Example

       /* This program verifies that two transformed strings when      */
       /* passed through strxfrm and then compared, provide the same   */
       /* result as if passed through strcoll without any              */
       /* transformation.

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

       #define  BUFF_SIZE  256

       main()
       {
          char string1[BUFF_SIZE];
          char string2[BUFF_SIZE];
          int errno;
          int coll_result;
          int strcmp_result;
          size_t strxfrm_result1;
          size_t strxfrm_result2;

          /* setlocale to French locale */

          if (setlocale(LC_ALL, "fr_FR.ISO8859-1") == NULL) {
              perror("setlocale");