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Path: utzoo!watmath!watdaisy!ndiamond
From: ndiamond@watdaisy.UUCP (Norman Diamond)
Newsgroups: net.lang.c
Subject: Re: conversion of short to unsigned it
Message-ID: <7149@watdaisy.UUCP>
Date: Tue, 26-Mar-85 22:41:08 EST
Article-I.D.: watdaisy.7149
Posted: Tue Mar 26 22:41:08 1985
Date-Received: Wed, 27-Mar-85 05:11:29 EST
References: <2125@ncrcae.UUCP> <7088@watdaisy.UUCP> <2128@ncrcae.UUCP> <706@turtlevax.UUCP>
Organization: U of Waterloo, Ontario
Lines: 30

>  The "(unsigned int)" is a cast, saying that s is to be
> considered unsigned rather than signed.  It is NOT a conversion.  The
> fact that s was declared to be a "short int" is immaterial; it is of
> type int rather than float, etc.  This has the same effect as saying
> "(unsigned)", without the "int".  Int has no inherent size associated
> with it; the size of an int is machine-dependent.  If you want an int
> of a specific size, you say "short int" or "long int".
> -- Ken Turkowski @ CADLINC, Menlo Park, CA

A cast had better do conversion.  Can you imagine (float) 3 being some
epsilon-ish sort of value?

Can you imagine      char *c;
                     int  *x;

                     x = (int *) c;

not converting from (char *) to (int *) ?  (This is irrelevant on machines
that use char * for all pointers.  If a machine uses byte offsets for char *
... such as calloc still is supposed to return ... and the assignment doesn't
CONVERT the result of calloc to int * ... then we might as well give up with C.)
-- 

   Norman Diamond

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