From: "Paul Lutus" <nospam AT nosite DOT com>
Newsgroups: alt.comp.lang.learn.c-c++,comp.lang.c++,comp.os.msdos.djgpp,comp.os.msdos.programmer
References: <7n6153$eqc$1 AT autumn DOT news DOT rcn DOT net>
Subject: Re: Help with Casts...
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Date: Wed, 21 Jul 1999 21:48:06 -0700
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

<< I'm am having trouble understanding casts.  >>

No, you aren't. You are having trouble understanding pointers.

<< Let's say I want to call a program >>

You mean call a function.

<< and it takes three variables.  >>

You mean three arguments.

<< Two of those variables are casts and are supposed to return values from
what I understand. >>

You mean two of the three arguments are pointers and can be modified within
the function.

<< How do I get those two values. >>

"Get?" Don't you mean "set?"

I hope this answer helps -- code almost always conveys more meaning in a
newsgroup than prose:

#include <stdio.h>

void modifyMyVals(int *a,int *b)
{
 *a = 3;
 *b = 4;
}

int main()
{
 int a = 1, b = 2;
 printf("Before: %d %d\n",a,b);
 modifyMyVals(&a,&b);
 printf("After: %d %d\n",a,b);
 return 0;
}

--

Paul Lutus
www.arachnoid.com

Tom wrote in message <7n6153$eqc$1 AT autumn DOT news DOT rcn DOT net>...
>I'm am having trouble understanding casts.  Let's say I want to call a
>program and it takes three variables.  Two of those variables are casts and
>are supposed to return values from what I understand.  How do I get those
>two values.
>
>Example;
>
>int playcdtrack(tracknumber, *startingposition, *endingposition)
>
>How do I get the variables startingposition and endingposition of let's say
>track #1?
>
>If anyone can help I would greatly appreciate.  Thanks.
>
>Tom
>
>