C / C++ / MFC

FirstPrevNext

Re: How do I get the size of a character array of unspecified size? BlackSmith2-Sep-02 6:39 BlackSmith 2-Sep-02 6:39  The only reason you get 4 (4 bytes) for sizeof (cArray1) is that sizeof actually measures the size of the cArray1, which is a pointer. And as you probably know.... a size of a pointer is 4 bytes (in your compiler anyway...). char *cArray1 = new char[]; //very bad idea! No array size specified. instead, use fixed sized buffer: char cArray1[ARR_SIZE]; This one you can measure: size_t iArraySize = sizeof (cArray1)/sizeof(*cArray1); --BlackSmith-- /*The roof is on fire, we don't need no water, let the MF burn*/. BHG. Re: How do I get the size of a character array of unspecified size? David Z2-Sep-02 11:41 David Z 2-Sep-02 11:41  Ok, I really feel dumb now hehe. I was out of code for a while so I totally overlooked that fact about the operator referring to the pointer. Thanks for the help. I just used strlen and it works fine. Thanks for all the help! Re: How do I get the size of a character array of unspecified size? aritosteles2-Sep-02 18:11 aritosteles 2-Sep-02 18:11  Well... Your array is actually a pointer, so the function sizeof() will always return 4 because that's the size of a pointer. Getting the number of elements in an array is a different thing. Now, I think you should do this some other way. First of all, why would you want to give the user unlimited input length? Just specify a limit and save yourself a headache. Second, maybe it could help to know the length of the array before allocating any memory... but, well, what is it you want to do? Aritosteles VS.NET VC7 generated code, where is it? TigerNinja_2-Sep-02 5:18 TigerNinja_ 2-Sep-02 5:18  Hi all, If I use VS.NET to create a dialog application and say I add a ListCtrl with the designer and set the style to REPORT. So where is this information stored, does the designer generate code? For example I would look for some code in my project containing LVS_REPORT: m_myListCtrl.Create(<br /> WS_CHILD|WS_VISIBLE|WS_BORDER|LVS_REPORT,<br /> CRect(10,10,400,200), pParentWnd, 1); but that code does not exist in my project! Thanks in advance. Soliant | email   "The whole of science is nothing more than a refinement of everyday thinking." -Albert E. Re: VS.NET VC7 generated code, where is it? Tomasz Sowinski2-Sep-02 5:42 Tomasz Sowinski 2-Sep-02 5:42  There's no generated code. The dialog layout is defined by so-called 'dialog template' stored in program resources. When you invoke dialog box, Win32 API (not MFC) creates the dialog box and populates it with controls. The code you'll see in MFC app is responsible for creating CWnd-derived objects mapped to their Win32 API counterparts (HWNDs). Look in DoDataExchange for this. Tomasz Sowinski -- http://www.shooltz.com ** Putt knot yore thrust inn spel chequers. ** Re: VS.NET VC7 generated code, where is it? shokisingh2-Sep-02 6:11 shokisingh 2-Sep-02 6:11  if u want to just change the style do this: m_cListCtrl.ModifyStyle(0, LVS_REPORT); in the constuctor or initdialog();: Ashok Singh <west end="" india=""> why does this code fail? Brakanjan2-Sep-02 4:44 Brakanjan 2-Sep-02 4:44  Hi another question why don't the following code compile? extern CFile cfile; void *data; CFile::Open(m_Pathname1,modeRead); data = cfile.Read(0,cfile.GetLength()); i get the error: error C2440: '=' : cannot convert from 'unsigned int' to 'void *' Conversion from integral type to pointer type requires einterpret_cast, C-style cast or function-style cast (BTW, what does extern do! Otherwise CFile::Read(etc) also works) thanks Re: why does this code fail? Martin Ziacek2-Sep-02 4:49 Martin Ziacek 2-Sep-02 4:49  extern CFile cfile; CFile::Open(m_Pathname1,modeRead); DWORD dwFileLength = cfile.GetLength(); BYTE *data = new BYTE[dwFileLength]; DWORD dwBytesRed = cfile.Read(data,dwFileLength); Martin -------------------------------------------- C'mon we all know computers are experimental devices and should only be used for playing games. Using them for alternative stuff like business, is clearly not using them for what they are intended. Colin Davies Re: why does this code fail? Brakanjan2-Sep-02 4:59 Brakanjan 2-Sep-02 4:59  tx, this works what does BYTE *data = new BYTE[dwFileLength] do? Re: why does this code fail? Martin Ziacek2-Sep-02 5:16 Martin Ziacek 2-Sep-02 5:16  It allocates memory to hold data from the file. When you will finish using it, then you have to free that memory with: delete [] data; I think you have to read little bit more about C++. Martin -------------------------------------------- C'mon we all know computers are experimental devices and should only be used for playing games. Using them for alternative stuff like business, is clearly not using them for what they are intended. Colin Davies Re: why does this code fail? Brakanjan2-Sep-02 5:30 Brakanjan 2-Sep-02 5:30  ok hero Re: why does this code fail? Martin Ziacek2-Sep-02 5:33 Martin Ziacek 2-Sep-02 5:33  Jenny2 wrote: ok hero Martin -------------------------------------------- C'mon we all know computers are experimental devices and should only be used for playing games. Using them for alternative stuff like business, is clearly not using them for what they are intended. Colin Davies missing storage-class or type specifiers error Paul Silvernail2-Sep-02 4:29 Paul Silvernail 2-Sep-02 4:29  I am trying to write two classes that work togeather. One is a color storage class (CSoilColor) and a lookup table class (CColorChart). When I added a member variable to CSoilColor to hold a pointer to a CColorChart object, the compiler choked. Each header file has an include to each other so they should recognize each other, but from the error they apparently do not. Even though the comiler chokes, the development environment recognizes the CColorChart member variable because it allows me access to the CColorChart's members in the CSoilColor's cpp file. Here are the class definitions: #include "SoilColor.h" class CColorChart { public: bool IsValidColor(int nHue, int nValue, int nChroma); bool GetHue(int nHueID, CString& sHueName); bool GetRGBcolor(CSoilColor SC, COLORREF* RGBcolor); void InitChart(); bool GetColorName(int nHue, int nValue, int Chroma, CString& sColorName); CColorChart(); virtual ~CColorChart(); private: CString Hue[nMAXHUES]; COLORCHART Chart[nMAXHUES][nMAXVALUES][nMAXCHROMAS]; }; ===================================================== #include "ColorChart.h" class CSoilColor { public: CSoilColor(); virtual ~CSoilColor(); int GetChroma(); int GetValue(); int GetHue(); COLORREF GetRGBcolor(); bool SetColor(int nHue, int nValue, int nChroma); private: CColorChart* m_pColorChart; //ERROR HERE int m_nHue; int m_nValue; int m_nChroma; }; I think it is probably a simple error, but I am going crazy trying to find it! If anyone has Ideas, please let me know. Thank You. Re: missing storage-class or type specifiers error Tomasz Sowinski2-Sep-02 4:34 Tomasz Sowinski 2-Sep-02 4:34  Use forward declaration instead of #include: class CColorChart; class CSoilColor { ... CColorChar *m_pColorChart; }; Tomasz Sowinski -- http://www.shooltz.com ** Putt knot yore thrust inn spel chequers. ** Re: missing storage-class or type specifiers error Paul Silvernail2-Sep-02 4:43 Paul Silvernail 2-Sep-02 4:43  Now that you mention it I did know that at one point. Thank you very much. No list? Brakanjan2-Sep-02 4:17 Brakanjan 2-Sep-02 4:17  hi if i work in VC for a while, i am unable to access the toolbar list that appears whenever you type something like CString p. is it lack of memory? If i restart my PC it works again... tx Re: No list? benjymous2-Sep-02 5:28 benjymous 2-Sep-02 5:28  Simple answer: VC is screwy, and has a habit of doing that just to annoy you usually it'll stop working if there is a syntax error somewhere in your code. Visual Assist (http://www.wholetomato.com/[^]) is a handy Visual Studio addin that fixes lots of these problems -- Help me! I'm turning into a grapefruit! Re: No list? Martin Ziacek2-Sep-02 5:35 Martin Ziacek 2-Sep-02 5:35  benjymous wrote: http://www.wholetomato.com Where does that obsession from different kind of fruits and vegetables come from? Martin -------------------------------------------- C'mon we all know computers are experimental devices and should only be used for playing games. Using them for alternative stuff like business, is clearly not using them for what they are intended. Colin Davies Re: No list? benjymous2-Sep-02 6:48 benjymous 2-Sep-02 6:48  The phrase "Help me! I'm turning into a grapefruit!" was something utterly non-sensical that I picked up the top of my head to go as the text to a scrolly screensaver on my University Linux account. It drew lots of amusement from people who saw it, so it ended up as my email sig as well (and eventually when I came to create a decent website for myself, I thought up the name "grapefruitopia" as it rolls off the tongue nicely, is pretty bizarre, but easy to remember.) -- Help me! I'm turning into a grapefruit! Re: No list? Michael Dunn2-Sep-02 8:20 Michael Dunn 2-Sep-02 8:20  When Intellisense stops working, it's usually due to a syntax error earlier in the function. However, I have seen it just stop showing the popup list (the VC status bar indicates that Intellisense is otherwise operating fine), and in that case just close & restart VC. --Mike-- Just released - RightClick-Encrypt v1.4 - Adds fast & easy file encryption to Explorer My really out-of-date homepage Sonork-100.19012 Acid_Helm Re: No list? Max Santos2-Sep-02 8:21 Max Santos 2-Sep-02 8:21  Do you know why is that every time that i use this code the intelisense stops working. (the code work just fine) rs->Open(_variant_t(sql), conn.GetInterfacePtr(), adOpenDynamic, adLockOptimistic,adCmdText); Casa.Sapo.pt I need to export data in an Excel document Anonymous2-Sep-02 3:52 Anonymous 2-Sep-02 3:52  I need to develop an application that performs a query on a database and stores the query output in an Excel document. How can I develop the Excel document management (file creation and data storage) ? Thanks a lot Re: I need to export data in an Excel document Carlos Antollini2-Sep-02 4:28 Carlos Antollini 2-Sep-02 4:28  You need to use Ole Automation.... Best Regards Carlos Antollini. Sonork ID 100.10529 cantollini Re: I need to export data in an Excel document Stephane Rodriguez.2-Sep-02 6:01 Stephane Rodriguez. 2-Sep-02 6:01  Use DAO, ODBC (.csv, .xls) Or export to the Excel xml file format (you'll get the reference with this key search on MSDN : "Microsoft Office Drawing File Format". Using xml allows you to create charts or pivot tables as well. And if you need the .xls format itself, yes the simplest way to do it is through Automation, at least if you are running Windows. Final point, you may buy a finished product (softartisan). Or crack the binary file format. And I swallow a small raisin. Re: I need to export data in an Excel document Pavel Klocek2-Sep-02 11:17 Pavel Klocek 2-Sep-02 11:17  See: http://www.codeproject.com/useritems/excelfeed.asp http://www.codeproject.com/database/excel_odbc_write.asp http://www.codeproject.com/database/cspreadsheet.asp Pavel Sonork 100.15206

Last Visit: 31-Dec-99 18:00     Last Update: 9-May-24 14:41 Refresh ᐊ Prev1...16287162881628916290162911629216293162941629516296 Next ᐅ

General    News    Suggestion    Question    Bug    Answer    Joke    Praise    Rant    Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.