C / C++ / MFC

25-Oct-05 1:55

I have created one dialog box. Then I have created a view class
with help of menu Insert -> Form.

CMultiDocTemplate* pNewDocTemplate = new CMultiDocTemplate(
IDR_TRIAL_TMPL,
RUNTIME_CLASS(CMDIDocumentDoc), // document class
RUNTIME_CLASS(CMDIChildWnd), // frame class
RUNTIME_CLASS(trial)); // view class
AddDocTemplate(pNewDocTemplate);

Even New template is seen in File -> New but it does not display
my dialog but gives error "Debug Assertion Failed in viewform.cpp'
I am sure I am missing some step while creation of view class
Please help me

Anonymous25-Oct-05 2:56

Anonymous

25-Oct-05 2:56

shivditya wrote:
...but gives error "Debug Assertion Failed in viewform.cpp'

Have you looked at the line in viewform.cpp to see what condition is causing the assertion to fire?

shivditya25-Oct-05 3:05

25-Oct-05 3:05

No but If I replace my view class name with any view class made by the earlier programmers view class the application is opening its dialogs. I have gone in viewform.cpp but it seems to be useless it is mfc's cpp.

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shivditya25-Oct-05 3:24

25-Oct-05 3:24

Please some body reply

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kakan25-Oct-05 3:33

kakan

25-Oct-05 3:33

If you find the reason why viewform.cpp gets into trouble, then you might find out the cause of why it happens.

shivditya25-Oct-05 16:39

25-Oct-05 16:39

IT IS TELLING LINE NUMBER IN VIEWFORM.CPP WHILE DEBUGGING ,IT IS NOT GOING TO THAT ERROR. WHEN I AM OPENING VIEWFORM.CPP THERE ARE MANY FUNCTIONS HOW CAN I UNDERSTAND WHERE IS ERROR?
I AM BEGINNER SO I AM SURE SOME SILLY STEP I AM MISSING
WHILE CREATING VIEW CLASS PLEASE HELP?

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Anonymous25-Oct-05 19:31

Anonymous

25-Oct-05 19:31

I'm using VS 6.0.
When your program has aborted (while debugging it), take a look in the window below the code window (in Visual studio).
There you have a small window with the name "Context". The text line itself shows the function where the program took a dive.
Now, if you press the down arrow at the right of that text line, you will get a list of all of the functions your program has on it's call stack.
There will be (at least) one function name that you will recognize (because it's in your program).
Select that line and the editor window will show your code, together with a green arrow. The green arrow will point at the line (still in cour code) that was the reason for the error.

Another way to do this (sill in VS 6.0), is to select (from the VS menu), View->Debug Windows->Call Stack (or press Alt-7).
Double-click on the most upper line that has a function name that's in your code and the editor takes you to the line in error.

And please, for your own sake, get a book about Visual Studio. I'm sure you will find the time spent on reading to be worth while.

Good luck.
kakan

enHelp: std::wstring & std::string

kakan25-Oct-05 20:11

kakan

25-Oct-05 20:11

Sorry, I wasn't logged in when i wrote the answer.

chenxiujie24-Oct-05 23:22

chenxiujie

24-Oct-05 23:22

Hello, everyong!

who can tell me the difference between "std::wstring" and "std::string" ? For unicode, I want to replace "std::string"
with "std::wstring", what I should pay attention to ? Please instruct me, thanks a lot!

Re: enHelp: std::wstring & std::string

Achim Klein25-Oct-05 0:18

Achim Klein

25-Oct-05 0:18

http://www.codeproject.com/string/cppstringguide1.asp
http://www.codeproject.com/string/cppstringguide2.asp

Regards,
Achim Klein

We can do no great things, only small things with great love. - Mother Theresa

Re: enHelp: std::wstring & std::string

chenxiujie25-Oct-05 15:01

chenxiujie

25-Oct-05 15:01

Thank you very much!

Best regards.

Problem in stretching an image

Arrun24-Oct-05 23:19

Arrun

24-Oct-05 23:19

Hi I am doing a image prcessing project in VC++, I am using bilinear interpolation for stretching the images but the image intensity varies before stretching and after stretching.

for eg:
If the image intensity for a square of 1 unit = 1xI1.
If I stretch the image to 2 units then the intensity should be 2xI2
both the intensities should be equal
ie 1xI1 = 2xI2 = k(constant)

Pls help

Re: Problem in stretching an image

John M. Drescher24-Oct-05 23:50

John M. Drescher

24-Oct-05 23:50

I think this is a result of roundoff. Are you doing your calculation with floating point numbers and translating them back to integers?

John

Re: Problem in stretching an image

Arrun25-Oct-05 0:09

Arrun

25-Oct-05 0:09

Thanks for ur reply

Yes I am calculating it with floating point numbers and translating it back to integers.

Is there a problem with that? or should I use density filter to get the same intensity

Logritmic plot...help needeed

Raza568024-Oct-05 22:44

Raza5680

24-Oct-05 22:44

i want to include the feature for logarithmic plots in my application ...but i am having trouble scaling the y-axis ...(bcoz points they are not equally spaced.)
anyone has an idea or expereince in this regard
thanks

Re: Logritmic plot...help needeed

Cedric Moonen24-Oct-05 22:57

Cedric Moonen

24-Oct-05 22:57

What do you want to do exactly ? Plot a point on a logarithmic axis ? That is convert his value into a screen position ? If yes, you can use the following code:

long Offset = (int)floor((log10(Value)-log10(m_MinValue)) * GetAxisLenght()/(log10(m_MaxValue)-log10(m_MinValue)) );<br />
<br />
long ScreenPos = m_StartPos + Offset;

Value is the value you want to plot on the axis
m_MinValue is the minimum value of the axis (the real value I mean, not a screen position)
m_MaxValue is the maximum value of the axis
GetAxisLenght() returns the length in pixel of the axis
m_StartPos is the start position (in Screen coordinate) of the axis.

It works fine because I use this code in a chart control I developped some time ago.

How to make Memory MOdel Huge In Vc++

gsheladia24-Oct-05 21:51

gsheladia

24-Oct-05 21:51

Dear Readers,
In my project i m facing problem of memory model at some stage if my internal memory usage is exceed then its gice me error or some times it dont allow to open perticuler window. this is done if i make my double array size id huge like 800000 count.so please help me wht to do for this.and i cant able to use CArray of such type of things. so pleas ehelp me for this.

gunjan

khan++24-Oct-05 22:05

khan++

24-Oct-05 22:05

In 16-bit programs, there was the option of different memory models, but in 32-bit, and 64-bit, it is Flat. So you can allocate as much memory as the OS will allow you. The problem seems like the OS is denying you memory. Solution should be (I think) Allow more hard disk space on the drive where windows is installed. And, Install more Ram.

this is this.

John M. Drescher24-Oct-05 22:36

John M. Drescher

24-Oct-05 22:36

In a 32 bit windows program you can not make a single array larger than about 1.2 GB of memory unless you use the LARGEADDRESSAWARE complier flag and boot with a system that supports such a flag. There is some info here about this:

[EDIT]Oops... That is not that big of an array, look below for the solution. [/EDIT]

John

-- modified at 5:44 Tuesday 25th October, 2005

BadKarma24-Oct-05 23:11

BadKarma

24-Oct-05 23:11

Hi,

How do you allocate the memory??

Like an array

double dblID[800000];

if this is the case the stack could be to small so you have to create it on the heap instead like this:

<code>double* pDblArray = new double[800000];
// you can still access it like an array
pDblArray[0] = 0.0;

// don't forget to free the memory
delete [] pDblArray;</code>

Hope this solves your problem

codito ergo sum