原因：残留文件存在导致。解决方法：删除注册表来解决此问题。

如下参考：

1、先添加/删除过程，完全删除SQLserver。

2.将不删除的SQLserver目录也删除。

3.、打开注册表编辑器，在HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SessionManager中查找PendingFileRenameOperations项目，并删除它。这是为了清除挂起项的安装。

4.删除与sqlserver相关的注册表文件sqlserver无法安装，电脑重启后即可以下载SQL2016了。

msdn里没有RTM版win8.1，只有win8的，上面的那个网址请自行输入后下载

如果确定win+r输入slmgr -xpr显示的是coresinglelanguage，那你就是单语言版，否则就是corecountryspecific

直接下载win8.1 with update是一样的，就算你下载了build 9600，也就是最初的正式版win8.1，这个update也是会推送的，当然你不打算更新的话我再找9600

有问题请直接问

具体百度fopen

以下为MSDN对fopen的解释和例子，可参考：

fopen, _wfopen

Open a file.

FILE *fopen( const char

*filename, const char *mode

)

FILE *_wfopen( const wchar_t

*filename, const wchar_t *mode

)

Function

Required Header

Compatibility

fopen

<stdio.h>

ANSI, Win 95, Win NT

_wfopen

<stdio.h>or <wchar.h>

Win NT

For additional compatibility information, see Compatibility in the Introduction.

Libraries

LIBC.LIB

Single thread static library, retail version

LIBCMT.LIB

Multithread static library, retail version

MSVCRT.LIB

Import library for MSVCRT.DLL, retail

version

The c, n, and t mode options are Microsoft

extensions for fopen and _fdopen and should not be used where ANSI

portability is desired.

Return Value

Each of these functions returns a pointer to the open file. A null pointer

value indicates an error.

Parameters

filename

Filename

mode

Type of access permitted

Remarks

The fopen function opens the file specified by filename.

_wfopen is a wide-character version of fopenthe arguments to

_wfopen are wide-character strings. _wfopen and fopen

behave identically otherwise.

Generic-Text Routine Mappings

TCHAR.H Routine

_UNICODE &_MBCS Not Defined

_MBCS Defined

_UNICODE Defined

_tfopen

fopen

fopen

_wfopen

The character string mode specifies the type of access requested for

the file, as follows:

"r"

Opens for reading. If the file does not exist or cannot be

found, the fopen call fails.

"w"

Opens an empty file for writing. If the given file exists, its

contents are destroyed.

"a"

Opens for writing at the end of the file (appending) without

removing the EOF marker before writing new data to the filecreates the file

first if it doesn’t exist.

"r+"

Opens for both reading and writing. (The file must exist.)

"w+"

Opens an empty file for both reading and writing. If the given

file exists, its contents are destroyed.

"a+"

Opens for reading and appendingthe appending operation

includes the removal of the EOF marker before new data is written to the file

and the EOF marker is restored after writing is completecreates the file first

if it doesn’t exist.

When a file is opened with the "a" or "a+" access type, all

write operations occur at the end of the file. The file pointer can be

repositioned using fseek or rewind, but is always moved back to

the end of the file before any write operation is carried out. Thus, existing

data cannot be overwritten.

The "a" mode does not remove the EOF marker before appending to the

file. After appending has occurred, the MS-DOS TYPE command only shows data up

to the original EOF marker and not any data appended to the file. The

"a+" mode does remove the EOF marker before appending to the file. After

appending, the MS-DOS TYPE command shows all data in the file. The "a+"

mode is required for appending to a stream file that is terminated with the

CTRL+Z EOF marker.

When the "r+", "w+", or "a+" access type is specified,

both reading and writing are allowed (the file is said to be open for “update”).

However, when you switch between reading and writing, there must be an

intervening fflush, fsetpos, fseek, or rewind

operation. The current position can be specified for the fsetpos or

fseek operation, if desired.

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) modetranslations 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.

c

Enable the commit flag for the associated filename so

that the contents of the file buffer are written directly to disk if either

fflush or _flushall is called.

n

Reset the commit flag for the associated filename to

“no-commit.” This is the default. It also overrides the global commit flag if

you link your program with COMMODE.OBJ. The global commit flag default is

“no-commit” unless you explicitly link your program with COMMODE.OBJ.

Valid characters for the mode string used in fopen and

_fdopen correspond to oflag arguments used in _open and _sopen, as follows.

Characters in mode String

Equivalent oflag Value for

_open/_sopen

a

_O_WRONLY | _O_APPEND (usually _O_WRONLY | _O_CREAT |

_O_APPEND)

a+

_O_RDWR | _O_APPEND (usually _O_RDWR | _O_APPEND |

_O_CREAT )

r

_O_RDONLY

r+

_O_RDWR

w

_O_WRONLY (usually _O_WRONLY | _O_CREAT |

_O_TRUNC)

w+

_O_RDWR (usually _O_RDWR | _O_CREAT |

_O_TRUNC)

b

_O_BINARY

t

_O_TEXT

c

None

n

None

Example

/* FOPEN.C: This program opens files named "data"

* and "data2".It uses fclose to close "data" and

* _fcloseall to close all remaining files.

*/

#include <stdio.h>

FILE *stream, *stream2

void main( void )

{

int numclosed

/* Open for read (will fail if file "data" does not exist) */

if( (stream = fopen( "data", "r" )) == NULL )

printf( "The file 'data' was not opened\n" )

else

printf( "The file 'data' was opened\n" )

/* Open for write */

if( (stream2 = fopen( "data2", "w+" )) == NULL )

printf( "The file 'data2' was not opened\n" )

else

printf( "The file 'data2' was opened\n" )

/* Close stream */

if( fclose( stream ) )

printf( "The file 'data' was not closed\n" )

/* All other files are closed: */

numclosed = _fcloseall( )

printf( "Number of files closed by _fcloseall: %u\n", numclosed )

}

Output

The file 'data' was opened

The file 'data2' was opened

Number of files closed by _fcloseall: 1