dev-cpp-users

[Dev-C++] Mistake ?

[Adam M. <up...@in...>]

Hi all.

One day i made a little mistake. Instead of "char* Name =3D new =
char[FilenameLength];"
i wrote " char Name[FilenameLength];",  where FilenameLength is =
evaluated by runing
program. I didn't notice that and everythig worked properly. Yesterday i =
compiled the project
under VisualC++ 6.0 and ofcourse compiler said it is an error. Ofcourse =
it is error because
compiler needs constant value for table size. Can someone tell me why =
mingw didn't report
any error and what is more interesting: why my program worked properly?

regards.
Adam.

Re: [Dev-C++] Mistake ?

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

It is a system extension (variable sized arrays). =0D
 =0D
=0D
=0D
Ioannis Vranos=0D
 =0D
* Programming pages: http://www.noicys.freeurl.com=0D
* Alternative URL: http://run.to/noicys =0D
 =0D
 =0D
-------Original Message-------=0D
 =0D
From: Adam Malinowski=0D
Date: =D0=DD=EC=F0=F4=E7, 27 =D6=E5=E2=F1=EF=F5=DC=F1=E9=EF=F2 2003 5:01:=
10 =EC=EC=0D
To: dev...@li...=0D
Subject: [Dev-C++] Mistake ?=0D
 =0D
Hi all.=0D
 =0D
One day i made a little mistake. Instead of "char* Name =3D new
char[FilenameLength];"=0D
i wrote " char Name[FilenameLength];",  where FilenameLength is evaluated=
 by
runing=0D
program. I didn't notice that and everythig worked properly. Yesterday i
compiled the project=0D
under VisualC++ 6.0 and ofcourse compiler said it is an error. Ofcourse i=
t
is error because=0D
compiler needs constant value for table size. Can someone tell me why min=
gw
didn't report=0D
any error and what is more interesting: why my program worked properly?=0D
 =0D
regards.=0D
Adam.=0D
=20

Re: [Dev-C++] Mistake ?

[Adam M. <up...@in...>]

>>It is a system extension (variable sized arrays).

So whay does VC++ not compile it? Is it too old?





-------Original Message-------

From: Adam Malinowski
Date: ĐÝěđôç, 27 ÖĺâńďőÜńéďň 2003 5:01:10 ěě
To: dev...@li...
Subject: [Dev-C++] Mistake ?

Hi all.

One day i made a little mistake. Instead of "char* Name = new
char[FilenameLength];"
i wrote " char Name[FilenameLength];",  where FilenameLength is evaluated by
runing
program. I didn't notice that and everythig worked properly. Yesterday i
compiled the project
under VisualC++ 6.0 and ofcourse compiler said it is an error. Ofcourse it
is error because
compiler needs constant value for table size. Can someone tell me why mingw
didn't report
any error and what is more interesting: why my program worked properly?

regards.
Adam.



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Re: [Dev-C++] Mistake ?

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

-------Original Message-------=0D
 =0D
From: Adam Malinowski=0D
Date: =D0=DD=EC=F0=F4=E7, 27 =D6=E5=E2=F1=EF=F5=DC=F1=E9=EF=F2 2003 5:48:=
18 =EC=EC=0D
To: Ioannis Vranos; dev...@li...=0D
Subject: Re: [Dev-C++] Mistake ?=0D
 =0D
>>It is a system extension (variable sized arrays).=0D
 =0D
So whay does VC++ not compile it? Is it too old?=0D
 =0D
 =0D
 =0D
=3D=3D> It is a system extension of GCC. As with all system extensions th=
ey are
not guaranteed to compile to other systems or even different versions of =
the
same compiler. If you use C++, use vector instead. =0D
 =0D
=3D=3D> If you use C, C99 provides the notion of variable length arrays (=
VLAs)
so you can use that (but if i recall correctly VLAs are limited to the
automatic storage/stack, that is they do not use the free store).=0D
 =0D
=3D=3D> In C++ use the standard library containers instead of allocating =
and
deallocating memory manually.=0D
 =0D
 =0D
Ioannis Vranos=0D
 =0D
* Programming pages: http://www.noicys.freeurl.com=0D
* Alternative URL: http://run.to/noicys=20