ungetc(3s) ungetc(3s)
Name
ungetc - push character back into input stream
Syntax
#include <stdio.h>
ungetc(c, stream)
FILE *stream;
Description
The routine pushes the character c back on an input stream. That character will be returned by the next call on that stream. The routine
returns c. One character of pushback is guaranteed in all cases.
The routine erases all memory of pushed back characters.
Diagnostics
The routine returns EOF if it cannot push a character back.
Environment
In POSIX mode, the file's EOF indicator is cleared.
See Also
fseek(3s), getc(3s), setbuf(3s)
ungetc(3s)
