localeconv() 函数定义在 locale.h 头文件中。它有助于设置或读取当前程序的与位置相关的信息。这些信息以 lconv 结构体类型的对象返回，该对象表示当前 C 语言环境的数字和货币格式规则。
struct lconv *localeconv(void)
setlocale() 函数不接受任何参数。localeconv() 返回的对象不能被程序更改，因为它会被 setlocale() 函数覆盖。
它返回一个指向静态对象的指针，该对象包含当前 C 语言环境的格式规则，并具有以下结构。
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
| 输入 | 返回值 |
|---|---|
| 成功时 | 指向静态对象的指针 |
| 失败时 | 空指针 |
#include <stdio.h>
#include <locale.h>
int main () {
struct lconv * loc;
setlocale(LC_MONETARY, "it_IT");
loc = localeconv();
printf("Local Currency Symbol: %s\n",loc->currency_symbol);
printf("International Currency Symbol: %s\n",loc->int_curr_symbol);
setlocale(LC_MONETARY, "en_US");
loc = localeconv();
printf("Local Currency Symbol: %s\n",loc->currency_symbol);
printf("International Currency Symbol: %s\n",loc->int_curr_symbol);
setlocale(LC_MONETARY, "en_GB");
loc = localeconv();
printf ("Local Currency Symbol: %s\n",loc->currency_symbol);
printf ("International Currency Symbol: %s\n",loc->int_curr_symbol);
printf("Decimal Point = %s\n", loc->decimal_point);
return 0;
}
输出
Local Currency Symbol: EUR International Currency Symbol: EUR Local Currency Symbol: $ International Currency Symbol: USD Local Currency Symbol: £ International Currency Symbol: GBP Decimal Point = .
#include <stdio.h>
#include <locale.h>
int main(int argc, const char * argv[])
{
struct lconv *loc;
/* Set the locale to the environment default */
setlocale (LC_ALL, "");
/* Retrieve a pointer to the current locale */
loc = localeconv();
printf("Thousands Separator: %s\n", loc->thousands_sep);
printf("Currency Symbol: %s\n", loc->currency_symbol);
return 0;
}
输出
Thousands Separator: , Currency Symbol: $
