C++: How to declare constant array of pointers of TCHAR
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I need a constant array with pointers to two words - OK, CANCEL. I tried: const TCHAR Texts[2][7] = {L"OK", L"Cancel"}; It works fine, but I want to remove [7] and put [] instead, so when I change the text, I don't need to calculate the largest possible size. Also I want to have pointers to this words ...
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I need a constant array with pointers to two words - OK, CANCEL. I tried: const TCHAR Texts[2][7] = {L"OK", L"Cancel"}; It works fine, but I want to remove [7] and put [] instead, so when I change the text, I don't need to calculate the largest possible size. Also I want to have pointers to this words ...
first of all, you're making a type mistake. if you're prepending the strings with a
**L**, then you must use WCHAR. if you still want to continue with TCHAR, then L is not what you're after. You must use**_T()**around the string. this being said, why don't you just do this :const TCHAR* Texts[2] = { _T("OK"), _T("Cancel") };
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first of all, you're making a type mistake. if you're prepending the strings with a
**L**, then you must use WCHAR. if you still want to continue with TCHAR, then L is not what you're after. You must use**_T()**around the string. this being said, why don't you just do this :const TCHAR* Texts[2] = { _T("OK"), _T("Cancel") };
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Than you very much!!! It worked !!! Actually I'm compiling for WM5.0, and TCHAR is WCHAR by default, so L is ok. Is there a place when I can read for the foundation of C++?? I don't know the difference of TCHAR* xx and TCHAR *XX
akirilov wrote:
I don't know the difference of TCHAR* xx and TCHAR *XX
actually, this is just a C++ language stuff.
FOO* XXhas absolutely no difference withFOO *XX. it's just a matter of taste when declaring a variable... TCHAR however is part of the MFC, and is declared like the following IIRC:#if defined(UNICODE) || defined(_UNICODE)
#define TCHAR WCHAR
#else
#define TCHAR char
#endifOn the same, _T() is defined like this:
#if defined(UNICODE) || defined(_UNICODE)
#define _T(x) L##x
#else
#define x
#endif[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]
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akirilov wrote:
I don't know the difference of TCHAR* xx and TCHAR *XX
actually, this is just a C++ language stuff.
FOO* XXhas absolutely no difference withFOO *XX. it's just a matter of taste when declaring a variable... TCHAR however is part of the MFC, and is declared like the following IIRC:#if defined(UNICODE) || defined(_UNICODE)
#define TCHAR WCHAR
#else
#define TCHAR char
#endifOn the same, _T() is defined like this:
#if defined(UNICODE) || defined(_UNICODE)
#define _T(x) L##x
#else
#define x
#endif[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]
I know that _T(xx) is better (it works for ANSI and Unicode) then Lxx , but when I need a constant string it is easier to put just L (because for WM you almost always work with Unicode). P.S. If you know a place on Internet, where I can learn some basic C++ conception this will be great.
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I know that _T(xx) is better (it works for ANSI and Unicode) then Lxx , but when I need a constant string it is easier to put just L (because for WM you almost always work with Unicode). P.S. If you know a place on Internet, where I can learn some basic C++ conception this will be great.
It is not a question of "one is better than the other". you MUST use _T() with TCHAR and L with WCHAR. the point that UNICODE is defined is not for "WM" at all. it is defined in your project settings, and some might want to build a non unicode version. if your code is well written then, only switching the parameter in the project settings will do. otherwise, you'd have to change every line of code using L to remove it, so that the ANSI build can perform successfully. so be independant of that, and use _T() ;)
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Than you very much!!! It worked !!! Actually I'm compiling for WM5.0, and TCHAR is WCHAR by default, so L is ok. Is there a place when I can read for the foundation of C++?? I don't know the difference of TCHAR* xx and TCHAR *XX
akirilov wrote:
I don't know the difference of TCHAR* xx and TCHAR *XX
xxis a different variable thanXX. Whether you put the space before or after is irrelevant, as the compiler sees tokens rather than spaces."Love people and use things, not love things and use people." - Unknown
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