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Forum: General Programming

Forum devoted to general, non-Qt programming issues.

  1. Sticky Thread Sticky: What are your favourite C++ books?

    Hi everyone! Now I try to fresh up my C++ knowledge and look across by book shelf. I 'm not completely satisfied with the C++ books I have here....

    Posted By eugen
    3 Pages
    1 2 3
    • Replies: 58
    • Views: 11,199
    12th April 2009 15:26 Go to last post
  1. Packing known number of uniform-sized squares into a known rect

    Hi, A known number of uniform-sized squares must be packed into a container rectangle (that can but may not be a square) while making optimal use of...

    Posted By momesana
    • Replies: 0
    • Views: 6
    Today 06:59 Go to last post
  2. Lightbulb UML Editors based on Qt

    I was wondering if anyone knows about free/open-source UML editors based on Qt. I only know about Umbrello, which is part of KDE. A list of UML...

    Posted By npclaudiu
    open source, uml
    • Replies: 0
    • Views: 27
    Yesterday 00:59 Go to last post
  3. static class members

    This is probably a noob question, but... When I create a static class member of an object type, for example: class A { static const A fixed =...

    Posted By space_otter
    • Replies: 3
    • Views: 75
    11th March 2010 01:07 Go to last post
  4. function returns QString, usage generates segfault

    I'm creating a function of the form: QString &DNumber::toString() { qDebug() << "DNumber as string"; char * buffer = new char; ...

    Posted By space_otter
    • Replies: 5
    • Views: 89
    8th March 2010 16:54 Go to last post
  5. Unhappy pig letin generator readout problems

    I writing a pig latin generator. Some times it prints out the english phrase fine, other times it doesn't For instance "i want to have fun prints...

    Posted By Petr_Kropotkin
    • Replies: 3
    • Views: 36
    8th March 2010 11:03 Go to last post
  6. Unhappy string handling problems

    I can;t read my array of strings. I am creating a random sentance generator program. Here is the code I have so far: int main() { char...

    Posted By Petr_Kropotkin
    • Replies: 3
    • Views: 58
    5th March 2010 20:25 Go to last post
  7. automatically complete fields on the form

    Is there any possibility to do the "machine" (or boot or somthing like that) that will automatically complete fields on the form (for example, the...

    Posted By TomASS
    • Replies: 0
    • Views: 33
    4th March 2010 09:19 Go to last post
  8. Strange compile error in subclass

    Hi, I'm using eclipse integration 1.6.1 and Qt 1.6.2. I'm having a problem creating a simple non-Qt class structure. I've created a folder called...

    Posted By space_otter
    error, inheritance, reference, subclass, undefined
    • Replies: 4
    • Views: 88
    4th March 2010 00:26 Go to last post
  9. Question segfault while trying to access QList

    I am a bit stuck on a small project I am working on. It's supposed to access a SugarCRM instance via SOAP. Now I have implemented most of the...

    Posted By Raven24
    • Replies: 1
    • Views: 62
    3rd March 2010 07:53 Go to last post
  10. QSqlRelationalTableModel QDataWidgetMapper

    Hi, Here is my app in general: QTableView data list populated from database, the view is based on QSqlRelationalTableModel. Some columns in...

    Posted By kawoN
    • Replies: 2
    • Views: 73
    2nd March 2010 08:54 Go to last post
  11. Question Emulating Joystick Input in Linux ( C++ )

    Hi everybody, I've been looking everywhere to find help but there seems to be no one trying to do what I want to do. Or maybe it's just too simple...

    Posted By invisible_uli
    emulate, joystick, joystick input, linux, module
    • Replies: 5
    • Views: 183
    28th February 2010 15:52 Go to last post
  12. In spite of #including the header files I get: "... was not declared in this scope"

    Hi, I am writing an application consisting of some files that do inherit from a common base class "Piece". When I try to instantiate an object...

    Posted By momesana
    • Replies: 2
    • Views: 59
    28th February 2010 08:38 Go to last post
  13. Unhappy Recursive min problem

    I am given a matrix and size. const int MAX=50; int min; int mat; int FindMin(int mat,int size) { if (size==0) return 0;

    Posted By Petr_Kropotkin
    • Replies: 1
    • Views: 51
    27th February 2010 20:24 Go to last post
  14. I want to download a piece of file?

    hi every body; i am working on a program that download files from the internet and i want to download these files as fast as possible so i want...

    Posted By mismael85
    • Replies: 1
    • Views: 41
    27th February 2010 16:35 Go to last post
  15. Unhappy conversion problem

    I do a turtle graphics program and having and a hell of time with it. Here is the code that gives me problems void checkpos(char cmd) { ...

    Posted By Petr_Kropotkin
    • Replies: 4
    • Views: 90
    27th February 2010 01:46 Go to last post
  16. RAW_SOCKET in QT

    how to create Raw_socket using qt?

    Posted By XavierQT
    • Replies: 3
    • Views: 79
    20th February 2010 18:03 Go to last post
  17. Inter App Communication

    I have a Qt application and A Borland application but i want to establish a link between the two. Link so that i can send some info back and forth. ...

    Posted By baray98
    • Replies: 13
    • Views: 229
    13th February 2010 19:16 Go to last post
  18. Creating Column numbering like in Excecl i.e. A...Z then AA ... ZZ and so forth

    Hi, I wanted to have a numbering scheme for columns like the one provided by Office calculation programs. My approach so far is this: ...

    Posted By momesana
    • Replies: 9
    • Views: 221
    13th February 2010 12:17 Go to last post
  19. Question i am a student in b.tech and need help.

    a code to design clock in c++ The clock should be bright during day hours(6:30AM to 6:30PM) and dark and glowing during night hours(6:31PM to...

    Posted By bijalvadher
    • Replies: 4
    • Views: 120
    12th February 2010 17:27 Go to last post
  20. Display images and move them

    Hello, I am developing a checkers game for Mac and Win. I am displaying each piece in a QLabel in the following way QLabel *piece = new...

    Posted By AL
    • Replies: 2
    • Views: 72
    11th February 2010 12:15 Go to last post
  21. how to get the current system time ?

    Using standard C++ functions how can i get the current time from my system since noon? I tried: time_t hours; hours= time(&hours);...

    Posted By Petr_Kropotkin
    • Replies: 4
    • Views: 93
    10th February 2010 19:21 Go to last post
  22. Question can any1 please help me

    a clock in c++ The clock should beep if the system is idle for 30 mins, with beep disable option, also if the system is idle for 30 mins the clock...

    Posted By bijalvadher
    • Replies: 2
    • Views: 77
    10th February 2010 14:03 Go to last post
  23. how to do this ?

    I am trying to write a program that does this: * ** *** **** ***** ****** ******* I have most of...

    Posted By Petr_Kropotkin
    • Replies: 10
    • Views: 145
    10th February 2010 07:15 Go to last post
  24. Windows programming in Qt (serial communication)

    Hello! I want to write a Qt application that will use serial communication on WinXP hardware. Qt is cross-platform while serial communication...

    Posted By bnilsson
    • Replies: 17
    • Views: 2,442
    9th February 2010 19:17 Go to last post
  25. cannot find lqtopia2

    Hi all, could somebody help me? I try to compiling with arm-qtopia and next error occurs: " /usr/bin/ld: cannot find -lqtopia2 " What this mean...

    Posted By antsu
    • Replies: 0
    • Views: 36
    9th February 2010 18:30 Go to last post
  26. QAudioInput and QtcpSocket help!!!

    I want to capture data with QAudioInput, send them by QTcpSocket for been played in the receiver. How can I do this?:confused:

    Posted By XavierQT
    • Replies: 0
    • Views: 64
    6th February 2010 16:49 Go to last post
  27. Ho to interpret this?

    Hi, I'm tryin to use a OpenCV example that uses this code line: const CvScalar colors = \cvdefCpp{0,0,255}},{{0,255,0}}, ...

    Posted By ^NyAw^
    • Replies: 3
    • Views: 97
    4th February 2010 17:24 Go to last post
  28. need help in getting a logic to work

    Hi all, I have this problem which I have been pondering and can't seem to find a solution to it. Therefore, I need some expertise in programming...

    Posted By eva2002
    • Replies: 3
    • Views: 115
    29th January 2010 09:30 Go to last post
  29. Question float vs double

    A possibly stupid question, but I don't understand. Take this piece of code: float poo1( 0.1 ); poo1 = poo1 - 0.1; double poo2( 0.1 );...

    Posted By Royceybaby
    • Replies: 4
    • Views: 133
    27th January 2010 22:55 Go to last post
  30. Erratic performance of IO operations in Qt4 program

    Hi, Somewhere in a qt4 program, I launch a thread, that will do some IO operations in a file... I'm trying to time this operation... QTime t;...

    Posted By jcox23
    • Replies: 2
    • Views: 101
    26th January 2010 18:33 Go to last post

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