From Cppreference
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int fseek( FILE *stream, long offset, int origin );
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Sets the file position indicator for the file stream stream to the value pointed to by pos. This function can be used to set the indicator beyond the actual end of the file, however, negative position values are not accepted.
[edit] Parameters
stream
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file stream to modify
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origin
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position to which offset is added. It can have one of the following values,
{{param list item | offset | number of characters to shift the position relative to origin
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[edit] Return value
0 upon success, nonzero value otherwise. Associated EOF flag is cleared for the stream.
[edit] See also
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moves the file position indicator to a specific location in a file (function)
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gets the file position indicator (function)
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returns the current file position indicator (function)
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moves the file position indicator to the beginning in a file (function)
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