ungetc

Syntax

#include <stdio.h> int ungetc(int c, FILE *file);

Description

This function pushes c back into the file. You can only push back one character at a time.

Return Value

The pushed-back character, or EOF on error.

Portability

ANSI/ISO C	C89; C99
POSIX	1003.2-1992; 1003.1-2001

Example

int q; while (q = getc(stdin) != 'q'); ungetc(q);