super computers also have 64-bit ints.

If you write cross-platform code then you should use 16-bit for integer =
(as an assumption), but you can never count on it that it will occupy =
just 2 bytes of memory.
  ----- Original Message -----=20
  From: Daniel Glenfield=20
  To: jan...@wx...=20
  Sent: Friday, October 19, 2001 9:06 PM
  Subject: Re: [Dev-C++] Unsigned and signed


  that's it, knew I had the first 2 numbers right.

  so you're telling me that a 32-bit machine can hold even greater =
values for int ? great, that's something my course never told me!



  >From: "jansb000"=20
  >To: "Daniel Glenfield"=20
  >Subject: Re: [Dev-C++] Unsigned and signed=20
  >Date: Fri, 19 Oct 2001 21:03:21 +0200=20
  >=20
  >You mean its -32768 to +32767 for signed and +65535 for unsigned.=20
  >However that is only for 16-bit numbers. In DevC++/MingW32 an integer =
is by default 32-bit. On other machines it may be even 64-bit.=20
  > ----- Original Message -----=20
  > From: Daniel Glenfield=20
  > To: dev...@li...=20
  > Sent: Friday, October 19, 2001 5:08 PM=20
  > Subject: RE: [Dev-C++] Unsigned and signed=20
  >=20
  >=20
  > int holds any number from -32,332 to +32,332 (not sure about last 3 =
digits in each)=20
  >=20
  > and an unsigned int holds +64, 664 (again not sure about last 3)=20
  >=20
  >=20
  >=20
  > >From: "Ioannis Vranos"=20
  > >To: "Dev-C++"=20
  > >Subject: RE: [Dev-C++] Unsigned and signed=20
  > >Date: Fri, 19 Oct 2001 17:54:32 +0200=20
  > >=20
  > >signed integer variables can store both positive and negative =
variables,=20
  > >unsigned only positive.=20
  > >=20
  > >e.g.=20
  > >int x;=20
  > >signed int x; // They are both the same=20
  > >=20
  > >unsigned int x;=20
  > >=20
  > >long y;=20
  > >signed long y; // They are both the same=20
  > >=20
  > >unsigned long y;=20
  > >=20
  > >=20
  > >In the case of int the "int" can be avoided:=20
  > >=20
  > >int x;=20
  > >signed x; // They are both the same=20
  > >=20
  > >unsigned x;=20
  > >=20
  > >=20
  > >Also normally we do not use signed but only unsigned when we need =
so:=20
  > >=20
  > >int x; // signed=20
  > >long y; //signed=20
  > >=20
  > >unsigned z; // unsigned int=20
  > >unsigned long y;=20
  > >unsigned char c;=20
  > >=20
  > >But a char it can be signed or unsigned. It depends from the =
system.=20
  > >=20
  > >E.g. char c; // it can be signed or unsigned=20
  > >=20
  > >signed char c; // signed=20
  > >unsigned char c; // unsigned=20
  > >=20
  > >=20
  > >Ioannis=20
  > >=20
  > >* Ioannis Vranos=20
  > >* Programming pages: http://www.noicys.f2s.com=20
  > >* Alternative URL: http://run.to/noicys=20
  > >=20
  > >=20
  > >=20
  > >=20
  > > > -----Original Message-----=20
  > > > From: dev...@li...=20
  > > > [mailto:dev...@li...] On Behalf=20
  > > > Of mi...@ju...=20
  > > > Sent: Friday, October 19, 2001 1:36 PM=20
  > > > To: dev...@li...=20
  > > > Subject: [Dev-C++] Unsigned and signed=20
  > > >=20
  > > >=20
  > > > What do unsigned and signed do to variables?=20
  > > > ________________________________________________________________ =

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