getchar : read a character (macro)

Synopsis

#include <stdio.h>
int getchar(void);
int _getchar_r(void *reent);
```### Description

getchar is a macro, defined in stdio.h. You can use getchar to get the next single character from the standard input stream. As a side effect, getchar advances the standard input's current position indicator.

The alternate function _getchar_r is a reentrant version. The extra argument reent is a pointer to a reentrancy structure.### Returns

The next character (read as an unsigned char, and cast to int), unless there is no more data, or the host system reports a read error; in either of these situations, getchar returns EOF.

You can distinguish the two situations that cause an EOF result by using `ferror(stdin)' and `feof(stdin)'.

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**Authoritative source**: BUSMASTER DITA help source `getchar.dita`, compiled into `BUSMASTER.CHM` with the application.