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     The freopen function closes the file currently associated with
     <stream> and reassigns <stream> to the file specified by
     <filename>. The freopen function is typically used to redirect the
     preopened files stdin, stdout, and stderr to files specified by
     the user.
 
     The new file associated with <stream> is opened with <mode>, which
     is a character string specifying the type of access requested for
     the file.
 
     The valid types are "r" (read), "w" (write), and "a" (append).
     Any of these can be followed by a "+", which allows both read
     and write operations. The translation mode for newlines can be
     specified by adding a "t" (text) or a "b" (binary).
 
     See also the individual constants for access type and translation
     mode.
 
     See: ◄BINMODE.OBJ►
 
     Return Value
 
     The freopen function returns a pointer to the newly opened file.
     If an error occurs, the original file is closed and the function
     returns a NULL pointer value.
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