<locale.h> - C语言标准库

locale.h头文件定义了特定的位置设置,如日期格式和货币符号。有一个重要的结构struct lconv和两个重要的函数,下面列出一些宏定义。

库宏

以下是在标头中定义的宏,这些宏将被用在下面列出的两个函数:

S.N. 宏及说明
1 LC_ALL
Set everything.
2 LC_COLLATE
Affects strcoll and strxfrm functions.
3 LC_CTYPE
Affects all character functions.
4 LC_MONETARY
Affects the monetary information provided by localeconv function.
5 LC_NUMERIC
Affects decimal-yiibai formatting and the information provided by localeconv function.
6 LC_TIME
Affects the strftime function.

库函数

以下是头locale.h中定义的函数:

S.N. 功能及说明
1 char *setlocale(int category, const char *locale)
设置或读取位置相关的信息。
2 struct lconv *localeconv(void)
设置或读取位置相关的信息。

库结构

typedef struct { char *decimal_yiibai; char *thousands_sep; char *grouping; char *int_curr_symbol; char *currency_symbol; char *mon_decimal_yiibai; 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

以下是每个字段的描述:

S.N. 字段&说明
1 decimal_yiibai
Decimal yiibai character used for non-monetary values.
2 thousands_sep
Thousands place separator character used for non-monetary values..
3 grouping
A string that indicates the size of each group of digits in non-monetary quantities. Each character represents an integer value which designates the number of digits in the current group. A value of 0 means that the previous value is to be used for the rest of the groups.
4 int_curr_symbol
A string of the international currency symbols used. The first three characters are those specified by ISO 4217:1987 and the fourth is the character which separates the currency symbol from the monetary quantity.
5 currency_symbol
The local symbol used for currency.
6 mon_decimal_yiibai
The decimal yiibai character used for monetary values.
7 mon_thousands_sep
The thousands place grouping character used for monetary values.
8 mon_grouping
A string whose elements define the size of the grouping of digits in monetary values. Each character represents an integer value which designates the number of digits in the current group. A value of 0 means that the previous value is to be used for the rest of the groups.
9 positive_sign
The character used for positive monetary values.
10 negative_sign
The character used for negative monetary values.
11 int_frac_digits
Number of digits to show after the decimal yiibai in international monetary values.
12 frac_digits
Number of digits to show after the decimal yiibai in monetary values.
13 p_cs_precedes
If equal to 1, then the currency_symbol appears before a positive monetary value. If equal to 0, then the currency_symbol appears after a positive monetary value.
14 p_sep_by_space
If equal to 1, then the currency_symbol is separated by a space from a positive monetary value. If equal to 0, then there is no space between the currency_symbol and a positive monetary value.
15 n_cs_precedes
If equal to 1, then the currency_symbol precedes a negative monetary value. If equal to 0, then the currency_symbol succeeds a negative monetary value.
16 n_sep_by_space
If equal to 1, then the currency_symbol is separated by a space from a negative monetary value. If equal to 0, then there is no space between the currency_symbol and a negative monetary value.
17 p_sign_posn
Represents the position of the positive_sign in a positive monetary value.
18 n_sign_posn
Represents the position of the negative_sign in a negative monetary value.

使用以下值为p_sign_posn和n_sign_posn:

描述
0 括号封装值和CURRENCY_SYMBOL的。the currency_symbol.
1 符号之前的值和currency_symbol.
2 该标志成功的值和currency_symbol.
3 符号立即之前的值和 currency_symbol.
4 符号立即成功的值和currency_symbol.