# C 庫函數 - localeconv() ## 描述 C 庫函數 **struct lconv *localeconv(void)** 設置或讀取地域化信息。它會返回一個 **lconv** 結構類型的對象。 ## 聲明 下面是 localeconv() 函數的聲明。 ``` struct lconv *localeconv(void) ``` ## 參數 * **NA** ## 返回值 該函數返回一個指向當前區域 **struct lconv** 的指針，它的結構如下： ``` typedef struct { char *decimal_point; char *thousands_sep; char *grouping; char *int_curr_symbol; char *currency_symbol; char *mon_decimal_point; char *mon_thousands_sep; char *mon_grouping; char *positive_sign; char *negative_sign; char int_frac_digits; char frac_digits; char p_cs_precedes; char p_sep_by_space; char n_cs_precedes; char n_sep_by_space; char p_sign_posn; char n_sign_posn; } lconv ``` ## 實例 下面的實例演示了 localeconv() 函數的用法。 ``` #include <locale.h> #include <stdio.h> int main () { struct lconv * lc; setlocale(LC_MONETARY, "it_IT"); lc = localeconv(); printf("Local Currency Symbol: %s\n",lc->currency_symbol); printf("International Currency Symbol: %s\n",lc->int_curr_symbol); setlocale(LC_MONETARY, "en_US"); lc = localeconv(); printf("Local Currency Symbol: %s\n",lc->currency_symbol); printf("International Currency Symbol: %s\n",lc->int_curr_symbol); setlocale(LC_MONETARY, "en_GB"); lc = localeconv(); printf ("Local Currency Symbol: %s\n",lc->currency_symbol); printf ("International Currency Symbol: %s\n",lc->int_curr_symbol); printf("Decimal Point = %s\n", lc->decimal_point); return 0; } ``` 讓我們編譯并運行上面的程序，這將產生以下結果： ``` Local Currency Symbol: EUR International Currency Symbol: EUR Local Currency Symbol: $ International Currency Symbol: USD Local Currency Symbol: ￡ International Currency Symbol: GBP Decimal Point = . ```