Defined in header <stdio.h> | ||
---|---|---|
void rewind( FILE *stream ); |
Moves the file position indicator to the beginning of the given file stream.
The function is equivalent to fseek(stream, 0, SEEK_SET);
, except that end-of-file and error indicators are cleared.
The function drops any effects from previous calls to ungetc
.
Parameters
stream | - | file stream to modify |
Return value
(none).
Example
This example shows how to read a file twice.
#include <stdio.h> char str[20]; int main(void) { FILE *f; char ch; f = fopen("file.txt", "w"); for (ch = '0'; ch <= '9'; ch++) { fputc(ch, f); } fclose(f); f = fopen("file.txt", "r"); fread(str, 1, 10, f); puts(str); rewind(f); fread(str, 1, 10, f); puts(str); fclose(f); return 0; }
Output:
0123456789 0123456789
References
- C11 standard (ISO/IEC 9899:2011):
- 7.21.9.5 The rewind function (p: 338)
- C99 standard (ISO/IEC 9899:1999):
- 7.19.9.5 The rewind function (p: 304)
- C89/C90 standard (ISO/IEC 9899:1990):
- 4.9.9.5 The rewind function
See also
moves the file position indicator to a specific location in a file (function) | |
C++ documentation for rewind |
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