`putc.3p` ( 3 )

положить байт в поток (put a byte on a stream)

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)

putc — put a byte on a stream

Синопсис (Synopsis)

#include <stdio.h>

int putc(int c, FILE *stream);

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 putc() function shall be equivalent to fputc(), except that if it is implemented as a macro it may evaluate stream more than once, so the argument should never be an expression with side- effects.

Возвращаемое значение (Return value)

Refer to fputc(3p).

Ошибки (Error)

Refer to fputc(3p).

The following sections are informative.

Примеры (Examples)

None.

Использование в приложениях (Application usage)

Since it may be implemented as a macro, putc() may treat a stream argument with side-effects incorrectly. In particular, putc(c,*f++) does not necessarily work correctly. Therefore, use of this function is not recommended in such situations; fputc() should be used instead.

Обоснование (Rationale)

None.

Будущие направления (Future directions)