不可识别的字符转义序列，怎么回事??

[caddor]

CString badString(_T("`|~|!|@|#|$|%|^|&|*|(|)|-|=|+| |[|{|]|}|\|,|<|.|>|/|?|||")); //非法字符



警告 1 warning C4129: “|”: 不可识别的字符转义序列


自定义的 规则，过滤这些非法字符。。。

出现警告。。。

是不是：/ 这个字符的缘故，，， 可警告也不该报 | 不可识别啊

[caddor]

这个非法串，根据| ，split 后，保存到字符数组里面

然后到 输入字符的时候，和 字符数组进行比较。。。。

当时没有考虑到\ 这个字符带来的问题

现在倒好了。。。。。

按照你说的改，

那么split后， 字符数组怎么保存\\啊？？

\\是两个字符啊

TCHAR数组保存 非法字符



[Quote=引用 3 楼 qq120848369 的回复:]
引用 2 楼 qq120848369 的回复:
CString badString(_T("`|~|!|@|#|$|%|^|&amp;|*|(|)|-|=|+| |[|{|]|}|\|,|<|.|>|/|?|||"));

红色部分,悲剧!


忘了说，改成\\|
[/Quote]

[caddor]

还是写代码的是\\


程序把它当做\处理

只会保存\ 这个字符




[Quote=引用 6 楼 caddor 的回复:]
这个非法串，根据| ，split 后，保存到字符数组里面

然后到 输入字符的时候，和 字符数组进行比较。。。。

当时没有考虑到\ 这个字符带来的问题

现在倒好了。。。。。

按照你说的改，

那么split后， 字符数组怎么保存\\啊？？

\\是两个字符啊

TCHAR数组保存 非法字符




引用 3 楼 qq120848369 的回复:
引用 ……
[/Quote]

[赵4老师]

C++ Character Constants
Character constants are one or more members of the “source character set,” the character set in which a program is written, surrounded by single quotation marks ('). They are used to represent characters in the “execution character set,” the character set on the machine where the program executes.

Microsoft Specific

For Microsoft C++, the source and execution character sets are both ASCII.

END Microsoft Specific

There are three kinds of character constants:

Normal character constants


Multicharacter constants


Wide-character constants
Note Use wide-character constants in place of multicharacter constants to ensure portability.

Character constants are specified as one or more characters enclosed in single quotation marks. For example:

char ch = 'x'; // Specify normal character constant.
int mbch = 'ab'; // Specify system-dependent
// multicharacter constant.
wchar_t wcch = L'ab'; // Specify wide-character constant.

Note that mbch is of type int. If it were declared as type char, the second byte would not be retained. A multicharacter constant has four meaningful characters; specifying more than four generates an error message.

Syntax

character-constant :

'c-char-sequence'
L'c-char-sequence'

c-char-sequence :

c-char
c-char-sequence c-char

c-char :

any member of the source character set except the single quotation mark ('), backslash (\), or newline character
escape-sequence

escape-sequence :

simple-escape-sequence
octal-escape-sequence
hexadecimal-escape-sequence

simple-escape-sequence : one of

\' \" \? \\
\a \b \f \n \r \t \v

octal-escape-sequence :

\octal-digit
\octal-digit octal-digit
\octal-digit octal-digit octal-digit

hexadecimal-escape-sequence :

\xhexadecimal-digit
hexadecimal-escape-sequence hexadecimal-digit

Microsoft C++ supports normal, multicharacter, and wide-character constants. Use wide-character constants to specify members of the extended execution character set (for example, to support an international application). Normal character constants have type char, multicharacter constants have type int, and wide-character constants have type wchar_t. (The type wchar_t is defined in the standard include files STDDEF.H, STDLIB.H, and STRING.H. The wide-character functions, however, are prototyped only in STDLIB.H.)

The only difference in specification between normal and wide-character constants is that wide-character constants are preceded by the letter L. For example:

char schar = 'x'; // Normal character constant
wchar_t wchar = L'\x81\x19'; // Wide-character constant

Table 1.2 shows reserved or nongraphic characters that are system dependent or not allowed within character constants. These characters should be represented with escape sequences.

Table 1.2 C++ Reserved or Nongraphic Characters

Character ASCII
Representation ASCII
Value Escape Sequence
Newline NL (LF) 10 or 0x0a \n
Horizontal tab HT 9 \t
Vertical tab VT 11 or 0x0b \v
Backspace BS 8 \b
Carriage return CR 13 or 0x0d \r
Formfeed FF 12 or 0x0c \f
Alert BEL 7 \a
Backslash \ 92 or 0x5c \\
Question mark ? 63 or 0x3f \?
Single quotation mark ' 39 or 0x27 \'
Double quotation mark " 34 or 0x22 \"
Octal number ooo — \ooo
Hexadecimal number hhh — \xhhh
Null character NUL 0 \0


If the character following the backslash does not specify a legal escape sequence, the result is implementation defined. In Microsoft C++, the character following the backslash is taken literally, as though the escape were not present, and a level 1 warning (“unrecognized character escape sequence”) is issued.

Octal escape sequences, specified in the form \ooo, consist of a backslash and one, two, or three octal characters. Hexadecimal escape sequences, specified in the form \xhhh, consist of the characters \x followed by a sequence of hexadecimal digits. Unlike octal escape constants, there is no limit on the number of hexadecimal digits in an escape sequence.

Octal escape sequences are terminated by the first character that is not an octal digit, or when three characters are seen. For example:

wchar_t och = L'\076a'; // Sequence terminates at a
char ch = '\233'; // Sequence terminates after 3 characters

Similarly, hexadecimal escape sequences terminate at the first character that is not a hexadecimal digit. Because hexadecimal digits include the letters a through f (and A through F), make sure the escape sequence terminates at the intended digit.

Because the single quotation mark (') encloses character constants, use the escape sequence \' to represent enclosed single quotation marks. The double quotation mark (") can be represented without an escape sequence. The backslash character (\) is a line-continuation character when placed at the end of a line. If you want a backslash character to appear within a character constant, you must type two backslashes in a row (\\). (SeePhases of Translation in the Preprocessor Reference for more information about line continuation.)

[c_losed]

换个标志或直接用数组存

[qq120848369]

CString badString(_T("`|~|!|@|#|$|%|^|&|*|(|)|-|=|+| |[|{|]|}|\|,|<|.|>|/|?|||"));

红色部分,悲剧!

[qq120848369]

[Quote=引用 2 楼 qq120848369 的回复:]
CString badString(_T("`|~|!|@|#|$|%|^|&|*|(|)|-|=|+| |[|{|]|}|\|,|<|.|>|/|?|||"));

红色部分,悲剧!
[/Quote]

忘了说，改成\\|

[xiejijun_05]

[Quote=引用 3 楼 qq120848369 的回复:]
引用 2 楼 qq120848369 的回复:
CString badString(_T("`|~|!|@|#|$|%|^|&amp;|*|(|)|-|=|+| |[|{|]|}|\|,|<|.|>|/|?|||"));

红色部分,悲剧!


忘了说，改成\\|
[/Quote]
++

[luciferisnotsatan]

[Quote=引用 2 楼 qq120848369 的回复:]

CString badString(_T("`|~|!|@|#|$|%|^|&|*|(|)|-|=|+| |[|{|]|}|\|,|<|.|>|/|?|||"));

红色部分,悲剧!
[/Quote]
++