Article View: csu.cs.200
Article #372Re: Basic C++ question
From: Corby S. Hudnall
Date: Wed, 04 Feb 1998 00:00
Date: Wed, 04 Feb 1998 00:00
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2302 bytes
You are mostly correct but there is one notable mistake with your
response. 'void' functions can have an empty return statement in them
and will NOT produce a syntax error. This is so that the control flow
of a function can be governed. Consider, for example, a function that
swaps the values of two pointers (not unlike what SelSort does for the
current assignment):
void swap( Node* src1, Node* src2 )
{
if( src1 == src2 )
return; // <-- if the nodes are the same, I don't want
// to do anything, and just return.
etc....
}
As for placing prototypes in functions, that too is just fine and is in
fact preferable to placing prototypes in global space whenever
possible. I didn't mention that because in truth, we'll be using c++
classes for later assignments, at which time the notion of a free
function (one outside of a class) becomes largely unused.
michael maitan wrote:
>
> I wanted to point out that function prototypes can be placed in functions
> as well. This is useful if you do not want them to be global. In some of the
> programs in CS151 we were actually required to place the prototypes in
> the main() function. I also noticed there were ruturn statements in the
> functions used. Since the functions were defined with void before the
> function name, the function is not expected to return anything through its
> name. This will cause a syntax error when compiled. (Ex. void function()
> returns nothing through its name... int function2() returns an int through
> its name) I hope this is of help to any who read this. : )
>
> -Mike
> (http://holly.colostate.edu/~brnruber)
cheers
--
Corby S. Hudnall
http://www.cs.colostate.edu/~hudnall/cs200
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 127144,f08d1a1544bcc5dc X-Google-Attributes: gid127144,public From: "Corby S. Hudnall" <hudnall@cs.colostate.edu> Subject: Re: Basic C++ question Date: 1998/02/04 Message-ID: <34D8A66A.EC5AFDBC@cs.colostate.edu> X-Deja-AN: 322047484 Content-Transfer-Encoding: 7bit References: <6b92v9$2pvs@yuma.ACNS.ColoState.EDU> Mime-Version: 1.0 To: michael maitan <maitan@cs.colostate.edu> Content-Type: text/plain; charset=us-ascii Organization: Colorado State University Newsgroups: csu.cs.200