swscanf,swscanf_sc
关于sscanf的问题
请检查你的s[i]是什么内容，还有第二个sscanf少了一个d，是%d！
================
"%fl" 你写反了,是lf( long float)
sscanf(...,"%lf\t",d);可以读
具体你看下面的msdn吧
Read formatted data from a string. These functions are deprecated because more secure versions are available; see sscanf_s, _sscanf_s_l, swscanf_s, _swscanf_s_l.
int sscanf(
const char *buffer,
const char *format [,
argument ] ...
);
int _sscanf_l(
const char *buffer,
const char *format,
locale_t locale [,
argument ] ...
);
int swscanf(
const wchar_t *buffer,
const wchar_t *format [,
argument ] ...
);
int _swscanf_l(
const wchar_t *buffer,
const wchar_t *format,
locale_t locale [,
argument ] ...
);
Parameters
buffer
Stored data
format
Format-control string. For more information, see Format Specifications.
argument
Optional arguments
locale
The locale to use
Return Value
Each of these functions returns the number of fields successfully converted and assigned; the return value does not include fields that were read but not assigned. A return value of 0 indicates that no fields were assigned. The return value is EOF for an error or if the end of the string is reached before the first conversion.
If buffer or format is a NULL pointer, the invalid parameter handler is invoked, as described in Parameter Validation. If execution is allowed to continue, these functions return -1 and set errno to EINVAL.
For information on these and other error codes, see _doserrno, errno, _sys_errlist, and _sys_nerr.
Remarks
The sscanf function reads data from buffer into the location given by each argument. Every argument must be a pointer to a variable with a type that corresponds to a type specifier in format. The format argument controls the interpretation of the input fields and has the same form and function as the format argument for the scanf function. If copying takes place between strings that overlap, the behavior is undefined.
Security Note
When reading a string with sscanf, always specify a width for the %s format (for example, "%32s" instead of "%s"); otherwise, improperly formatted input can easily cause a buffer overrun.
swscanf is a wide-character version of sscanf; the arguments to swscanf are wide-character strings. sscanf does not handle multibyte hexadecimal characters. swscanf does not handle Unicode full-width hexadecimal or "compatibility zone" characters. Otherwise, swscanf and sscanf behave identically.
The versions of these functions with the _l suffix are identical except that they use the locale parameter passed in instead of the current thread locale.
Generic-Text Routine Mappings
TCHAR.H routine _UNICODE _MBCS not defined _MBCS defined _UNICODE defined
_stscanf
sscanf
sscanf
swscanf
_stscanf_l
_sscanf_l
_sscanf_l
_swscanf_l
Requirements
Routine Required header Compatibility
sscanf, _sscanf_l
stdio.h
ANSI, Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003
swscanf, _swscanf_l
stdio.h or wchar.h
ANSI, Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003
For additional compatibility information, see Compatibility in the Introduction.
Example
Copy Code
// crt_sscanf.c
// compile with: /W1
// This program uses sscanf to read data items
// from a string named tokenstring, then displays them.
#include stdio.h
int main( void )
{
char tokenstring[] = "15 12 14...";
char s[81];
char c;
int i;
float fp;
// Input various data from tokenstring:
// max 80 character string:
sscanf( tokenstring, "%80s", s ); // C4996
sscanf( tokenstring, "%c", c ); // C4996
sscanf( tokenstring, "%d", i ); // C4996
sscanf( tokenstring, "%f", fp ); // C4996
// Note: sscanf is deprecated; consider using sscanf_s instead
// Output the data read
printf( "String = %s\n", s );
printf( "Character = %c\n", c );
printf( "Integer: = %d\n", i );
printf( "Real: = %f\n", fp );
}
Output
String = 15
Character = 1
Integer: = 15
Real: = 15.000000
.NET Framework Equivalent
See Parse methods, such as System::Double::Parse.
See Also
Reference
Stream I/O
fscanf, _fscanf_l, fwscanf, _fwscanf_l
scanf, _scanf_l, wscanf, _wscanf_l
sprintf, _sprintf_l, swprintf, _swprintf_l, __swprintf_l
_snprintf, _snprintf_l, _snwprintf, _snwprintf_l
地址：
ms-help://MS.VSCC.v80/MS.MSDN.v80/MS.VisualStudio.v80.chs/dv_vccrt/html/c2dcf0d2-9798-499f-a4a8-06f7e2b9a80c.htm
MFC读取文件的问题(主要是CString问题)
你既然都用了字符串泛型宏_T()了
那就用_stscanf_s吧，这样不管是UNICODE还是多字节字符集都可以
还有你scanf里用CString是肯定不行的 scanf是向一个缓冲区中填东西
CString在空构造下显然是不会分配内存的，内部的指针是NULL，属于禁止访问内存区，
肯定报Access violation错误；
应该用TCHAR buff[21]
你可以这样：
CString?str;
int?tempint[10];
CString?tempstr[5];
TCHAR?buff[21];
for(?int?i?=?0?;?i??10?;?i?+=?2?)
{
????tempfile.ReadString(?str?);
????_stscanf_s(?str?,?_T("%6d%6d%20s"),?tempint[i],?tempint[i+1],?buff,?_countof(buff));
????tempstr[i/2]?=?buff;
}
C语言读取文本文件中的科学数据
首先，i的初始值要赋值成0，i++的位置不对，会影响到后面的printf语句，然后请记住ccs的printf遇到\n才能完成输出，while循环修改一下：
i=0;
while
(
!feof(fp)
)
{
fscanf(fp,
"%lf",
keys[i]);
printf("%lf\n",keys[i]);
i++;
}