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From: paul@tredysvr.Tredydev.Unisys.COM (Paul Siu)
Newsgroups: comp.lang.c
Subject: When do you use const
Keywords: const, #define, C
Message-ID: <1220@tredysvr.Tredydev.Unisys.COM>
Date: 1 Feb 91 16:53:26 GMT
Organization: Unisys Corporation, Tredyffrin, PA
Lines: 10

In ANSI C, you can define a variable as constant by preceeding it with const.
You can for example define a double variable x that you cannot change by

     const double x;

However, what is the advantage of using const over #define?  Why was the
reason for its addition to ANSI C.

Paul Siu
paul@tredysvr.tredydev.unisys.com