Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!uunet!contex!ed
From: ed@contex.UUCP (Edward Bagdonas)
Newsgroups: comp.lang.c++
Subject: Relationship of C++ to C
Message-ID: <491@contex.UUCP>
Date: 4 Dec 89 16:08:12 GMT
Organization: Xyvision Design Systems, Wakefield MA
Lines: 23


In converting several old C programs to C++, I came across two 
types of behavior from cfont (ATT 1.2) that I found perplexing.
Consider these in regard to the relationship between C and C++.

    1) Const expressions may not contain floats or
	expressions that evaluate to floats.  
	 
	#define MACRO1 (i) ((int)(this * i) / that)
	int array[ MACRO1( 1000 ) ];

	I do see the merit of such restrictions. 
	Does this behavior provide an exception to the statement that
	"C++ is that it is a superset of C"?

    2) Cfront has imposed an internal limit of several thousand,
	elments per aggregate initialization.  

	float table[ 6000 ] = { 0.0001, 0.0002, 0.0003, ... };

	Is there a particular need or reason for this limit?

							E. Bagdonas