230400byte를 파일에서 읽어야 합니다.

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In addition to the above values, the following characters can be
included in mode to specify the translation mode for newline characters:

t
Open in text (translated) mode. In this mode, CTRL+Z is interpreted as
an end-of-file character on input. In files opened for reading/writing
with "a+", fopen checks for a CTRL+Z at the end of the file and removes
it, if possible. This is done because using fseek and ftell to move
within a file that ends with a CTRL+Z, may cause fseek to behave
improperly near the end of the file.
Also, in text mode, carriage return–linefeed combinations are
translated into single linefeeds on input, and linefeed characters are
translated to carriage return–linefeed combinations on output. When a
Unicode stream-I/O function operates in text mode (the default), the
source or destination stream is assumed to be a sequence of multibyte
characters. Therefore, the Unicode stream-input functions convert
multibyte characters to wide characters (as if by a call to the mbtowc
function). For the same reason, the Unicode stream-output functions
convert wide characters to multibyte characters (as if by a call to the
wctomb function).

b
Open in binary (untranslated) mode; translations involving carriage-
return and linefeed characters are suppressed.
If t or b is not given in mode, the default translation mode is defined
by the global variable _fmode. If t or b is prefixed to the argument,
the function fails and returns NULL.

For more information about using text and binary modes in Unicode and
multibyte stream-I/O, see Text and Binary Mode File I/O and Unicode
Stream I/O in Text and Binary Modes.
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