C / C++ / MFC

Re: battleship game code using c language

27-Aug-14 22:15

Then I'm afraid you will have to write it yourself, or pay someone to do it for you. Please read http://www.codeproject.com/Messages/2922875/HOW-TO-ASK-A-QUESTION.aspx[^] before posting questions to the forums.

Member 1048772029-Aug-14 0:30

Member 10487720

29-Aug-14 0:30

If you are learning to code, then asking others to code for you is not the way to go. If you are having trouble getting started, you should put some effort into making the game yourself, and then ask when you run into problems.

TEventLogger

Zdravko Donev25-Aug-14 9:34

Zdravko Donev

25-Aug-14 9:34

I want to make a log with errors during the execution of my app. I'm trying to write an event to the windows Event Viewer with a VCL form application with C++ Builder XE5.
I'm using Vcl.SvcMgr.TEventLogger class.
The code in the header file is :

C++

TEventLogger *Event;

The code in the cpp file is :

C++

Event=new TEventLogger("MySource"); 
Event->LogMessage("MyMessage");

But beside my message, in the error description in the Event Viewer there is a message : "The description for Event ID 0 from source MySource cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted." . How can I remove that description and write only the message that I want? Should I be using other C++ class? I couldn't find any documentation about this class. The idea of using Event Viewer is that when the application is running on an user with restricted rights he won't be able to write to files, meaning I can't just type into a ".txt" file. If anyone else has a different idea how to make a log with errors, please share! Smile | :)

Re: TEventLogger

Freak3027-Aug-14 1:25

Freak30

27-Aug-14 1:25

If I remember corrctly, you don't pass the message to Event Viewer directly, but you pass an application name and message id. You need a DLL that contains the texts to the ID (don't ask me in what format). And you need a specific registry key (in local machine I think) pointing the Event Viewer to the path of the DLL. We also used this approach long ago in one of our applications but aren't using it anymore because it's so complicated.

I would suggest the user needs to at least one directory where he/she has write permission. You could then enter the directory into some kind of ini file, read it on application start and write the log file into that directory.

The good thing about pessimism is, that you are always either right or pleasently surprised.

CMFCOutlookBar cannot return to pane 0.

Drakesal25-Aug-14 0:12

Drakesal

25-Aug-14 0:12

Hi i am writing a simple app with doc/viw architecture, now i have to buttons in the Outlook bar "Folders" and "Calendar" now i want that when restart the app the selected pane will be always the 0 -> "Folders" now i tried this:

CMFCOutlookBarTabCtrl* pOutlookBar = (CMFCOutlookBarTabCtrl*)m_wndNavigationBar.GetUnderlyingWindow();

pOutlookBar->SetActiveTab(0);

After this nothing happen. Why this?

i wait for your precious response Smile | :)

Giovanni

how to pass a function which has variable arguments as template argument?

Falconapollo24-Aug-14 5:37

Falconapollo

24-Aug-14 5:37

I want to write a adapter which can convert non static member functions to C-sytle function pointers. Here is what I got now(see the following code snippet), but the current solution is not general. I want to make

C++

int (T::*Func)(int)

accept variable arguments. but i'm stuck here? anybody can help me?

and it's necessary to make

C++

int f()

and

C++

int display

have the same signature.

The final goal is Interfacing C++ member functions with C libraries.

C++

class StoreVals
    {
        int val;
    public:
        int display(int k) { cout << k << endl; return 0; }
    };

template<class T, int (T::*Func)(int) >
class CObjectT
{
public:
    /*
     the signagure of f(...) should change by the argument of template. they must be the same, but i don't know how to achieve this goal
    */
    static int f(int i)
    { 
        T obj;
        return (obj.*Func)(i);
    }
};

void main()
{
 CObjectT<StoreVals, &StoreVals::display>::f(7);
 auto function_t = &CObjectT<StoreVals, &StoreVals::display>::f;
 cout << typeid(function_t).name() << endl; // now it's a c-style function pointer
}

Re: how to pass a function which has variable arguments as template argument?

jschell25-Aug-14 10:30

jschell

25-Aug-14 10:30

Falconapollo wrote:
The final goal is Interfacing C++ member functions with C libraries.

If you want your C++ code to call C libraries then you use

extern "C" {
...// C code and/or declarations.
}

If you want C libraries to call your C++ code then you must provide a C interface to it.

How to ShellExecute a PDF to a specific page

DanYELL23-Aug-14 17:28

DanYELL

23-Aug-14 17:28

I have a PDF. If I use this

CString Path = GetPath("manual.pdf");
ShellExecute(0, "open", Path, NULL, NULL, SW_SHOWNORMAL);

The PDF executes. But if I then use

Path += "#page=17";
ShellExecute(0, "open", Path, NULL, NULL, SW_SHOWNORMAL);

or anything similar, I cant get the PDF to execute. I want the PDF to
execute and jump to a specific page. I found solutions, I think, where
I can execute the adobe.exe file and the path, but I dont know where
adobe.exe is located on these computers. Is there any way to execute
a PDF without knowing where the adobe executable is at?

Please, any response any one can give me will be greatly appreciated.

enhzflep23-Aug-14 17:58

enhzflep

23-Aug-14 17:58

I suspect you can't open it to a specific page without knowing where Acrobat resides, but no matter - you can find that out from the registry apparently.

If you have a look at the key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\AcroRd32.exe\ you can get the full-path of the exe.

From there, it's seems to be just a matter of passing that file to shell execute along with using a parameter that includes (1) the full path to the pdf doc and (2) the desired page num.

Anyhoo - here's my source: http://www.devhut.net/2013/12/04/vba-open-a-pdf-to-a-specific-page/[^]

Richard MacCutchan23-Aug-14 22:30

23-Aug-14 22:30

The third parameter in the call to ShellExecute[^] can be used to pass the extra parameters to the called application. All you need to do is check Adobe reader for the format of those parameters.

Graham Breach23-Aug-14 23:00

Graham Breach

23-Aug-14 23:00

Another thing to think about is whether the computers you are targetting have Adobe reader installed at all. Personally, I use SumatraPDF for viewing PDFs, but there is a Microsoft reader app (its name escapes me right now), Foxit Reader, and probably others. Each of them could have different ways to specify the page to show first.

how this error has generated -c program?

David Crow25-Aug-14 3:52

David Crow

25-Aug-14 3:52

What is the net value of Path?

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles

mybm122-Aug-14 20:33

Re: how this error has generated -c program?

22-Aug-14 20:33

Quote:
fatal error: Utility1.h: No such file or directory
compilation terminated.

Richard MacCutchan22-Aug-14 21:07

Re: how this error has generated -c program?

22-Aug-14 21:07

The message is telling you what is wrong; what is it about "No such file or directory" that you do not understand?

Given this and your other questions, I strongly recommend you get hold of a decent reference on C programming. You cannot expect to learn it by asking repeated questions here.

mybm122-Aug-14 22:42

Re: how this error has generated -c program?

22-Aug-14 22:42

but it is inside the directory that wat i was asking is it due to logical error or wat?

Richard MacCutchan23-Aug-14 0:16

can anyone suggest how to convert matlab code into c code..for resampling function

23-Aug-14 0:16

Are you sure that your project configuration includes that directory in its search path?

mybm121-Aug-14 19:10

Re: can anyone suggest how to convert matlab code into c code..for resampling function

21-Aug-14 19:10

Quote:
can anyone suggest how to convert matlab code into c code..for resampling function

Richard MacCutchan21-Aug-14 21:50

Re: can anyone suggest how to convert matlab code into c code..for resampling function

21-Aug-14 21:50

This question is impossible to answer. Code conversion is mostly a manual task. If you want an automated conversion tool then you should use Google to find suggestions.

mybm121-Aug-14 23:11

Re: can anyone suggest how to convert matlab code into c code..for resampling function

21-Aug-14 23:11

what is this catalysis MCS tool..

Richard MacCutchan21-Aug-14 23:23