strchr()

[paperbox005]

using the strchr() is to see if a particular character is present in a string. Is it possible to find exactly where this character is in the string?

so say i have

char word[100];
word = "hello there re-tard"
strchr(word,'-');

is it possible to find at what location the '-' is without doing something like the following

for(i=0;i<strlen(word);i++)
{
    if(word[i] == '-')
        return i;
}

[Thantos]

sure is:

char word[] = "hello there re-tard"; /* Note the way you have it in your example
                 will not work */
char *ptr;
int index = -1;
ptr = strchr(word, '-');
if ( ptr != NULL )
  index = ptr - word;
else
  puts("Character not found");

[skorman00]

pointer math

char * p;
int index;
char word[10] = "hi-there!";

p = strchr(word, '-');
if(p)
    index = p - c;

edit:
Thantos beat me, no surprise

[paperbox005]

when you do that, does that return the first occrurence of "-" ?
hi-there re-tard
so the "-" will be at position 2 ?

[Emmanuel Delaha]

when you do that, does that return the first occrurence of "-" ?
hi-there re-tard
so the "-" will be at position 2 ?

What does your C-book or help file say about strchr() ?

Google 'man strchr()' gives:

The strchr() function returns a pointer to the first
occurrence of the character c in the string s.

We are not going to comment all the standard C-functions. You must have some reference documentation.

I recommend

http://www.dinkumware.com/refxc.html

[paperbox005]

ok well im trying to do this..
hi-there what-is-your-name
and using strchr to check if there is a "-" in the string.
so in this case it would point to the first "-" btw the "hi" and "there"
the next time i call strchr() how is it possible for me to make it point to the "-" that is btw the "what" and "is" ? if that is even possible?

[paperbox005]

Originally Posted by Google

The strchr() function returns a pointer to the first
occurrence of the character c in the string s.

i just found somewhere that says

The strchr() function returns a pointer to the LAST
occurrence of the character c in the string s.

[quzah]

You're thinking of strrchr.

Quzah.

[Emmanuel Delaha]

ok well im trying to do this..
hi-there what-is-your-name
and using strchr to check if there is a "-" in the string.
so in this case it would point to the first "-" btw the "hi" and "there"
the next time i call strchr() how is it possible for me to make it point to the "-" that is btw the "what" and "is" ? if that is even possible?

Of course. Just start from the last position + 1.

   char const s[] = hi-there what-is-your-name;

   char *p = strchr (s, '-');

   if (p != NULL)
   {
      /* first '-' found */

      strchr (p + 1, '-'); 

      /* etc. */
   }

I'm quite sure you are going to find how to write some smart auto adaptative loop...