Fw: [Dev-C++] help files and Operator Precedence

[Eric <eri...@cl...>]

O bye the way ......

the fact that someone wrote
x = ((((mm-1)*31)+dd)-1)%8;
y = ((((mm-1)*31)+dd)-1)/8;

is a clear indication that people that do "programming micro-controller with C" more than I do and I was
able to pick up the correction show that not everyone is up to speed with operator precedence.


A very good reason why this should included in upgrade version of [Dev-C++]  help notes after all
Borlands have done it and they are not a "fly by night - half measure company"


From Eric



----- Original Message -----
From: "Eric" <eri...@cl...>
To: <dev...@li...>
Sent: Sunday, December 12, 2004 3:48 AM
Subject: Re: [Dev-C++] help files and Operator Precedence


OK

It is just that I don't do C++ full time nor do I programming micro-controller with C full time, A
employment option in ether direction would be great !!! :)

This is why I have kept the C++ notes in folder and refer to them and upgrade them from time to time as
needed,

The only reason why I made a posting is so I could find (and others as well) the operator precedence
order in the help file if I need to and don't have access to my notes, I am sure you Per Westermark would
not need them but other people might find it useful and stop them posting to this group on a trivial
problem using operator precedence.

After all I did see a "Hello world" example in the help files briefly while looking for something else.

Also I do realize that operator precedence (and did while I was at school) that the operator precedence
does not change between local and global variables, it was (it the time) a reminder that in a function a
global variable would be ignored if there was a local variable defined in that function.

From Eric








----- Original Message -----
From: "Per Westermark" <pw...@ia...>
To: "Eric" <eri...@cl...>
Cc: <dev...@li...>
Sent: Sunday, December 12, 2004 3:27 AM
Subject: Re: [Dev-C++] help files and Operator Precedence


Knowing thee precendence rules are part of basic programming skills.

Anyway, there are _no_ precedence difference between auto and global
variables when evaluating an expression.

There is, of course, a difference in the time when the
constructors/destructors will be run for variables declared global, auto
or dyanmically allocated.

/Wer W

On Sun, 12 Dec 2004, Eric wrote:

> Hi I belong to a micro-controller group,
>
>
> someone in the group presented a formula (which might not be the problem to their question)
> x = ((((mm-1)*31)+dd)-1)%8;
> y = ((((mm-1)*31)+dd)-1)/8;
>
>
> I told them it could be written as
> x = ((mm-1)*31+dd-1)%8;
> y = ((mm-1)*31+dd-1)/8;
>
>
> if they look on the "Operator Precedence chart"
>
> it took me a while to remember I had printed off the Operator Precedence chart from the Borland help
> files, for my own C++ notes (while I was at C++, school)
>
> While you can find the Operator Precedence chart on Internet with the help of Google, a couple of web
> sites I have seen does not tell that most Operator Precedence level (16 in all) go from left to right,
> but there are three that go from right to left, level 2, 13  and 15.
>
>
> Hand written on the bottom of the page is a reminder local variables take precedence over global
> variables (I was at school at the time when I wrote the notes, OK)
>
>
>
> The Aim of this posting is a suggestion this could included in the (dev-C++) help files on future
> upgrades unless I am using a old version you can correct me and I would be grateful.
>
>
> >From Eric Richards
>
>
>
>
>
>
>
>
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