用transform如何实现希腊字母、俄文字母的大小写转换。

[lcy_888]

我转换英文大小写的代码如下：
transform(tmp.begin(), tmp.end(), tmp.begin(), tolower);
换在希腊字母，就不行了，不知是不是tolower参数不对。

[宋寒松]

transform只是针对ASCII字符的吧，你的希腊字母需要自己写。

[lcy_888]

就没有其它办法啦？

[lcy_888]

比如设置字符集等。

[赵4老师]

使用Unicode字符集或多字节字符集，设置相应的locale 参考CRT\SRC\GETQLOC.C的内容。

[赵4老师]

tolower, _tolower, towlower Convert character to lowercase. int tolower( int c ); int _tolower( int c ); int towlower( wint_t c ); Routine Required Header Compatibility tolower <stdlib.h> and <ctype.h> ANSI, Win 95, Win NT _tolower <ctype.h> Win 95, Win NT towlower <ctype.h> or <wchar.h> ANSI, Win 95, 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 Return Value Each of these routines converts a copy of c, if possible, and returns the result. There is no return value reserved to indicate an error. Parameter c Character to convert Remarks Each of these routines converts a given uppercase letter to a lowercase letter if possible and appropriate. Data Conversion Routines See Also is Routines, to Functions Overview Example /* TOUPPER.C: This program uses toupper and tolower to * analyze all characters between 0x0 and 0x7F. It also * applies _toupper and _tolower to any code in this * range for which these functions make sense. */ #include <conio.h> #include <ctype.h> #include <string.h> char msg[] = "Some of THESE letters are Capitals\r\n"; char *p; void main( void ) { _cputs( msg ); /* Reverse case of message. */ for( p = msg; p < msg + strlen( msg ); p++ ) { if( islower( *p ) ) _putch( _toupper( *p ) ); else if( isupper( *p ) ) _putch( _tolower( *p ) ); else _putch( *p ); } } Output Some of THESE letters are Capitals sOME OF these LETTERS ARE cAPITALS The tolower and toupper routines: Are dependent on the LC_CTYPE category of the current locale (tolower calls isupper and toupper calls islower). Convert c if c represents a convertible letter of the appropriate case in the current locale and the opposite case exists for that locale. Otherwise, c is unchanged. The _tolower and _toupper routines: Are locale-independent, much faster versions of tolower and toupper. Can be used only when isascii(c) and either isupper(c) or islower(c), respectively, are true. Have undefined results if c is not an ASCII letter of the appropriate case for converting. The towlower and towupper functions return a converted copy of c if and only if both of the following conditions are true. Otherwise, c is unchanged. c is a wide character of the appropriate case (that is, for which iswupper or iswlower, respectively, is true). There is a corresponding wide character of the target case (that is, for which iswlower or iswupper, respectively, is true).