the different between function and procedure for C/C++ and Pascal

[digital]

hello anyone...

pls explain me , how different between function and procedure for C/C++ and Pascal.

Thankx......

[Joona I Palaste]

digital <di*******@fromru.com> scribbled the following:

hello anyone...

pls explain me , how different between function and procedure for C/C++ and Pascal.

For C and C++:
There is no such thing as "procedure".
For Pascal:
Ask at comp.lang.pascal.

--
/-- Joona Palaste (pa*****@cc.helsinki.fi) ------------- Finland --------\
\-- http://www.helsinki.fi/~palaste --------------------- rules! --------/
"Ice cream sales somehow cause drownings: both happen in summer."
- Antti Voipio & Arto Wikla

[lallous]

"digital" <di*******@fromru.com> wrote in message
news:9c******************************@localhost.ta lkaboutprogramming.com...

hello anyone...

pls explain me , how different between function and procedure for C/C++ and Pascal.
Thankx......

Hello,

In pascal, the difference between procedure and function is that:
procedure does not have a return value and function have a return value.
So there is no real difference, and all pascal procedures can be written as
functions, and you disregard the return type/value.

In C, all routines, procedures, functions are named a 'function'.

To map from C function to pascal procedure:
procedure myproc(x: integer); { pascal code }
void myproc(int x); /* C code */

The 'void' as a return type is used to denote that function has no return
type.

--
Elias

[Martin Ambuhl]

digital wrote:

hello anyone...

pls explain me , how different between function and procedure for C/C++ and Pascal.

There is no such thing as C/C++, and C has only functions.
Pascal conventionally calls functions that do not return values (that is,
that are executed solely for their side-effects) 'procedures.' In C, they
are just functions with a return type of void.

--
Martin Ambuhl

[Fred Bloggs]

"digital" <di*******@fromru.com> wrote in message news:<9c******************************@localhost.t alkaboutprogramming.com>...

hello anyone...

pls explain me , how different between function and procedure for C/C++ and Pascal.

The difference is that c++ and pascal are offtopic here, and C doesn't
have procedures.

[Christopher Benson-Manica]

lallous <la*****@lgwm.org> spoke thus:

The 'void' as a return type is used to denote that function has no return
type.

FMI, is this statement identical to "... function does not return
anything?"

--
Christopher Benson-Manica | I *should* know what I'm talking about - if I
ataru(at)cyberspace.org | don't, I need to know. Flames welcome.

[August Derleth]

Christopher Benson-Manica wrote:

lallous <la*****@lgwm.org> spoke thus:

The 'void' as a return type is used to denote that function has no return
type.

FMI, is this statement identical to "... function does not return
anything?"

It's a clumsy and possibly pedantically incorrect way of saying it, but
I think that's what lallous means.

(Perhaps lallous could have said `does not return an object of a usable
type', since trying to inspect or modify an object of void type is not
allowed in C. But that's, again, rather clumsy compared with `does not
return any value.', and could be technically incorrect.)

--
My address is yvoregnevna gjragl-guerr gjb-gubhfnaq guerr ng lnubb qbg pbz
Note: Rot13 and convert spelled-out numbers to numerical equivalents.

[August Derleth]

Fred Bloggs wrote:

"digital" <di*******@fromru.com> wrote in message news:<9c******************************@localhost.t alkaboutprogramming.com>...

hello anyone...

pls explain me , how different between function and procedure for C/C++ and Pascal.

The difference is that c++ and pascal are offtopic here, and C doesn't
have procedures.

C++ and Pascal are offtopic, but discussing the differences between them
and C isn't verboten as long as everyone knows that comp.lang.c isn't
guaranteed to know anything about anything other than standard C. (And
even /that/ isn't Guaranteed, but we do try. :) )

Anyway, in Pascal a procedure is a function that does not return a value.

In C, nothing is called a procedure but functions are allowed to not
return anything. This is indicated by giving the function a return type
of void.

C++ is largely similar to C in this respect.

--
My address is yvoregnevna gjragl-guerr gjb-gubhfnaq guerr ng lnubb qbg pbz
Note: Rot13 and convert spelled-out numbers to numerical equivalents.

[pete]

August Derleth wrote:

Christopher Benson-Manica wrote:

lallous <la*****@lgwm.org> spoke thus:

The 'void' as a return type is used to denote that
function has no return type.

FMI, is this statement identical to "... function does not return
anything?"

It's a clumsy and possibly pedantically incorrect
way of saying it,

I think that's a good way of saying it.
but I think that's what lallous means.

(Perhaps lallous could have said `does not return an object of a
usable type',
since trying to inspect or modify an object of void type is not
allowed in C. But that's, again, rather clumsy compared with `does not
return any value.', and could be technically incorrect.)

I think that's worse.
The return value of a function is an rvalue, not an object.

--
pete

[pete]

pete wrote:

August Derleth wrote:

Christopher Benson-Manica wrote:

lallous <la*****@lgwm.org> spoke thus:
>The 'void' as a return type is used to denote that
>function has no return type.
FMI, is this statement identical to "... function does not return
anything?"

It's a clumsy and possibly pedantically incorrect
way of saying it,

I think that's a good way of saying it.

Refering to "... function does not return anything"

but I think that's what lallous means.

(Perhaps lallous could have said `does not return an object of a
usable type',
since trying to inspect or modify an object of void type is not
allowed in C. But that's, again, rather clumsy compared with `does not
return any value.', and could be technically incorrect.)

I think that's worse.
The return value of a function is an rvalue, not an object.

--
pete

--
pete

[Derk Gwen]

"digital" <di*******@fromru.com> wrote:
# hello anyone...
#
# pls explain me , how different between function and procedure for C/C++ and Pascal.

A procedure is void function. A function is nonvoid function.
Instead of assigning to the function name, assign to a local variable with
the same type, say result, and add a return of that at the and

procedure P; begin void P() {
... ...
end }

function F: T; begin T F() {T result;
... ...
F := x; result := X;
... ...
end; return result;}

--
Derk Gwen http://derkgwen.250free.com/html/index.html
She broke your heart and inadvertendently drove men to deviant lifestyles.

[lallous]

pete <pf*****@mindspring.com> wrote in message news:<40**********@mindspring.com>...

pete wrote:

August Derleth wrote:

Christopher Benson-Manica wrote:
> lallous <la*****@lgwm.org> spoke thus:
>
>
>>The 'void' as a return type is used to denote that
>>function has no return type.
>
>
> FMI, is this statement identical to "... function does not return
> anything?"
>

It's a clumsy and possibly pedantically incorrect
way of saying it,

I think that's a good way of saying it.

Refering to "... function does not return anything"

but I think that's what lallous means.

(Perhaps lallous could have said `does not return an object of a
usable type',
since trying to inspect or modify an object of void type is not
allowed in C. But that's, again, rather clumsy compared with `does not
return any value.', and could be technically incorrect.)

I think that's worse.
The return value of a function is an rvalue, not an object.

--
pete
Hello,

>>The 'void' as a return type is used to denote that
>>function has no return type.
>
>
> FMI, is this statement identical to "... function does not return
> anything?"
>

It's a clumsy and possibly pedantically incorrect
way of saying it,

I would be glad to learn how to say it correctly in technical terms.

Or simply, if said again (drawing from previous posts): "It does not
return a usable value" ?

--
Elias

[pete]

lallous wrote:

pete <pf*****@mindspring.com> wrote in message news:<40**********@mindspring.com>...

pete wrote:

August Derleth wrote:
>
> Christopher Benson-Manica wrote:
> > lallous <la*****@lgwm.org> spoke thus:
> >
> >
> >>The 'void' as a return type is used to denote that
> >>function has no return type.
> >
> >
> > FMI, is this statement identical to "... function does not return
> > anything?"
> >
>
> It's a clumsy and possibly pedantically incorrect
> way of saying it,

I think that's a good way of saying it.

Refering to "... function does not return anything"

> but I think that's what lallous means.
>
> (Perhaps lallous could have said `does not return an object of a
> usable type',
> since trying to inspect or modify an object of void type is not
> allowed in C. But that's, again, rather clumsy compared with `does not
> return any value.', and could be technically incorrect.)

I think that's worse.
The return value of a function is an rvalue, not an object.

--
pete
Hello,
>>The 'void' as a return type is used to denote that
> >>function has no return type.
> >
> >
> > FMI, is this statement identical to "... function does not return
> > anything?"
> >
>
> It's a clumsy and possibly pedantically incorrect
> way of saying it,

I would be glad to learn how to say it correctly in technical terms.

Or simply, if said again (drawing from previous posts): "It does not
return a usable value" ?

The first way to say it that pops into my head is
"it doesn't return anything."
"It does not return a usable value", would be a subset
of that statement. Returning a value, is done by writing
the return value to someplace that the calling function
will have access to read.
A function with a void return type, doesn't have to do that.

--
pete

[E. Robert Tisdale]

digital wrote:

What is the difference between function and procedure for C/C++ and Pascal.

Procedures are only possible in *imperative* computer programming
languages like Fortran, Pascal, C, C++, etc.
The *thread* of execution normally *proceeds* from one imperative
(executable statement) to the next. Flow control "structures"
such as conditionals, loops, switch, case, etc.
may change the normal sequence of execution.
Within the context of each imperative computer programming language,
procedures which return a value are called functions:

language returns value no return value
-----------------------------------------------
C/C++ function void function
Fortran function subroutine
Pascal function procedure

Note that functions need not be procedures:

int min(int i, int j) {
return (i < j)? i: j;
}

and simply return the value of an expression.
It is possible to write useful C programs
without any imperatives at all -- no procedures!
An *applicative* of "functional" programming language
like lisp has no imperatives and, thus, *no* procedures.

[Fred Bloggs]

August Derleth <se*@sig.now> wrote in message news:<js*****************@fe02.usenetserver.com>.. .

C++ and Pascal are offtopic, but discussing the differences between them
and C isn't verboten

comp.lang.c is for the discussion of C as pertains to the relevant standards.