Subj : Re: subset function for string in c++
To   : comp.programming
From : Randy Howard
Date : Wed Sep 28 2005 10:42 pm

August Karlstrom wrote
(in article <eLC_e.34873$d5.190040@newsb.telia.net>):

> puzzlecracker wrote:
>> basically, I need to find out wether charecters in string a are subset
>> of string b.. 
>> 
>> 
>> example 
>> 
>> 
>> a: rx   b:rwx 
>> that shall return true.
>> 
> 
> As this group is language independent i chose to write an implementation 
> in Oberon:
> 
>     PROCEDURE Subset(a, b: ARRAY OF CHAR): BOOLEAN;
>        VAR j, k: LONGINT;
>     BEGIN
>        j := 0;
>        WHILE a[j] # 0X DO
>           k := 0;
>           WHILE (b[k] # 0X) & (b[k] # a[j]) DO INC(k) END;
>           IF b[k] = 0X THEN RETURN FALSE END;
>           INC(j)
>        END;
>        RETURN TRUE
>     END Subset;
> 
> 

Wow.  Ben's version sure seems a lot clearer.  :-)

I'm having pascal flashbacks, make it stop.

-- 
Randy Howard (2reply remove FOOBAR)

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