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c:stdio.h:rewind [2013/01/22 22:02] |
c:stdio.h:rewind [2024/02/16 01:05] (current) |
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+ | {{keywords>wiki library source code example reference}} | ||
+ | ===== rewind ===== | ||
+ | |||
+ | <code c> | ||
+ | void rewind(FILE *stream); | ||
+ | </code> | ||
+ | |||
+ | equal like fseek(stream, 0L, SEEK_SET); clearerr(stream); | ||
+ | Resets the read pointer to the beginning of the File and clear the error | ||
+ | indicator | ||
+ | |||
+ | ===== C Sourcecode Example ===== | ||
+ | <code c> | ||
+ | /* | ||
+ | * rewind example code | ||
+ | * http://code-reference.com/c/stdio.h/rewind | ||
+ | */ | ||
+ | |||
+ | #include <stdio.h> /* including standard library */ | ||
+ | //#include <windows.h> /* uncomment this for Windows */ | ||
+ | |||
+ | |||
+ | int main (void) { | ||
+ | FILE *stream; | ||
+ | int c; | ||
+ | long seek_position; | ||
+ | |||
+ | seek_position = 21; | ||
+ | |||
+ | stream=fopen("test.txt", "r" ); | ||
+ | |||
+ | if (stream == 0) { | ||
+ | perror("cannot open file"); | ||
+ | return 0; | ||
+ | } | ||
+ | |||
+ | while( (c=getc(stream)) != EOF) { | ||
+ | putc(c, stdout); | ||
+ | } | ||
+ | |||
+ | /* Set Position with rewind to the beginning of the file */ | ||
+ | rewind(stream); | ||
+ | |||
+ | /* SET SEEK CUR to 20 char of the file */ | ||
+ | fseek(stream, seek_position, SEEK_CUR ); | ||
+ | |||
+ | while( (c=getc(stream)) != EOF) { | ||
+ | putc(c, stdout); | ||
+ | } | ||
+ | return 0; | ||
+ | } | ||
+ | </code> | ||
+ | |||
+ | |||
+ | === content of test.txt === | ||
+ | <code c> | ||
+ | Test example file for code-reference.com rewind source code | ||
+ | </code> | ||
+ | |||
+ | ==== output ==== | ||
+ | output: ./rewind | ||
+ | Test example file for code-reference.com rewind source code | ||
+ | code-reference.com rewind source code | ||
+ | |||
+ | |||
+ | |||
+ | see also [[c:stdio.h:fseek|]] | ||