C Language: ungetc function
(Unread Character)
In the C Programming Language, the ungetc function puts a character back onto the stream pointed to by stream and clears the end-of-file indicator for stream.
Syntax
The syntax for the ungetc function in the C Language is:
int ungetc(int c, FILE *stream);
- c
- The character to put back onto the stream.
- stream
- The stream to modify.
Returns
The ungetc function returns the character that is put back. If an error occurs because too many attempts are made to put back characters without a read or file positioning operation, the ungetc function will return EOF.
Required Header
In the C Language, the required header for the ungetc function is:
#include <stdio.h>
Applies To
In the C Language, the ungetc function can be used in the following versions:
- ANSI/ISO 9899-1990
See Also
Other C functions that are noteworthy when dealing with the ungetc function:
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