[Info-vax] C limitations, was: Re: VMS process communication

[Bob Eager]

On Sun, 23 Apr 2023 09:46:32 -0400, bill wrote:

> On 4/22/2023 7:47 PM, Arne Vajhøj wrote:
>> 
>> 
>> True. In C the isdigit function would be much better than a range
>> check.
>> 
>> 
> A cute idea, but also a modern accretion. Early C didn't have it and as
> much as people like to say comparing a char to it's numeric value is not
> a good idea it was quite common at one time.  I know,
> because I was the one tasked with porting some of this code to Primix
> where the chars all had a different numeric value.  I don't know why
> they did it, but they did.

It's in the K&R book dated 1978. So that's 'modern', then?