STRSTR - obtain first substring of string.
(ANSI Standard) 
Usage:
#include <string.h>
ptr = strstr( s, subs );
Where:
    - const char *s; 
- points to the string to be scanned. 
- const char *subs; 
- points to the (sub)string to scan for. 
- char *ptr; 
- points to the first occurrence of the substring in the
        given string. If the substring is not found, this will be
        a null pointer. 
Description:
"strstr" returns a pointer to the first occurrence
of a substring within another string. 
See Also:
expl c lib strrstr
Copyright © 1996, Thinkage Ltd.