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strtok
======

Syntax
------

     #include <string.h>
     
     char *strtok(char *s1, const char *s2);

Description
-----------

This function retrieves tokens from S1 which are delimited by
characters from S2.

To initiate the search, pass the string to be searched as S1.  For the
remaining tokens, pass `NULL' instead.

Return Value
------------

A pointer to the token, or `NULL' if no more are found.

Example
-------

     main()
     {
       char *buf = "Hello there, stranger";
       char *tok;
       for (tok = strtok(buf, " ,");
            tok;
            tok=strtok(0, " ,"))
         printf("tok = `%s'\n", tok);
     }
     
     tok = `Hello'
     tok = `there'
     tok = `stranger'