Can someone tell me the library call that converts strings to lower case or
retrns a new string that is lower case of the original, thanks
im using <string>
David
22  6443 
Or perhaps even better a compare that ignores case.
thanks
"DJ" <ch*****@earthl ink.net> wrote in message
news:vV******** ********@newsre ad3.news.pas.ea rthlink.net... Can someone tell me the library call that converts strings to lower case
or retrns a new string that is lower case of the original, thanks
im using <string>
David
DJ wrote:
Or perhaps even better a compare that ignores case.
thanks
"DJ" <ch*****@earthl ink.net> wrote in message
news:vV******** ********@newsre ad3.news.pas.ea rthlink.net... Can someone tell me the library call that converts strings to lower case
or retrns a new string that is lower case of the original, thanks
im using <string>
David
The discussion regarding the (international) caveats of lower/upper case and
case-insensitive *word* comparisons comes up monthly. Check the Google Groups
archives for more blather than you want to read, as well as a couple of
(somewhat) portable/internationaliz ed solutions.
Julie wrote: The discussion regarding the (international) caveats of lower/upper case and
case-insensitive *word* comparisons comes up monthly. Check the Google Groups
archives for more blather than you want to read, as well as a couple of
(somewhat) portable/internationaliz ed solutions.
I am confused by your terminology "internatio nal" here. What do you mean?
--
Ioannis Vranos http://www23.brinkster.com/noicys
DJ wrote: Can someone tell me the library call that converts strings to lower case or
retrns a new string that is lower case of the original, thanks
im using <string>
David
Check std::toupper() and std::tolower() functions of <cctype>.
--
Ioannis Vranos http://www23.brinkster.com/noicys
Ioannis Vranos wrote: Julie wrote:
The discussion regarding the (international) caveats of lower/upper case
and case-insensitive *word* comparisons comes up monthly.
Check the Google Groups archives for more blather than you want to read,
as well as a couple of (somewhat) portable/internationaliz ed solutions.
I am confused by your terminology "internatio nal" here. What do you mean?
One example is the german character ß that doesn't have a single uppercase
equivalent. 'Fuß' would need to compare equal to 'FUSS'.
Rolf Magnus wrote: One example is the german character ß that doesn't have a single uppercase
equivalent. 'Fuß' would need to compare equal to 'FUSS'.
This is not the case here, since we are talking about std::string.
About multilingual characters, one should use wchar_t, std::wstring and
the std::towlower() , std::towupper() of <cwctype>, all guaranteed to work.
C++98:
"Type wchar_t is a distinct type whose values can represent distinct
codes for all members of the largest extended character set specified
among the supported locales (22.1.1). Type wchar_t shall have the same
size, signedness, and alignment requirements (3.9) as one of the other
integral types, called its underlying type."
--
Ioannis Vranos http://www23.brinkster.com/noicys
Ioannis Vranos wrote: Rolf Magnus wrote:
One example is the german character ß that doesn't have a single
uppercase equivalent. 'Fuß' would need to compare equal to 'FUSS'.
This is not the case here, since we are talking about std::string.
About multilingual characters, one should use wchar_t, std::wstring and
the std::towlower() , std::towupper() of <cwctype>, all guaranteed to work.
How do those handle such a conversion? The main point here is that the
number of characters in the uppercase version and in the lowercase version
are not equal. Character-based toupper and tolower can't handle that.
Rolf Magnus wrote: How do those handle such a conversion? The main point here is that the
number of characters in the uppercase version and in the lowercase version
are not equal. Character-based toupper and tolower can't handle that.
However they work for Greek and English and I assume all languages with
one to one, lower-case to upper-case correspondence, so I guess it is
for such languages and up to the programmer to take this decision.
--
Ioannis Vranos http://www23.brinkster.com/noicys
Ioannis Vranos wrote:
Julie wrote:
The discussion regarding the (international) caveats of lower/upper case and
case-insensitive *word* comparisons comes up monthly. Check the Google Groups
archives for more blather than you want to read, as well as a couple of
(somewhat) portable/internationaliz ed solutions.
I am confused by your terminology "internatio nal" here. What do you mean?
I mean that there are languages that apparently do not have a 1-1
correspondence between upper and lower case words (and characters).
For English, u/l case comparisons are trivial. For German, there are issues.
This is what I mean about 'international' -- if the OP is writing a
locale-independent application (assumed to be the case unless indicated
otherwise), they will have to contend w/ such 'international' issues. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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