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  • Does putting types/functions inside namespace make compiler's parsing work easy?

    - by iammilind
    Retaining the names inside namespace will make compiler work less stressful!? For example: // test.cpp #include</*iostream,vector,string,map*/> class vec { /* ... */ }; Take 2 scenarios of main(): // scenario-1 using namespace std; // comment this line for scenario-2 int main () { vec obj; } For scenario-1 where using namespace std;, several type names from namespace std will come into global scope. Thus compiler will have to check against vec if any of the type is colliding with it. If it does then generate error. In scenario-2 where there is no using namespace, compiler just have to check vec with std, because that's the only symbol in global scope. I am interested to know that, shouldn't it make the compiler little faster ?

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  • Should I drawing directly on CCLayer or CCSprite?

    - by einverne
    Now I am a little confused in my cocos2d-x cpp project. I want to draw lines with user's finger touch. Following the screenshot of a CCScene: In the screen, there are two squares. I want show an animation in the first square and let the second one draw lines with user touch. Now these two squares are CCSprite. And I can draw dots in the second one on the CCLayer. But I am little confused that I should draw lines on the Sprite or on the Layer. Or are there other ways to organize the code?

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  • have a problem with my 2nd quad bottom left vertex position ? weirdd

    - by RubyKing
    Hey all I'm just trying to add another quad to my frustum and when doing so I get this weird little error. What happens is the bottom left side of my quad seems to stick to the center point for no apparent reason that I can think of and or figure out from. has anyone else experienced this issue and knows a solution or would you like more information please do ask. here is my main.cpp file http://pastebin.com/g9q8uAsd I think its because of 2 different quad vertex array data is in the same array.

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  • "main.exe" Has Crashed Error [migrated]

    - by JRuxDev
    I have a programming project due today and I am having a simple error. The project is to create a skeleton of a basic menu. The new command just counts from 1 to an integer entered by the user. Before I continue, I have posted a link to the pastebin that holds my .cpp file: http://pastebin.com/pAi9EiEi The rest of the program runs and works. However, the error is simple. It is crashing as soon as I type in any of the commands. After running error checks, I have found the error is not the while but the if statements. The error is on the lines similar to this: if (stricmp(strstr(newCommand, cmd2), newCommand) == 0) What this line is supposed to do, is copy what is in cmd2 and put it in newCommand then comparing it without caps sensitivity to: char newCommand[] = "new"; Thank you, Rux

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  • STLport5.2.1 question in VC6.0

    - by vincent.chen
    hi all, today i install the STLPort5.2.1 to my VC6.0 and i test it out, it's okay in the console project, but it issue following question in the MFC project: Compiling... testMFCDlg.cpp d:\sw\vc6\vc98\stlport-5.2.1\stlport\errno.h(55) : fatal error C1189: #error : errno has been defined before inclusion of errno.h header. Error executing cl.exe. how could i avoid this question correctly, help , friends. best wishes, vincent.chen

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  • undefined reference to `main' collect2: ld returned 1 exit status

    - by sobingt
    I am working on this QT project and i am making test cases for my project. Here is a small test case #include <QApplication> #include <QPalette> #include <QPixmap> #include <QSplashScreen> #include <qthread.h> #define BOOST_TEST_MAIN #include <boost/test/unit_test.hpp> #include <boost/make_shared.hpp> # include <boost/thread.hpp> #include "MainWindow.h" namespace { const std::string dbname = "Project.db"; struct SongFixture { SongFixture(const std::string &fixturePath) { // Create the Master file Master::creator(); // Create/open file std::pair<int, SQLiteDbPtr> result = open( dbname, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, 0); if (result.first != SQLITE_OK) { throw SQLiteError(result.first, sqlite3_errmsg(result.second.get())); } SQLiteDbPtr &spDb = result.second; // Execute all the SQL from the fixture file execSQLFromFile(spDb, fixturePath); } }; std::auto_ptr<SongFixture> pf; } class I : public QThread { public: static void sleep(unsigned long secs) { QThread::sleep(secs); } }; void free_test_function() { BOOST_CHECK(true ); } test_suite* init_unit_test_suite(int argc, char *argv[]) { // Create a fixture for the peer: // Manage fixture creation manually instead of using // BOOST_FIXTURE_TEST_CASE because the fixture depends on runtime args. std::ostringstream fixturePathSS; fixturePathSS << PROJECT_DIR << "/test/songs_fixture.sql"; std::string fixturePath = fixturePathSS.str(); pf.reset(new SongFixture(fixturePath)); QApplication app(argc, argv); MainWindow window("artists"); window.show(); framework::master_test_suite().add( BOOST_TEST_CASE( &free_test_function )); return app.exec(); } Well i am getting any error /usr/lib/gcc/x86_64-linux-gnu/4.6.1/../../../x86_64-linux-gnu/crt1.o: In function _start': (.text+0x20): undefined reference tomain' collect2: ld returned 1 exit status pls help me you have a lead..thankz I tired adding #define BOOST_TEST_MAIN then i get ../test/UI/main.cpp: In function ‘boost::unit_test::test_suite* init_unit_test_suite(int, char**)’: ../test/UI/main.cpp:75:31: error: redefinition of ‘boost::unit_test::test_suite* init_unit_test_suite(int, char**)’ /usr/local/include/boost/test/unit_test_suite.hpp:223:1: error: ‘boost::unit_test::test_suite* init_unit_test_suite(int, char**)’ previously defined here Well the program is working in Windows but in Linux the above mention problem is observed

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  • Java CORBA Client Disconnects When Event Fires

    - by Benny
    I have built a Java CORBA application that subscribes to an event server. The application narrows and logs on just fine, but as soon as an event is sent to the client, it breaks with the error below. Please advise. 2010/04/25!13.00.00!E00555!enserver!EventServiceIF_i.cpp!655!PID(7390)!enserver - e._info=system exception, ID 'IDL:omg.org/CORBA/TRANSIENT:1.0' TAO exception, minor code = 54410093 (invocation connect failed; ECONNRESET), completed = NO

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  • poco Lib dosnt compile in vs express 9

    - by user63898
    Hello all im trying to compile the poco lib in vs express 2008 but im keep getting this error : poco-1.3.6p2\foundation\src\eventlogchannel.cpp(40) : fatal error C1083: Cannot open include file: 'pocomsg.h': No such file or directory no i have the mc.exe in my sdk and all the paths in the IDE are seams to be right and nada . does any one have experience with this lib ?

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  • Compiling libnoise on OSX 10.6

    - by grrussel
    Has anyone compiled, or know of a pre-compiled, libnoise for MacOS X 10.6? It does not compile out of the box here due to a libtool issue. libtool --mode=compile g++ -c ../src/latlon.cpp -o ../src/latlon.o libtool: unknown option character `-' in: --mode=compile

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  • error C2440: 'initializing' : cannot convert from 'const wchar_t [9]' to 'LPCSTR'

    - by numerical25
    When I add the following to my code. // Define the input layout D3D10_INPUT_ELEMENT_DESC layout[] = { { L"POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 }, }; UINT numElements = sizeof(layout)/sizeof(layout[0]); I get the following error 1>c:\users\numerical25\desktop\intro todirectx\msdntutorials\tutorial0\tutorial\tutorial\main.cpp(43) : error C2440: 'initializing' : cannot convert from 'const wchar_t [9]' to 'LPCSTR' The error points straight to that line of code. if i remove the code, everything compiles correctly.

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  • How to set up a Hudson server to run cppunit tests

    - by kyue
    Hello, I'm having problems setting up my Hudson server to run cpp unit tests so I can output an .xml file. I tried searching the web for some more straight forward instructions on how to set this up but still don't understand how to. It sounds like I need to set up ant to run...but how?? I'm currently running Hudson ver 1.352. Any suggestions will be greatly appreciated. Kat

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  • how to send classes defined in .proto (protocol-buffers) over a socket

    - by make
    Hi, I am trying to send a proto over a socket, but i am getting segmentation error. Could someone please help and tell me what is wrong with this example? file.proto message data{ required string x1 = 1; required uint32 x2 = 2; required float x3 = 3; } client.cpp ... // class defined in proto data data_snd; data data_rec; char *y1 = "operation1"; uint32_t y2 = 123 ; float y3 = 3.14; // assigning data to send() data_snd.set_x1(y1); data_snd.set_x2(y2); data_snd.set_x3(y3); //sending data to the server if (send(socket, &data_snd, sizeof(data_snd), 0) < 0) { cerr << "send() failed" ; exit(1); } //receiving data from the client if (recv(socket, &data_rec, sizeof(data_rec), 0) < 0) { cerr << "recv() failed"; exit(1); } //printing received data cout << data_rec.x1() << "\n"; cout << data_rec.x2() << "\n"; cout << data_rec.x3() << "\n"; ... server.cpp ... //receiving data from the client if (recv(socket, &data_rec, sizeof(data_rec), 0) < 0) { cerr << "recv() failed"; exit(1); } //printing received data cout << data_rec.x1() << "\n"; cout << data_rec.x2() << "\n"; cout << data_rec.x3() << "\n"; // assigning data to send() data_snd.set_x1(data_rec.x1()); data_snd.set_x2(data_rec.x2()); data_snd.set_x3(data_rec.x3()); //sending data to the server if (send(socket, &data_snd, sizeof(data_snd), 0) < 0) { cerr << "send() failed" ; exit(1); } ... Thanks for help and replies-

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  • problem with template inheritance

    - by amiad
    I'm trying to understand whay i get an error on this code: (the error is under g++ unix compiler. VS is compiling OK) template<class T> class A { public: T t; public: A(const T& t1) : t(t1) {} virtual void Print() const { cout<<*this<<endl;} friend ostream& operator<<(ostream& out, const A<T>& a) { out<<"I'm "<<typeid(a).name()<<endl; out<<"I hold "<<typeid(a.t).name()<<endl; out<<"The inner value is: "<<a.t<<endl; return out; } }; template<class T> class B : public A<T> { public: B(const T& t1) : A<T>(t1) {} const T& get() const { return t; } }; int main() { A<int> a(9); a.Print(); B<A<int> > b(a); b.Print(); (b.get()).Print(); return 0; } This code is giving the following error: main.cpp: In member function 'const T& B::get() const': main.cpp:23: error: 't' was not declared in this scope It did compiled when i changed the code of B to this: template<class T> class B : public A<T> { public: B(const T& t1) : A<T>(t1) {} const T& get() const { return A<T>::t; } }; I just cant understand what is the problem with the first code... It doesn't make sense that i really need to write "A::" every time...

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  • OpenCV 2.4.2 on Matlab 2012b (Windows 7)

    - by Maik Xhani
    Hello i am trying to use OpenCV 2.4.2 in Matlab 2012b. I have tried those actions: downloaded OpenCV 2.4.2 used CMake on opencv folder using Visual Studio 10 and Visual Studio 10 Win64 compiler built Debug and Release version with Visual Studio first without any other option and then with D_SCL_SECURE=1 specified for every project changed Matlab's mexopts.bat and adding new lines refering to library and include (see bottom for mexopts.bat content) with Visual Studio 10 compiler tried to compile a simple file with a OpenCV library inclusion and all goes well. try to compile something that actually uses OpenCV commands and get errors. I used openmexopencv library and when tried to compile something i get this error cv.make mex -largeArrayDims -D_SECURE_SCL=1 -Iinclude -I"C:\OpenCV\build\include" -L"C:\OpenCV\build\x64\vc10\lib" -lopencv_calib3d242 -lopencv_contrib242 -lopencv_core242 -lopencv_features2d242 -lopencv_flann242 -lopencv_gpu242 -lopencv_haartraining_engine -lopencv_highgui242 -lopencv_imgproc242 -lopencv_legacy242 -lopencv_ml242 -lopencv_nonfree242 -lopencv_objdetect242 -lopencv_photo242 -lopencv_stitching242 -lopencv_ts242 -lopencv_video242 -lopencv_videostab242 src+cv\CamShift.cpp lib\MxArray.obj -output +cv\CamShift CamShift.cpp C:\Program Files\MATLAB\R2012b\extern\include\tmwtypes.h(821) : warning C4091: 'typedef ': ignorato a sinistra di 'wchar_t' quando non si dichiara alcuna variabile c:\program files\matlab\r2012b\extern\include\matrix.h(319) : error C4430: identificatore di tipo mancante, verr… utilizzato int. Nota: default-int non Š pi— supportato in C++ the content of my mexopts.bat is @echo off rem MSVC100OPTS.BAT rem rem Compile and link options used for building MEX-files rem using the Microsoft Visual C++ compiler version 10.0 rem rem $Revision: 1.1.6.4.2.1 $ $Date: 2012/07/12 13:53:59 $ rem Copyright 2007-2009 The MathWorks, Inc. rem rem StorageVersion: 1.0 rem C++keyFileName: MSVC100OPTS.BAT rem C++keyName: Microsoft Visual C++ 2010 rem C++keyManufacturer: Microsoft rem C++keyVersion: 10.0 rem C++keyLanguage: C++ rem C++keyLinkerName: Microsoft Visual C++ 2010 rem C++keyLinkerVersion: 10.0 rem rem ******************************************************************** rem General parameters rem ******************************************************************** set MATLAB=%MATLAB% set VSINSTALLDIR=c:\Program Files (x86)\Microsoft Visual Studio 10.0 set VCINSTALLDIR=%VSINSTALLDIR%\VC set OPENCVDIR=C:\OpenCV rem In this case, LINKERDIR is being used to specify the location of the SDK set LINKERDIR=c:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\ set PATH=%VCINSTALLDIR%\bin\amd64;%VCINSTALLDIR%\bin;%VCINSTALLDIR%\VCPackages;%VSINSTALLDIR%\Common7\IDE;%VSINSTALLDIR%\Common7\Tools;%LINKERDIR%\bin\x64;%LINKERDIR%\bin;%MATLAB_BIN%;%PATH% set INCLUDE=%OPENCVDIR%\build\include;%VCINSTALLDIR%\INCLUDE;%VCINSTALLDIR%\ATLMFC\INCLUDE;%LINKERDIR%\include;%INCLUDE% set LIB=%OPENCVDIR%\build\x64\vc10\lib;%VCINSTALLDIR%\LIB\amd64;%VCINSTALLDIR%\ATLMFC\LIB\amd64;%LINKERDIR%\lib\x64;%MATLAB%\extern\lib\win64;%LIB% set MW_TARGET_ARCH=win64 rem ******************************************************************** rem Compiler parameters rem ******************************************************************** set COMPILER=cl set COMPFLAGS=/c /GR /W3 /EHs /D_CRT_SECURE_NO_DEPRECATE /D_SCL_SECURE_NO_DEPRECATE /D_SECURE_SCL=0 /DMATLAB_MEX_FILE /nologo /MD set OPTIMFLAGS=/O2 /Oy- /DNDEBUG set DEBUGFLAGS=/Z7 set NAME_OBJECT=/Fo rem ******************************************************************** rem Linker parameters rem ******************************************************************** set LIBLOC=%MATLAB%\extern\lib\win64\microsoft set LINKER=link set LINKFLAGS=/dll /export:%ENTRYPOINT% /LIBPATH:"%LIBLOC%" libmx.lib libmex.lib libmat.lib /MACHINE:X64 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib opencv_calib3d242.lib opencv_contrib242.lib opencv_core242.lib opencv_features2d242.lib opencv_flann242.lib opencv_gpu242.lib opencv_haartraining_engine.lib opencv_imgproc242.lib opencv_highgui242.lib opencv_legacy242.lib opencv_ml242.lib opencv_nonfree242.lib opencv_objdetect242.lib opencv_photo242.lib opencv_stitching242.lib opencv_ts242.lib opencv_video242.lib opencv_videostab242.lib /nologo /manifest /incremental:NO /implib:"%LIB_NAME%.x" /MAP:"%OUTDIR%%MEX_NAME%%MEX_EXT%.map" set LINKOPTIMFLAGS= set LINKDEBUGFLAGS=/debug /PDB:"%OUTDIR%%MEX_NAME%%MEX_EXT%.pdb" set LINK_FILE= set LINK_LIB= set NAME_OUTPUT=/out:"%OUTDIR%%MEX_NAME%%MEX_EXT%" set RSP_FILE_INDICATOR=@ rem ******************************************************************** rem Resource compiler parameters rem ******************************************************************** set RC_COMPILER=rc /fo "%OUTDIR%mexversion.res" set RC_LINKER= set POSTLINK_CMDS=del "%LIB_NAME%.x" "%LIB_NAME%.exp" set POSTLINK_CMDS1=mt -outputresource:"%OUTDIR%%MEX_NAME%%MEX_EXT%;2" -manifest "%OUTDIR%%MEX_NAME%%MEX_EXT%.manifest" set POSTLINK_CMDS2=del "%OUTDIR%%MEX_NAME%%MEX_EXT%.manifest" set POSTLINK_CMDS3=del "%OUTDIR%%MEX_NAME%%MEX_EXT%.map"

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  • Compiling SDL Games on Mac

    - by dejai
    I have a mac and I am trying to compile my projects. The standard on the wiki: g++ sdl.cpp -lSDLmain -lSDL -framework Cocoa does not seem to be working it returns that it cannot find -lSDL and -lSDLmain. Any help would be greatly appreciated.

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  • xcode 3.2 c++: how can i enable a proper code completion?

    - by ufk
    Hiya. I have snow leopard and I'm building a cpp Application with xcode. I would like to be able to get proper code completion with xcode, and by that i mean the following: std::string f; f. just when I type f. i would like to see all the relevant functions to that string class. is it possible in xcode ?

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  • Simple thread-safe non-blocking file logger class in c#

    - by Jason Renlan
    I have a web application, that will log some information to a file. I am looking for a simple thread-safe non-blocking file logger class in c#. I have little experience with threading. I known there are great logging components out there like log4Net, Enterprise Library Logging Block, ELMAH, but I do not want an external dependence for my application. I was thinking about using this queue implementation http://www.codeproject.com/KB/cpp/lockfreeq.aspx

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  • Error compiling Win32 API GUI code with MinGW

    - by Eric Larsen
    Hey guys, this is my first post. I'm just getting started with win32 API programming in C++ and I'm having trouble compiling the winnie tutorial (http://www.relisoft.com/win32/winnie.html) with MinGW. My input and output: C:\Users\Eric\Projects g++ winnie.cpp -o winnie.exe /mingw/lib/libmingw32.a(main.o):main.c:(.text+0xd2): undefined reference to 'WinMain@16' collect2: ld returned 1 exit status Any help would be very much appreciated.

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  • Specialization of template after instantiation?

    - by Onur Cobanoglu
    Hi, My full code is too long, but here is a snippet that will reflect the essence of my problem: class BPCFGParser { public: ... ... class Edge { ... ... }; class ActiveEquivClass { ... ... }; class PassiveEquivClass { ... ... }; struct EqActiveEquivClass { ... ... }; struct EqPassiveEquivClass { ... ... }; unordered_map<ActiveEquivClass, Edge *, hash<ActiveEquivClass>, EqActiveEquivClass> discovered_active_edges; unordered_map<PassiveEquivClass, Edge *, hash<PassiveEquivClass>, EqPassiveEquivClass> discovered_passive_edges; }; namespace std { template <> class hash<BPCFGParser::ActiveEquivClass> { public: size_t operator()(const BPCFGParser::ActiveEquivClass & aec) const { } }; template <> class hash<BPCFGParser::PassiveEquivClass> { public: size_t operator()(const BPCFGParser::PassiveEquivClass & pec) const { } }; } When I compile this code, I get the following errors: In file included from BPCFGParser.cpp:3, from experiments.cpp:2: BPCFGParser.h:408: error: specialization of ‘std::hash<BPCFGParser::ActiveEquivClass>’ after instantiation BPCFGParser.h:408: error: redefinition of ‘class std::hash<BPCFGParser::ActiveEquivClass>’ /usr/include/c++/4.3/tr1_impl/functional_hash.h:44: error: previous definition of ‘class std::hash<BPCFGParser::ActiveEquivClass>’ BPCFGParser.h:445: error: specialization of ‘std::hash<BPCFGParser::PassiveEquivClass>’ after instantiation BPCFGParser.h:445: error: redefinition of ‘class std::hash<BPCFGParser::PassiveEquivClass>’ /usr/include/c++/4.3/tr1_impl/functional_hash.h:44: error: previous definition of ‘class std::hash<BPCFGParser::PassiveEquivClass>’ Now I have to specialize std::hash for these classes (because standard std::hash definition does not include user defined types). When I move these template specializations before the definition of class BPCFGParser, I get a variety of errors for a variety of different things tried, and somewhere (http://www.parashift.com/c++-faq-lite/misc-technical-issues.html) I read that: Whenever you use a class as a template parameter, the declaration of that class must be complete and not simply forward declared. So I'm stuck. I cannot specialize the templates after BPCFGParser definition, I cannot specialize them before BPCFGParser definition, how may I get this working? Thanks in advance, Onur

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  • How to share classes between DLLs

    - by Jamie Hale
    I have an unmanaged Win32 C++ application that uses multiple C++ DLLs. The DLLs each need to use class Foo - definition and implementation. Where do Foo.h and Foo.cpp live so that the DLLs link and don't end up duplicating code in memory? Is this a reasonable thing to do?

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  • qt moc.exe error

    - by kaycee
    i'm using QT Creator 1.3.1 and trying to compile, but get this error... please help me get rid of it mingw32-make[1]: Leaving directory `C:/Documents and Settings/eyalk/My Documents/My QT Projects/XML' mingw32-make: Leaving directory `C:/Documents and Settings/eyalk/My Documents/My QT Projects/XML' 'C:/Qt/2010.02.1/qt/bin\moc.exe' is not recognized as an internal or external command, operable program or batch file. mingw32-make[1]: *** [debug/moc_mainwindow.cpp] Error 1 mingw32-make: *** [debug] Error 2 Exited with code 2. Error while building project XML When executing build step 'Make'

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  • What does template<class key, class type> mean before a method in C++?

    - by zengr
    Hi, I have got this code and I am trying to understand the convention followed, all the method defined in the .cpp file have template<class KeyType, class DataType> written before them. What does that mean? Example: //Constructor template<class key, class type> MyOperation<key, type>::MyOperation() { //method implementation } //A method template<class key, class type> MyOperation<key, type>::otherOperation() { //method implementation } Thanks

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  • C++: Error in Xcode; "Graph::Coordinate::Coordinate()", referenced from: ...

    - by Alexandstein
    In a program I am writing, I wrote for two classes (Coordinate, and Graph), with one of them taking the other as constructor arguments. When I try to compile it I get the following error for Graph.cpp: Undefined symbols: "Graph::Coordinate::Coordinate(double)", referenced from: Graph::Graph() in Graph.o Graph::Graph() in Graph.o "Graph::Coordinate::Coordinate()", referenced from: Graph::Graph(Graph::Coordinate, Graph::Coordinate, Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate, Graph::Coordinate, Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate, Graph::Coordinate, Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate, Graph::Coordinate, Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate, Graph::Coordinate, Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate, Graph::Coordinate, Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate, Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate, Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate, Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate, Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate, Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate, Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate)in Graph.o Graph::Graph(Graph::Coordinate)in Graph.o Graph::Graph() in Graph.o Graph::Graph() in Graph.o Graph::Graph() in Graph.o Graph::Graph() in Graph.o Graph::Graph() in Graph.o Graph::Graph() in Graph.o ld: symbol(s) not found collect2: ld returned 1 exit status I checked the code and couldn't find anything out of the ordinary. Here are the four class files: (Sorry if it's a lot of code to sift through.) Coordinate.h class Graph{ #include "Coordinate.h" public: Graph(); Graph(Coordinate); Graph(Coordinate, Coordinate); Graph(Coordinate, Coordinate, Coordinate); void setXSize(int); void setYSize(int); void setX(int); //int corresponds to coordinates 1, 2, or 3 void setY(int); void setZ(int); int getXSize(); int getYSize(); double getX(int); //int corresponds to coordinates 1, 2, or 3 double getY(int); double getZ(int); void outputGraph(); void animateGraph(); private: int xSize; int ySize; Coordinate coord1; Coordinate coord2; Coordinate coord3; }; Coordinate.cpp #include <iostream> #include "Coordinate.h" Coordinate::Coordinate() { xCoord = 1; yCoord = 1; zCoord = 1; xVel = 1; yVel = 1; zVel = 1; } Coordinate::Coordinate(double xCoo) { xCoord = xCoo; yCoord = 1; zCoord = 1; xVel = 1; yVel = 1; zVel = 1; } Coordinate::Coordinate(double xCoo,double yCoo) { xCoord = xCoo; yCoord = yCoo; zCoord = 1; xVel = 1; yVel = 1; zVel = 1; } Coordinate::Coordinate(double xCoo,double yCoo,double zCoo) { xCoord = xCoo; yCoord = yCoo; zCoord = zCoo; xVel = 1; yVel = 1; zVel = 1; } void Coordinate::setXCoord(double xCoo) { xCoord = xCoo; } void Coordinate::setYCoord(double yCoo) { yCoord = yCoo; } void Coordinate::setZCoord(double zCoo) { zCoord = zCoo; } void Coordinate::setXVel(double xVelo) { xVel = xVelo; } void Coordinate::setYVel(double yVelo) { yVel = yVelo; } void Coordinate::setZVel(double zVelo) { zVel = zVelo; } double Coordinate::getXCoord() { return xCoord; } double Coordinate::getYCoord() { return yCoord; } double Coordinate::getZCoord() { return zCoord; } double Coordinate::getXVel() { return xVel; } double Coordinate::GetYVel() { return yVel; } double Coordinate::GetZVel() { return zVel; } Graph.h class Graph{ #include "Coordinate.h" public: Graph(); Graph(Coordinate); Graph(Coordinate, Coordinate); Graph(Coordinate, Coordinate, Coordinate); void setXSize(int); void setYSize(int); void setX(int); //int corresponds to coordinates 1, 2, or 3 void setY(int); void setZ(int); int getXSize(); int getYSize(); double getX(int); //int corresponds to coordinates 1, 2, or 3 double getY(int); double getZ(int); void outputGraph(); void animateGraph(); private: int xSize; int ySize; Coordinate coord1; Coordinate coord2; Coordinate coord3; }; Graph.cpp #include "Graph.h" #include "Coordinate.h" #include <iostream> #include <ctime> using namespace std; Graph::Graph() { Coordinate coord1(0); } Graph::Graph(Coordinate cOne) { coord1 = cOne; xSize = 20; ySize = 20; } Graph::Graph(Coordinate cOne, Coordinate cTwo) { coord1 = cOne; coord2 = cTwo; xSize = 20; ySize = 20; } Graph::Graph(Coordinate cOne, Coordinate cTwo, Coordinate cThree) { coord1 = cOne; coord2 = cTwo; coord3 = cThree; xSize = 20; ySize = 20; } void Graph::setXSize(int size) { xSize = size; } void Graph::setYSize(int size) { ySize = size; } int Graph::getXSize() { return xSize; } int Graph::getYSize() { return ySize; } void Graph::outputGraph() { } void Graph::animateGraph() { } Thanks very much for any help!

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  • Class Problem (c++ and prolog)

    - by Joshua Green
    I am using the C++ interface to Prolog (the classes and methods of SWI-cpp.h). For working out a simple backtracking that john likes mary and emma and sara: likes(john, mary). likes(john, emma). likes(john, ashley). I can just do: { PlFrame fr; PlTermv av(2); av[0] = PlCompound("john"); PlQuery q("likes", av); while (q.next_solution()) { cout << (char*)av[1] << endl; } } This works in a separate code, so the syntax is correct. But I am also trying to get this simple backtracking to work within a class: class UserTaskProlog { public: UserTaskProlog(ArRobot* r); ~UserTaskProlog(); protected: int cycles; char* argv[1]; ArRobot* robot; void logTask(); }; This class works fine, with my cycles variable incrementing every robot cycle. However, when I run my main code, I get an Unhandled Exception error message: UserTaskProlog::UserTaskProlog(ArRobot* r) : robotTaskFunc(this, &UserTaskProlog::logTask) { cycles = 0; PlEngine e(argv[0]); PlCall("consult('myFile.pl')"); robot->addSensorInterpTask("UserTaskProlog", 50, &robotTaskFunc); } UserTaskProlog::~UserTaskProlog() { robot->remSensorInterpTask(&robotTaskFunc); // Do I need a destructor here for pl? } void UserTaskProlog::logTask() { cycles++; cout << cycles; { PlFrame fr; PlTermv av(2); av[0] = PlCompound("john"); PlQuery q("likes", av); while (q.next_solution()) { cout << (char*)av[1] << endl; } } } I have my opening and closing brackets for PlFrame. I have my frame, my query, etc... The exact same code that backtracks and prints out mary and emma and sara. What am I missing here that I get an error message? Here is what I think the code should do: I expect mary and emma and sara to be printed out once, every time cycles increments. However, it opens SWI-cpp.h file automatically and points to class PlFrame. What is it trying to tell me? I don't see anything wrong with my PlFrame class declaration. Thanks,

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