C 库函数 - localeconv()

描述

C 库函数 struct lconv *localeconv(void) 设置或读取地域化信息。它会返回一个 lconv 结构类型的对象。

声明

下面是 localeconv() 函数的声明。

  1. struct lconv *localeconv(void)

参数

  • NA

返回值

该函数返回一个指向当前区域 struct lconv 的指针，它的结构如下：

  1. typedef struct {
  2.    char *decimal_point;
  3.    char *thousands_sep;
  4.    char *grouping;
  5.    char *int_curr_symbol;
  6.    char *currency_symbol;
  7.    char *mon_decimal_point;
  8.    char *mon_thousands_sep;
  9.    char *mon_grouping;
  10.    char *positive_sign;
  11.    char *negative_sign;
  12.    char int_frac_digits;
  13.    char frac_digits;
  14.    char p_cs_precedes;
  15.    char p_sep_by_space;
  16.    char n_cs_precedes;
  17.    char n_sep_by_space;
  18.    char p_sign_posn;
  19.    char n_sign_posn;
  20. } lconv

实例

下面的实例演示了 localeconv() 函数的用法。

  1. #include <locale.h>
  2. #include <stdio.h>
  4. int main ()
  5. {
  6.    struct lconv * lc;
  8.    setlocale(LC_MONETARY, "it_IT");
  9.    lc = localeconv();
  10.    printf("Local Currency Symbol: %s\n",lc->currency_symbol);
  11.    printf("International Currency Symbol: %s\n",lc->int_curr_symbol);
  13.    setlocale(LC_MONETARY, "en_US");
  14.    lc = localeconv();
  15.    printf("Local Currency Symbol: %s\n",lc->currency_symbol);
  16.    printf("International Currency Symbol: %s\n",lc->int_curr_symbol);
  18.    setlocale(LC_MONETARY, "en_GB");
  19.    lc = localeconv();
  20.    printf ("Local Currency Symbol: %s\n",lc->currency_symbol);
  21.    printf ("International Currency Symbol: %s\n",lc->int_curr_symbol);
  23.    printf("Decimal Point = %s\n", lc->decimal_point);
  25.    return 0;
  26. }

让我们编译并运行上面的程序，这将产生以下结果：

  1. Local Currency Symbol: EUR
  2. International Currency Symbol: EUR
  3. Local Currency Symbol: $
  4. International Currency Symbol: USD
  5. Local Currency Symbol: £
  6. International Currency Symbol: GBP
  7. Decimal Point = .