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Algorithms Algorithms(算法) bsearch bsearch_s qsort qsort_s Atomic operations Atomic operations library(原子操作库) ATOMIC_*_LOCK_FREE atomic_compare_exchange_strong atomic_compare_exchange_strong_explicit atomic_compare_exchange_weak atomic_compare_exchange_weak_explicit atomic_exchange atomic_exchange_explicit atomic_fetch_add atomic_fetch_add_explicit atomic_fetch_and atomic_fetch_and_explicit atomic_fetch_or atomic_fetch_or_explicit atomic_fetch_sub atomic_fetch_sub_explicit atomic_fetch_xor atomic_fetch_xor_explicit atomic_flag atomic_flag_clear atomic_flag_clear_explicit ATOMIC_FLAG_INIT atomic_flag_test_and_set atomic_flag_test_and_set_explicit atomic_init atomic_is_lock_free atomic_load atomic_load_explicit atomic_signal_fence atomic_store atomic_store_explicit atomic_thread_fence(线程围栏) ATOMIC_VAR_INIT kill_dependency memory_order(内存排序) C keywords auto(自动存储) break(跳出循环) C keywords(关键词) case char const(常量修饰符) continue default(预设运算式) do double(双精度浮点型) else enum(枚举类型) extern(全局变量) float(浮点数) for fortran goto(goto语句) if(if语句) inline(行内函式) int long(长整型) register(寄存器变量) restrict( restrict类型限定符) return short signed sizeof(sizeof运算符) static(静态变量) struct(结构体) switch(switch语句) typedef(typedef关键字) union(联合体) unsigned(无符号) void(空类型) volatile(volatile变量) while(while语句) _Alignas _Alignof _Atomic _Bool _Complex _Generic _Imaginary _Noreturn _Static_assert _Thread_local C language #define directive #elif directive #else directive #endif directive #error directive #if directive #ifdef directive #ifndef directive #include directive #line directive #pragma directive alignas(对齐指定符) Alternative operators and tokens(替代运算符和令牌) Analyzability Arithmetic operators Arithmetic types Array declaration(数组声明) Array initialization(阵列初始化) ASCII Chart Assignment operators(赋值运算符) types(atomic类型限定符) Basic concepts Bit fields(位域) break statement C language C Operator Precedence cast operator character constant(字符字面量) Comments(注释符) Comparison operators(比较运算符) compound literals(符合字面量) Conditional 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Static storage duration(静态存储周期) Storage-class specifiers(存储类说明符) string literals(字符串字面量) Struct and union initialization(结构体与联合体初始化) Struct declaration(结构体声明) switch statement Thread storage duration(线程存储时间) Type Type(类型) Typedef declaration(Typedef声明) Undefined behavior(未定义行为) Union declaration(联合体声明) Value categories(值类别) Variadic arguments(变长参数宏) volatile type qualifier(volatile 类型限定符) while loop _Alignof operator _Noreturn function specifier Date and time asctime(asctime函数) asctime_s clock CLOCKS_PER_SEC clock_t ctime(ctime函数) ctime_s Date and time utilities(日期和时间库) difftime(计算两个时间的间隔) gmtime gmtime_s localtime localtime_s mktime(将时间结构数据转换成经过的秒数的函数) strftime(格式化输出时间函数) time timespec timespec_get time_t tm wcsftime(格式化时间宽字符) Dynamic memory management aligned_alloc C memory management library(内存管理库) calloc free(释放动态分配空间的函数) malloc(动态分配内存空间的函数) realloc(重新分配内存空间的函数) Error handling abort_handler_s assert(断言) constraint_handler_t errno(错误报告) Error handling(错误处理) Error numbers(错误个数) ignore_handler_s set_constraint_handler_s static_assert File input/output clearerr(清除/复位) fclose feof ferror fflush(清空文件缓冲区) fgetc fgetpos fgets fgetwc fgetws File input/output fopen fopen_s fprintf fprintf_s fputc fputs fputwc fputws fread freopen freopen_s fscanf fscanf_s fseek fsetpos ftell fwide fwprintf fwprintf_s fwrite fwscanf fwscanf_s getc getchar gets gets_s getwchar perror printf printf_s putc putchar puts putwc putwchar remove rename rewind scanf scanf_s setbuf setvbuf snprintf sprintf sscanf sscanf_s swprintf swprintf_s swscanf swscanf_s tmpfile tmpfile_s tmpnam tmpnam_s ungetc ungetwc vfprintf vfprintf_s vfscanf vfscanf_s vfwprintf vfwprintf_s vfwscanf vfwscanf_s vprintf vprintf_s vscanf vscanf_s vsnprintf vsprintf vsscanf vsscanf_s vswprintf vswprintf_s vswscanf vswscanf_s vwprintf vwprintf_s vwscanf vwscanf_s wprintf wprintf_s wscanf wscanf_s Localization support lconv LC_ALL LC_COLLATE LC_CTYPE LC_MONETARY LC_NUMERIC LC_TIME localeconv Localization support setlocale Numerics abs acos acosf acosh acoshf acoshl acosl asin asinf asinh asinhf asinhl asinl atan atan2 atan2f atan2l atanf atanh atanhf atanhl atanl cabs cabsf cabsl cacos cacosf cacosh cacoshf cacoshl cacosl carg cargf cargl casin casinf casinh casinhf casinhl casinl catan catanf catanh catanhf catanhl catanl cbrt cbrtf cbrtl ccos ccosf ccosh ccoshf ccoshl ccosl ceil ceilf ceill cexp cexpf cexpl cimag cimagf cimagl clog clogf clogl CMPLX CMPLXF CMPLXL Common mathematical functions complex Complex number arithmetic conj conjf conjl copysign copysignf copysignl cos cosf cosh coshf coshl cosl cpow cpowf cpowl cproj cprojf cprojl creal crealf creall csin csinf csinh csinhf csinhl csinl csqrt csqrtf csqrtl ctan ctanf ctanh ctanhf ctanhl ctanl div double_t erf erfc erfcf erfcl erff erfl exp exp2 exp2f exp2l expf expl expm1 expm1f expm1l fabs fabsf fabsl fdim feclearexcept fegetenv fegetexceptflag fegetround feholdexcept feraiseexcept fesetenv fesetexceptflag fesetround fetestexcept feupdateenv FE_ALL_EXCEPT FE_DFL_ENV FE_DIVBYZERO FE_DOWNWARD FE_INEXACT FE_INVALID FE_OVERFLOW FE_TONEAREST FE_TOWARDZERO FE_UNDERFLOW FE_UPWARD Floating-point environment float_t floor floorf floorl fma fmaf fmal fmax fmaxf fmaxl fmin fminf fminl fmod fmodf fmodl fpclassify FP_INFINITE FP_NAN FP_NORMAL FP_SUBNORMAL FP_ZERO frexp frexpf frexpl HUGE_VAL HUGE_VALF HUGE_VALL hypot hypotf hypotl I ilogb ilogbf ilogbl imaginary imaxabs imaxdiv INFINITY isfinite isgreater isgreaterequal isinf isless islessequal islessgreater isnan isnormal isunordered labs ldexp ldexpf ldexpl ldiv lgamma lgammaf lgammal llabs lldiv llrint llrintf llrintl llround llroundf llroundl log log10 log10f log10l log1p log1pf log1pl log2 log2f log2l logb logbf logbl logf logl lrint lrintf lrintl lround lroundf lroundl MATH_ERREXCEPT math_errhandling MATH_ERRNO modf modff modfl nan NAN nanf nanl nearbyint nearbyintf nearbyintl nextafter nextafterf nextafterl nexttoward nexttowardf nexttowardl Numerics pow powf powl Pseudo-random number generation rand RAND_MAX remainder remainderf remainderl remquo remquof remquol rint rintf rintl round roundf roundl scalbln scalblnf scalblnl scalbn scalbnf scalbnl signbit sin sinf sinh sinhf sinhl sinl sqrt sqrtf sqrtl srand tan tanf tanh tanhf tanhl tanl tgamma tgammaf tgammal trunc truncf truncl Type-generic math _Complex_I _Imaginary_I Program support abort atexit at_quick_exit exit EXIT_FAILURE EXIT_SUCCESS getenv getenv_s jmp_buf longjmp Program support utilities quick_exit raise setjmp SIGABRT SIGFPE SIGILL SIGINT signal SIGSEGV SIGTERM sig_atomic_t SIG_DFL SIG_ERR SIG_IGN system _Exit Strings atof atoi atol atoll btowc c16rtomb c32rtomb char16_t char32_t isalnum isalpha isblank iscntrl isdigit isgraph islower isprint ispunct isspace isupper iswalnum iswalpha iswblank iswcntrl iswctype iswdigit iswgraph iswlower iswprint iswpunct iswspace iswupper iswxdigit isxdigit mblen mbrlen mbrtoc16 mbrtoc32 mbrtowc mbsinit mbsrtowcs mbsrtowcs_s mbstate_t mbstowcs mbstowcs_s mbtowc memchr memcmp memcpy memcpy_s memmove memmove_s memset memset_s Null-terminated byte strings Null-terminated multibyte strings Null-terminated wide strings strcat strcat_s strchr strcmp strcoll strcpy strcpy_s strcspn strerror strerrorlen_s strerror_s Strings library strlen strncat Thread support call_once cnd_broadcast cnd_destroy cnd_init cnd_signal cnd_timedwait cnd_wait mtx_destroy mtx_init mtx_lock mtx_plain mtx_recursive mtx_timed mtx_timedlock mtx_trylock mtx_unlock once_flag ONCE_FLAG_INIT thrd_busy thrd_create thrd_current thrd_detach thrd_equal thrd_error thrd_exit thrd_join thrd_nomem thrd_sleep thrd_success thrd_timedout thrd_yield Thread support library thread_local tss_create tss_delete TSS_DTOR_ITERATIONS tss_get tss_set Type support Boolean type support library Fixed width integer types FLT_EVAL_METHOD FLT_ROUNDS max_align_t NULL Numeric limits offsetof ptrdiff_t size_t Type support Variadic functions Variadic functions va_arg va_copy va_end va_list va_start
문자

在头文件<locale.h>中定义



struct lconv;



该结构lconv包含由C语言环境定义的数字和货币格式规则。这个结构体的对象可以用localeconv。成员lconv是类型char和类型的值char*char*除了decimal_point可能指向一个空字符(即,在一个空的C字符串)之外的每个成员。类型的成员char都是非负数,CHAR_MAX如果相应的值在当前C语言环境中不可用,则这些成员中的任何一个都可能是。

会员对象

非金钱数字格式化参数

char * decimal_point

用作小数点的字符(公共成员对象)

char * thousands_sep

用于在小数点之前分隔数字组的字符(公共成员对象)

char *分组

一个字符串,其元素指示数字组的大小(公共成员对象)

货币数字格式参数

char * mon_decimal_point

用作小数点的字符(公共成员对象)

char * mon_thousands_sep

用于在小数点之前分隔数字组的字符(公共成员对象)

char * mon_grouping

一个字符串,其元素指示数字组的大小(公共成员对象)

char * positive_sign

用于表示非负金钱数量的字符串(公共成员对象)

char * negative_sign

用于表示负数货币数量的字符串(公共成员对象)

本地货币数字格式参数

char * currency_symbol

用于当前C语言环境中货币的符号(公共成员对象)

char frac_digits

小数点后要显示的数字数量(公共成员对象)

char p_cs_precedes

1如果currency_symbol放置在非负值之前,则为0(公共成员对象之后)

char n_cs_precedes

1如果currency_symbol放置在负值之前,则为0(公共成员对象之后)

char p_sep_by_space

指示currency_symbol,positive_sign和非负的货币值(公共成员对象)的分隔

char n_sep_by_space

指示currency_symbol,negative_sign和负的货币值(公共成员对象)的分离

char p_sign_posn

指示positive_sign在非负货币值(公共成员对象)中的位置

char n_sign_posn

指示negative_sign在负数货币值(公共成员对象)中的位置

国际货币数字格式参数

char * int_curr_symbol

在当前C语言环境(公共成员对象)中用作国际货币名称的字符串

char int_frac_digits

国际货币数量(公共会员对象)显示小数点后的位数

char int_p_cs_precedes(C99)

1如果currency_symbol在非负的国际货币价值之前放置,如果在(公共成员对象)之后为0,

char int_n_cs_precedes(C99)

1如果currency_symbol被置于负国际货币值之前,则0(如果在公共成员对象之后)

char int_p_sep_by_space(C99)

表示currency_symbol,positive_sign和非负的国际货币价值(公共成员对象)的分离,

char int_n_sep_by_space(C99)

指示currency_symbol,negative_sign和负的国际货币价值(公共成员对象)的分离,

char int_p_sign_posn(C99)

表示positive_sign在非负的国际货币价值(公共成员对象)中的位置

char int_n_sign_posn(C99)

指示negative_sign在负国际货币价值(公共成员对象)中的位置

指向的C字符串的字符groupingmon_grouping根据其数值解释。当'\0'遇到终止时,假定最后一个值被重复用于剩下的数字。如果CHAR_MAX遇到,则不再分组。一次三位数的典型分组是"\003"

p_sep_by_spacen_sep_by_spaceint_p_sep_by_spaceint_n_sep_by_space解释如下:

0

没有空格分隔货币符号和价值

1

标志贴在货币符号上,值由空格分隔

2

标志坚持价值。货币符号由空格分隔

p_sign_posnn_sign_posnint_p_sign_posnint_n_sign_posn解释如下:

0

值和货币符号周围的括号用于表示符号

1

在价值和货币符号之前签名

2

在价值和货币符号之后签字

3

在货币符号前签字

4

在货币符号后面签字


#include <locale.h>#include <stdio.h>
 int main(void){    setlocale(LC_ALL, "ja_JP.UTF-8");
    struct lconv *lc = localeconv();    printf("Japanese currency symbol: %s(%s)\n", lc->currency_symbol, lc->int_curr_symbol);}


可能的输出:


Japanese currency symbol: ¥(JPY )


参考

  • C11标准(ISO/IEC 9899:2011):

    • 7.11 / 2本地化<locale.h>(p:223)

  • C99标准(ISO/IEC 9899:1999):

    • 7.11 / 2本地化<locale.h>(p:204)

  • C89 / C90标准(ISO/IEC 9899:1990):

    • 4.4本地化<locale.h>

另请参阅

localeconv

查询当前语言环境(函数)的数字和货币格式详细信息

| C++ documentation for lconv |

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