AVR-Chat

--- Jim Wagner <jim_d_wagner@applelinks.net> wrote:

> Have you checked the exection of the "for" loop in
> the
> debugger?
> 
> Jim
> 
> 
> On 12 Mar 2007 22:10:47 -0700,Tue, 13 Mar 2007
> 05:10:11
> -0000
>  "magzky02" <magzky02@yahoo.com> wrote:
> > i would like to get the sum of values of
> characters in a
> > string. I 
> > use to get the checksum.
> > 
> > ex.
> > strcopy(string1, "abcdefghigklmnopqrstuvwxyz");
> > 
> > this does not work:
> > 
> > sum=0;
> > for (i = 0; i < strlen(string1); i++)
> > {
> > sum = sum + string[i];
> > }
> > 
> > but this works:
> > 
> > sum = string1[0] + string1[1] + .... + string[25];
> > 
> > but is too lengthy to do the later method.
> > is there any shorter method to get the sum of
> values in a
> > string? 
> > 
> > regards
> > 
> > mago
> > 
> 

ofcourse it's better to use end of string character,
instead of using strlen for each iteration:

sum = 0;
char c;

for(i=0; (c=s[i]) != '\0'; i++)
   sum += c;




 
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