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, POSIX

Example

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

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