<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:
值 | 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. |