Re: split a string

From: Francis Glassborow (francis_at_robinton.demon.co.uk)
Date: 06/14/04 

Date: Mon, 14 Jun 2004 11:28:24 +0100

In article <b02d7807.0406140134.7906d43e@posting.google.com>, Ronen Kfir
<ronenk@tauex.tau.ac.il> writes
>Hi,
>
>I have a string of N characters. Inside this string planted one or
>more ‘*' characters, which are the delimiter for the substring.
>
>Example:
>
>dfka*kghe*c***mbmfkj
>
>I need to find the length of each substring. I have figured that in
>order to count the substrings I need to replace '*' with \0. How do I
>do that replacement? If I do that, how will the substrings will be
>allocated? How will I access them?
>Need to acomplish task without using slice() or any library function
>of family.

Then I think you have figured out wrong. Do not even dream of messing
with the characters. You should be able to achieve your objective with a
const qualified string (though I wish you had followed instructions and
told us whether you were writing C or C++ because the exact idiomatic
mechanisms are different in the two languages.

A very unpolished (i.e. I would give it a barely passing grade as a
teacher) solution in C is:

size_t mystrlen(char const ** source_ptr){
   int count = 0;
   char const * source = *source_ptr;
   for(count; source[count]; ++count){
     ++(*source_ptr);
     if(source[count] == '*') break;
   }
   return count;
} 

-- 
Francis Glassborow      ACCU
Author of 'You Can Do It!' see http://www.spellen.org/youcandoit
For project ideas and contributions: http://www.spellen.org/youcandoit/projects

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