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Problems with strtok()

 
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XorpiZ
Guest
Problems with strtok()
PostPosted: Sat Nov 26, 2005 8:19 am     Reply with quote
Hi, i'm having a few problems with strtok().

I've tried using the example given in the reference sheet.

My program looks like this (plus the defines, includes etc)

Code:

void main()
{
   char raw_nmea_data [65];
   char term;
   char *ptr;
   strcpy(raw_nmea_data, "$GPRMC,150022.721,V,0000.0000,N,00000.0000,E,0.00,0.00,251105,,*16");
   //strcpy(raw_nmea_data, "one, two, three");
   term = ',';

   ptr = strtok(raw_nmea_data, term);
   
   while(ptr != NULL)
    {
       puts(ptr);
      ptr = strtok(NULL, term);
   }
            
   while(1);
 
}


See, now the problem is. If i use "strcpy(raw_nmea_data, "$GPRMC,150022.721,V,0000.0000,N,00000.0000,E,0.00,0.00,251105,,*16");

the output on hyperterm looks like this
$GPRMC
7
V
N

And thats obviously wrong..

But if i use "strcpy(raw_nmea_data, "one, two, three"); it looks like this

one
two
three

Just like it's supposed to. Why doesn't the other one work?

Any hints, tips, pointers etc. very much appreciated Smile[/code]
Guest
PostPosted: Sat Nov 26, 2005 8:55 am     Reply with quote
Well I figured it out..

use strcpy(term, ","); instead of term = ',' and char term[2] instead of char term;
Ttelmah
Guest
PostPosted: Sat Nov 26, 2005 10:03 am     Reply with quote
It makes sense when you realise the a 'string' in C, is a sequence of characters, with a null terminator. Your previous declarations, declared a character, but not a 'string'. You can just declare:

char term[2] = ",";

Which will declare the string, and pre-initialise it with the required value,all in one go. :-)

Best Wishes
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