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Michael J. Reeves, AA, AS
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 Posted: Sat Sep 25, 2004 6:01 pm Post subject: Compiler Compatabilities |
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I received the below response to a problem I was experiencing
using Borland C++ Builder 5.
I was wondering if this is an ongoing problem with different
publishers of alleged ISO standard compiler systems, OR is this an issue
of differences in meeting the standards???
See below for background on my question.
THANKS.
MJR
Michael J. Reeves, AA, ASc
E-Mail: [email]michaeljreeves (AT) sbcglobal (DOT) net[/email]
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On 24 Sep 2004 07:31:48 -0400, [email]kanze (AT) gabi-soft (DOT) fr[/email] wrote:
| Quote: | "Michael J. Reeves, AA, ASc" <michaeljreeves (AT) sbcglobal (DOT) net> wrote in
message news:<2pc1l0dr2vho6qvuuk7pi2k5p80lbibff8 (AT) 4ax (DOT) com>...
On 8 Sep 2004 17:52:02 -0400, [email]smith4894 (AT) excite (DOT) com[/email] (gorda) wrote:
Create a one dimensional array of pointers (with the length
equivilant to the number of rows you need) and make EACH pointer a
dynamically allocated one dimentional array (with the length
equivilant to the number of columns you need).
//Dynamically create a 3 by 4 array:
int rows=3, cols=4, int **x;
//create one dimensional array of pointers
x = new int*[rows];
//initialize each pointer to be another one dimentional array
for(int i = 0; i < rows; ++i)
{
x[i] = new int[cols];
}
//Can use x just like a normal array now.
x[2][2] = 4;
cout << x[2][2];
The above will not compile and run.
Where's the problem? It works with my compilers.
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THAT's what I needed to know.
I am using Borland C++ Builder 5, and I find that some examples
in the texts I am using do NOT compile.
The one above submitted by a reader mimics an example from my
text, and neither will compile under this system.
I should probably start a new thread to deal with this question
of compatability among compilers.
Again, THANKS.
MJR
Michael J. Reeves, AA, ASc
E-Mail: [email]michaeljreeves (AT) sbcglobal (DOT) net[/email]
---------------------------------------------------------
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I take no SPAM from anyone. I am NOT in the SPAM business!!!
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Bronek Kozicki
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| Posted: Mon Sep 27, 2004 10:29 am Post subject: Re: Compiler Compatabilities |
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Michael J. Reeves, AA, ASc wrote:
| Quote: | I received the below response to a problem I was experiencing
using Borland C++ Builder 5.
|
It would be far easier to give you correct response, if you supply error
message from your compiler. However, code posted below has one small
problem.
| Quote: | I was wondering if this is an ongoing problem with different
publishers of alleged ISO standard compiler systems, OR is this an issue
of differences in meeting the standards???
|
As far as I know there are no 100% compliant compilers. Comeau
(www.comeaucomputing.com ) is closest you can get, and after it number
of recently released compilers (GCC 3.4.2, Visual C++ .NET 2003, Intel
8.0 etc.) - however none of them is fully conforming to C++ standard.
Compilers few years old (like GCC 2.95, Visual C++ 6.0 and Borland C++ )
are generally much less conforming than newer ones; some libraries (like
Boost.Spirit http://www.boost.org/libs/spirit ) won't work with such old
and non-conformiong compilers.
B.
PS. Here's error in code that you posted:
| Quote: | int rows=3, cols=4, int **x;
|
above should read:
int rows=3, cols=4, **x;
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Retlak
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| Posted: Mon Sep 27, 2004 9:10 pm Post subject: Re: Compiler Compatabilities |
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"Michael J. Reeves, AA, ASc" <michaeljreeves (AT) sbcglobal (DOT) net> wrote
| Quote: | I received the below response to a problem I was experiencing
using Borland C++ Builder 5.
[snip] |
| Quote: | int rows=3, cols=4, int **x;
|
This isn't a question of compatibility. A compiler which accepts the
above line has a BUG. It is not valid C++. File a bug report with the
publisher of the compiler.
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Alberto Barbati
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| Posted: Mon Sep 27, 2004 9:16 pm Post subject: Re: Compiler Compatabilities |
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Michael J. Reeves, AA, ASc wrote:
| Quote: | //Dynamically create a 3 by 4 array:
int rows=3, cols=4, int **x;
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This should give you a syntax error. It should be
int rows=3, cols=4; int** x;
^
semicolon here
| Quote: |
The above will not compile and run.
Where's the problem? It works with my compilers.
|
Usually it's MUCH better if you provide the exact error messages you're
getting. The sentence "will not compile" is not at all helpful...
Alberto
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