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strstr()                 Find Substring

 #include   <string.h>                   Required for declarations only

 char       *strstr(string1,string2);
 char       *string1;                    String to search
 char       *string2;                    Substring to search for


    strstr() returns a pointer to the first occurrence of 'string2' in
    'string1'.

    Returns:    A pointer to the first occurrence of 'string2' in
                'string1'. NULL is returned if 'string2' is not found.

  -------------------------------- Example ---------------------------------

    The following statements search for 'str2' in 'str1'.

         #include <string.h>
         #include <stdio.h>

         char *str1 = "An ounce of prevention";
         char *str2 = "ounce";
         char *substr;

         main()
         {
             substr = strstr(str1,str2);
             if (substr != NULL)
                 printf("%s",substr);
         }