форматировать ввод списка аргументов stdarg (format input of a stdarg argument list)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
vfscanf, vscanf, vsscanf — format input of a stdarg argument list
Синопсис (Synopsis)
#include <stdarg.h>
#include <stdio.h>
int vfscanf(FILE *restrict stream, const char *restrict format,
va_list arg);
int vscanf(const char *restrict format, va_list arg);
int vsscanf(const char *restrict s, const char *restrict format,
va_list arg);
Описание (Description)
The functionality described on this reference page is aligned
with the ISO C standard. Any conflict between the requirements
described here and the ISO C standard is unintentional. This
volume of POSIX.1‐2017 defers to the ISO C standard.
The vscanf(), vfscanf(), and vsscanf() functions shall be
equivalent to the scanf(), fscanf(), and sscanf() functions,
respectively, except that instead of being called with a variable
number of arguments, they are called with an argument list as
defined in the <stdarg.h> header. These functions shall not
invoke the va_end macro. As these functions invoke the va_arg
macro, the value of ap after the return is unspecified.
Возвращаемое значение (Return value)
Refer to fscanf(3p).
Ошибки (Error)
Refer to fscanf(3p).
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
Applications using these functions should call va_end(ap)
afterwards to clean up.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
Section 2.5, Standard I/O Streams, fscanf(3p)
The Base Definitions volume of POSIX.1‐2017, stdarg.h(0p),
stdio.h(0p)
