Re: What attributes of a programming language simplify its implementation?

gah4 <gah4@u.washington.edu>
Sun, 2 Oct 2022 00:11:53 -0700 (PDT)

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From: gah4 <gah4@u.washington.edu>
Newsgroups: comp.compilers
Date: Sun, 2 Oct 2022 00:11:53 -0700 (PDT)
Organization: Compilers Central
References: 22-09-026 22-10-002 22-10-004
Injection-Info: gal.iecc.com; posting-host="news.iecc.com:2001:470:1f07:1126:0:676f:7373:6970"; logging-data="11572"; mail-complaints-to="abuse@iecc.com"
Keywords: PL/I, history
Posted-Date: 02 Oct 2022 15:36:25 EDT
In-Reply-To: 22-10-004

On Saturday, October 1, 2022 at 6:34:58 PM UTC-7, gah4 wrote:


(snip)


(our moderator wrote)


> [PL/I was a remarkably good language considering what a rush job it was but
> it has plenty of odd things, e.g.


> DCL (I, J, K) CHAR(3);
> I = 1;
> J = 2;
> K = I+J;


> What does K contain? Nope, it contains three spaces because the 1 and 2
> are converted to ' 1' and ' 2', they're converted back to integer,
> added, converted back to to a default size integer string
> like ' 3' and string assignment truncates from the right. -John]


Yes.


In the DO loop example, the first try was with K='100';
but the second had three blanks before the 100. That way the
string comparison works.


And the SQRT is done in double precision.

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