#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