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Your class, DataOperations, has a private constructor (ctor), DataOperations(), and a private destructor, dtor, ~DataOperations(). I believe your program requires your ctor and dtor to be public.
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ah ha! working now. thanks a lot. I thought default constructors were public by default.
thanks again!
Thanks,
John
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i need to supply the name of the XML document when i run the program,,is it right what i did?
it didn't work? how can i make it plz?
#using<<mscorlib.dll>>
using namespace System;
#using <<system.xml.dll>>
using namespace System::Xml;
int main(int argc, char* argv[])
{
//check for required arguments
if (argc <2)
{
Console::WriteLine("Usage :CppXmlTextReader path");
return -1;
}
String^ path = gcnew String(argv[1]);
try
{
//create the reader...
XmlTextReader^ rdr = gcnew XmlTextReader(path);
//Read nodes
while (rdr->Read())
{
//do something with the data
}
//read nodes
while (rdr->Read())
{
switch (rdr->NodeType)
{
case XmlNodeType::XmlDeclaration:
Console::WriteLine("->XML declaration");
break;
case XmlNodeType:ocument:
Console::WriteLine("->Document node");
break;
case XmlNodeType::Element:
Console::WriteLine("->Element node, name{0}",rdr->Name);
break;
case XmlNodeType::EndElement:
Console::WriteLine("->End element node,name={0}",rdr->Name);
break;
case XmlNodeType::Text:
Console::WriteLine("->Text node,value={0}",rdr->Value);
break;
case XmlNodeType::Comment:
Console::WriteLine("->Comment node, name={0},value={1}",rdr->Name,rdr->Value);
break;
case XmlNodeType::Whitespace:
break;
default:
Console::WriteLine("**UnKnown node type");
break;
}
}
}
catch (Exception^ pe)
{
Console::WriteLine(pe->ToString());
}
return 0;
}
-- modified at 15:54 Monday 13th March, 2006
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Try using "int main(array<System::String ^> ^args)" instead of "int main(int argc, char* argv[])"!
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i got the following error:
error c2693: '<':illegal comparison for references to a managed array when i check on arguments,,how can i solve it? how about the constructor?
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// In C++/CLI the "exe" name is not included in the argument array.
// If your path has has spaces, be sure to surround it with quotes.
// Example CppXmlTextReadr "c:\program files\file.xml"
int main(array<System::String ^> ^args)
{
if (args->Length < 1)
{
Console::WriteLine("Usage :CppXmlTextReader path");
return -1;
}
String^ path = args[0];
Console::WriteLine(path);
return 0;
}
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Excuse me, Sorry,,but i don't know where to place the path of the XML file,,
when i run my program in the command line i write it? or how?
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If you are talking about running your program from Visual Studio, here is what you do:
1. Right-click on your project.
2. Click on "properties"
3. Under "Configuration Properties", click on "Debugging".
4. On the right of the window, you will find "Command Arguments". Place your arguments there.
Peace
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Hello all people,
I need make a application that update the BIOS information:
Vendor name, BIOS Version, BIOS build date and more.
I used to know that I have to use the 52h function. I don´t know how complex is this task.
That app must run on DOS.
I really need that. Can be Basic, QBasic, Fortran, Cobol, Assembler, C/C++. Any DOS suported language!!
thanks all!
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C++/CLI does not run in DOS. You may not get your answer here!
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Hello all people,
I need make a application that update the BIOS information:
Vendor name, BIOS Version, BIOS build date and more.
I used to know that I have to use the 52h function. I don´t know how complex is this task.
somebody have a code to make this. may be in any language ( mainly in C/C++).
thanks all!
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C++/CLI does not run in DOS. You may not get your answer here!
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a dll not had source, how know it parameter's number and is WINAPI or CDECL?
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Since you posted in the C++/CLI forum, you implicitly admit your DLL was written in .NET. If you were lying and this DLL was not written in .NET then you have just posted in the wrong message board. Repost this question in the message board.
Note that in .NET, CLR functions only have one calling convention, and that is __clrcall. The WINAPI or CDECL stuff only applies to native DLLs. If your function has uses WINAPI/CDECL, then your function is not written in .NET (see above).
Also note that .NET DLLs do not export their CLR functions as dllexports. Instead, the functions are stored as Metadata, and are discovered using Reflection.
The quick way to check the function signature is to add the DLL as a project reference (Project -> References -> Add New Reference -> Browse -> select your DLL -> OK OK). If this doesn't work, then your DLL is not a .NET DLL (see above).
Now click on view Object Browser, and go down to the namespace of the DLL. This will show you all the function signatures in that DLL.
How do you do this programmatically?
The functions to use are given in System::Reflection. Once you have the System::Assembly of the DLL, call the Assembly::GetTypes method to get all the types of the assembly. Then you can call the GetMethods to get the methods in that Type (including private ones).
To get the number and type of parameters, check out MethodInfo::GetParameters. That should allow you to discover the signature of the method.
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Alright say we have the following template class:
<br />
template <class T><br />
class Data {<br />
public:<br />
Data() : data(0) { } <br />
Data(T buff) : data(buff) { }<br />
void updateData(T buff) { data = buff; };<br />
T returnData() { return data; };<br />
private:<br />
T data;<br />
};<br />
is there anyway to find out which type was sent to the template argument T (such as int, char*, double, etc.)?
i would like to use an if or switch statement inside one of the classes functions such as:
<br />
void Data<T>::someFunction() {<br />
if (T == int) {
} else {
.. do this<br />
}<br />
}<br />
Thanks in advance for any help.
Carl
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Is it possible if you could post a code fragment with an example of template specialization?
Thank you,
Carl
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template <class T>
ref class Message
{
public:
void foo() { Console::WriteLine("Called Message<T>::foo()"); }
};
// Specialization
template <>
ref class Message<long>
{
public:
void foo() { Console::WriteLine("Called Message<long>::foo()"); }
};
int main(array<System::String ^> ^args)
{
Message<String^> ^stringMessage = gcnew Message<String^>;
Message<long> ^longMessage = gcnew Message<long>;
stringMessage->foo();
longMessage->foo();
return 0;
}
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I have a little graphics demo to demonstrate a transformation class I'm doing and the Sleep() function seems to be working incorrectly. The program is a little tank that the user can move around with the keyboard. I use sleep on every cycle to try to slow down the frames per sec so the tank is controllable. If I omit Sleep() the program seems to run correctly, the tank is very quick and uncontrollable. I want to slow it to about Sleep(4) but when I use this it slows much more than 4 milliseconds per frame. From about Sleep(1) to Sleep(50) it's the same slow pace. Over 50 and it works correctly slowing in increments according to the number of milliseconds.
If anyone has had a similar problem or can just offer some advice it would be much appreciated.
I'll include a little code, if not enough please tell me.
I call Sleep() at the end of this function.
This is my function for glutIdleFunc(myIdle). It runs myIdle while the function has no imput.
void myIdle()
{
glClear(GL_COLOR_BUFFER_BIT);
if(upPressed == 1 && userBullet.getBulletCheck() == 0)
{
if(userBullet.getBulletCheck() == 0)
{
userBullet.setBulletStart(userTank.getBulletStart());
userBullet.setBulletCheck(1);
userBullet.setBulletDirection(userTank.getCurrentTurretDir());
}
userTank.drawTank();
}
if(wPressed == 0 && sPressed == 0 && aPressed == 0 && dPressed == 0 && rightPressed == 1 && leftPressed == 0)
{
userTank.rotateTurret(1);
userTank.drawTank();
}
/**In between these two code chunks is just more of the same, different operatios for different button presses.**/
if(sPressed == 1 && wPressed == 0 && dPressed == 1 && aPressed == 0 && rightPressed == 0 && leftPressed == 1)
{
userTank.rotateTurret(-1);
userTank.moveTankBck();
userTank.rotateBody(1);
userTank.drawTank();
}
userTank.drawTank();
if(userBullet.getBulletCheck() == 1 )
{
userBullet.moveBullet();
}
Sleep(4);
glutSwapBuffers();
}
-- modified at 19:05 Saturday 11th March, 2006
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Sleep won't do what you are looking for because for so low sleep time, it is not accurate at all due to the non-real time behavior of the operating system. As windows is not a real-time OS, precision under 10 or 15 msec is unachievable. Instead of what you are doing, prefer another method: make a loop that will get the time and update your program every X msec:
int PastTime = GetTickCount();
while (true)
{
int TimeElapsed = GetTickCount() - PastTime;
if (TimeElapsed >= 30)
{
}
}
This code will update your program every 30 msec.
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Correct me if i am wrong, but wouldn't it be better to use a timer instead of a while loop? As far as i am aware of while(true) it would mean active waiting and this will cost you valuable cpu time.
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This while loop is used for games (and I suppose this was a game). The problem if you use a timer is that you will have some process time during the update of your game, and this processing time must not have an impact over the game. If you use a timer, the time between two updates will be the time of your timer plus the processing time, which can lead to varying timings (and if you need a specific time, to play animations for example, this will be a big problem).
Another method is to run the loop in continous and update the game everytime and passing the time elapsed.
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Thanks for the replies. I kinda figured it out with a much less elegant solution.
I just ran a for loop from 1 to 1000000 so it slows down a bit. I'm gonna try to implement your method though because this is the way that games handle time I believe. It would probably make it easier to flesh out a game in the future. Thanks again.
-- modified at 19:29 Monday 13th March, 2006
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zdog1 wrote: I just ran a for loop from 1 to 1000000 so it slows down a bit
Very very bad idea: the speed will then depend of the speed of the processor on which you run your game. For fast processors, your game will run really fast.
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