Example

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

       /* The following test program will set up the British English   */
       /* locale, and then extract the International Currency symbol   */
       /* and the International Fractional Digits fields for this      */
       /* locale and print them.                                       */

       int main()
       {
           /* Declare variables                                        */

           char *return_val;
           struct lconv *lconv_ptr;

           /* Load a locale                                            */

           return_val = (char *) setlocale(LC_ALL, "en_GB.iso8859-1");

           /* Did the locale load successfully?                        */

           if (return_val == NULL) {

               /* It failed to load the locale                         */
              printf("ERROR : The locale is unknown");
               exit(EXIT_FAILURE);
           }

           /*  Get the lconv structure from the locale                 */

           lconv_ptr = (struct lconv *) localeconv();

           /* Compare the international currency symbol string with an */
           /* empty string. If they are equal, then the international  */
           /* currency symbol is not defined in the locale.            */

           if (strcmp(lconv_ptr->int_curr_symbol, "")) {
               printf("International Currency Symbol = %s\n",
                      lconv_ptr->int_curr_symbol);
           }
           else {
               printf("International Currency Symbol =");
               printf("[Not available in this locale]\n");
           }

           /* Compare International Fractional Digits with CHAR_MAX.   */
           /* If they are equal, then International Fractional Digits  */
           /* are not defined in this locale.                          */

           if ((unsigned char) (lconv_ptr->int_frac_digits) != CHAR_MAX) {
               printf("International Fractional Digits = %d\n",
                      lconv_ptr->int_frac_digits);
           }
           else {
               printf("International Fractional Digits =");
               printf("[Not available in this locale]\n");
           }
       }

     Running the example program produces the following result:

       International Currency Symbol = GBP
       International Fractional Digits = 2