NAME

getchar — get a byte from a stdin stream

SYNOPSIS

#include <stdio.h>

int getchar(void);


DESCRIPTION

^[CX] 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.1-2024 defers to the ISO C standard.

The getchar() function shall be equivalent to getc(stdin).

RETURN VALUE

Refer to fgetc.

ERRORS

Refer to fgetc.

EXAMPLES

None.

APPLICATION USAGE

If the integer value returned by getchar() is stored into a variable of type char and then compared against the integer constant EOF, the comparison may never succeed, because sign-extension of a variable of type char on widening to integer is implementation-defined.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

2.5 Standard I/O Streams, getc

XBD <stdio.h>

CHANGE HISTORY

First released in Issue 1. Derived from Issue 1 of the SVID.

Issue 7

POSIX.1-2008, Technical Corrigendum 1, XSH/TC1-2008/0236 [14] is applied.