dev-cpp-users

[Dev-C++] Differences in compilers

[Danny A. <tam...@ms...>]

Hey guys this is probably a really stupid question but I got a problem I =
feel is totally compiler related.  I'm still using a book called "C++ PRO=
GRAMMING for the Absolute Beginner," and its compatible with a compiler c=
alled "CODE WARRIOR". I have typed out a very simple code for Windows 32 =
apps and I have an error "NULL not declared," and  below is the code.  I =
was just wondering what I might have to adjust or keep in mind when deali=
ng with different compilers because the author figures this will run no p=
roblem. =20

#include <windows.h>
//win32 entry-point routine
int WINAPI WinMain(HINSTANCE hInst,
                   HINSTANCE hPreInst, =20
                   LPSTR lpszCmdLine, =20
                   int nCmdShow)
{
    MessageBox(Null, "Windows Programming is Easy!!",
                     "My First Message Box",
                     MB_OKCANCEL | MB_ICONINFORMATION);
}

Re: [Dev-C++] Differences in compilers

[Jason H. <jas...@bt...>]

Try writing NULL in all caps. AFAIK most definitions of NULL are done =
all in upper case letters. If I remember correctly NULL is normally =
defined thus:

#define NULL (void*) 0;

Although that could be wrong. In the end all NULL are effectivly zero in =
one form or another.

Jason.
  ----- Original Message -----=20
  From: Danny Austin=20
  To: dev...@li...=20
  Sent: Sunday, April 14, 2002 2:59 AM
  Subject: [Dev-C++] Differences in compilers


  Hey guys this is probably a really stupid question but I got a problem =
I feel is totally compiler related.  I'm still using a book called "C++ =
PROGRAMMING for the Absolute Beginner," and its compatible with a =
compiler called "CODE WARRIOR". I have typed out a very simple code for =
Windows 32 apps and I have an error "NULL not declared," and  below is =
the code.  I was just wondering what I might have to adjust or keep in =
mind when dealing with different compilers because the author figures =
this will run no problem.=20

  #include <windows.h>
  //win32 entry-point routine
  int WINAPI WinMain(HINSTANCE hInst,
                     HINSTANCE hPreInst,=20
                     LPSTR lpszCmdLine,=20
                     int nCmdShow)
  {
      MessageBox(Null, "Windows Programming is Easy!!",
                       "My First Message Box",
                       MB_OKCANCEL | MB_ICONINFORMATION);
  }

RE: [Dev-C++] Differences in compilers

[Ioannis V. <no...@ho...>]

-----Original Message-----
From: dev...@li...
[mailto:dev...@li...] On Behalf Of Jason
Hardman
Sent: Sunday, April 14, 2002 4:36 PM
To: Dev-C++; Danny Austin
Subject: Re: [Dev-C++] Differences in compilers



Try writing NULL in all caps. AFAIK most definitions of NULL are done
all in upper case letters. If I remember correctly NULL is normally
defined thus: 
 
 
NULL definition is always in capital letters.
 
#define NULL (void*) 0; 
 
 
It depends on the language. For C it is usually the above (without the
';'). For C++ the best definition of NULL is
 
#define NULL 0

 
 Ioannis

* Ioannis Vranos
* Programming pages:  <http://www.noicys.cjb.net/>
http://www.noicys.cjb.net
* Alternative URL:  <http://run.to/noicys> http://run.to/noicys

RE: [Dev-C++] Differences in compilers

[Ioannis V. <no...@ho...>]

-----Original Message-----
From: Ioannis Vranos [mailto:no...@ho...] 
Sent: Sunday, April 14, 2002 4:42 PM
To: Dev-C++
Subject: RE: [Dev-C++] Differences in compilers



-----Original Message-----
From: dev...@li...
[mailto:dev...@li...] On Behalf Of Jason
Hardman
Sent: Sunday, April 14, 2002 4:36 PM
To: Dev-C++; Danny Austin
Subject: Re: [Dev-C++] Differences in compilers



Try writing NULL in all caps. AFAIK most definitions of NULL are done
all in upper case letters. If I remember correctly NULL is normally
defined thus: 
 
 
NULL definition is always in capital letters.
 
#define NULL (void*) 0; 
 
 
It depends on the language. For C it is usually the above (without the
';'). For C++ the best definition of NULL is
 
#define NULL 0 
 

Or better: const int NULL=0;
 
 
 But the best in C++ is to use 0 directly.
 
Reference: Paragraph 5.1.1 on page 88 of "The C++ Prrogramming Language"
3rd Edition or Special Edition.
 
 
 
Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.cjb.net
<http://www.noicys.cjb.net/> 
* Alternative URL: http://run.to/noicys

RE: [Dev-C++] Differences in compilers

[Ioannis V. <no...@ho...>]

Sorry for the huge letters. ^%*&$# outlook.
 
 
 
Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.cjb.net
<http://www.noicys.cjb.net/> 
* Alternative URL: http://run.to/noicys
 
 
 -----Original Message-----
From: Ioannis Vranos [mailto:no...@ho...] 
Sent: Sunday, April 14, 2002 4:46 PM
To: Dev-C++
Subject: RE: [Dev-C++] Differences in compilers

 
 Or better: const int NULL=0;

 
 But the best in C++ is to use 0 directly.
 
Reference: Paragraph 5.1.1 on page 88 of "The C++ Prrogramming Language"
3rd Edition or Special Edition.

Re: [Dev-C++] Differences in compilers

[christiaan s. <ck...@ia...>]

try replacing Null with NULL. c++ is case sensitive
  ----- Original Message -----=20
  From: Danny Austin=20
  To: dev...@li...=20
  Sent: Sunday, April 14, 2002 3:59 AM
  Subject: [Dev-C++] Differences in compilers


  Hey guys this is probably a really stupid question but I got a problem =
I feel is totally compiler related.  I'm still using a book called "C++ =
PROGRAMMING for the Absolute Beginner," and its compatible with a =
compiler called "CODE WARRIOR". I have typed out a very simple code for =
Windows 32 apps and I have an error "NULL not declared," and  below is =
the code.  I was just wondering what I might have to adjust or keep in =
mind when dealing with different compilers because the author figures =
this will run no problem.=20

  #include <windows.h>
  //win32 entry-point routine
  int WINAPI WinMain(HINSTANCE hInst,
                     HINSTANCE hPreInst,=20
                     LPSTR lpszCmdLine,=20
                     int nCmdShow)
  {
      MessageBox(Null, "Windows Programming is Easy!!",
                       "My First Message Box",
                       MB_OKCANCEL | MB_ICONINFORMATION);
  }