C / C++ / MFC Discussion Boards

Re: Difference among INT, INT32, LONG, LONG32...?

SandipG 2-Jun-08 1:10

SandipG

2-Jun-08 1:10

This would be compiler and platform dependent.

Regards,
Sandip.

Re: Difference among INT, INT32, LONG, LONG32...?

Maxim Zarus2-Jun-08 1:21

Maxim Zarus

2-Jun-08 1:21

I dont think so. All are used in VC++ on same compiler(VS 2005) and same platform(Windows).
Please describe the difference.

By the way, Thanks for your effort. Smile | :)

Re: Difference among INT, INT32, LONG, LONG32...?

SandipG 2-Jun-08 1:27

SandipG

2-Jun-08 1:27

see int and long both will be 4 bytes each on windows(VC++). but still they are kept as is may be for backward compatibility.

If you really want the difference try to find sizes for these data types on all the windows versions for above then you will get an idea.

Regards,
Sandip.

Re: Difference among INT, INT32, LONG, LONG32...?

Maxim Zarus2-Jun-08 1:37

Maxim Zarus

2-Jun-08 1:37

Please tell me about all not only two. Also, I want to know about INT, INT32, LONG, LONG32 not int and long. If you can, please compare atleast these four data types.

Regards,
Maxim.

Re: Difference among INT, INT32, LONG, LONG32...?

CPallini2-Jun-08 1:39

CPallini

2-Jun-08 1:39

Have you problems with documentation?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

Re: Difference among INT, INT32, LONG, LONG32...?

Maxim Zarus2-Jun-08 1:48

Maxim Zarus

2-Jun-08 1:48

No, not at all. But I am little bit confused.
I am just curious to know the difference among them on same windows version with same compiler.
I am talking about their uses and importance also need. I have used all in my program and not found any difference. That is why I am asking here.
Because you all are experienced and experts.
Please guide me.

Sorry, If i am wrong or rude anywhere.

Regards,
Maxim.

Re: Difference among INT, INT32, LONG, LONG32...?

Maxim Zarus2-Jun-08 1:54

Maxim Zarus

2-Jun-08 1:54

Sir, Can I know the reason of down voted?
Is my way of asking question is not right?
I am new here in this forum. I was just trying to explain me before all of you... Smile | :)

Thanks.
Maxim.

Re: Difference among INT, INT32, LONG, LONG32...?

CPallini2-Jun-08 7:26

CPallini

2-Jun-08 7:26

I can only guess (since I didn't down vote you): possibly your post appeared a bit rude.
Smile | :)

Re: Difference among INT, INT32, LONG, LONG32...? [modified]

SandipG 2-Jun-08 1:41

SandipG

2-Jun-08 1:41

i am trying to tell you only one thing is today there might not be any difference but still these will be kept as is for compatibility.

Tomo with vista and 64bit machines coming in , int , long, int64 all might have 64 bit values but still they will be maintained different for compatibility.

Regards,
Sandip.

modified on Monday, June 2, 2008 8:03 AM

Re: Difference among INT, INT32, LONG, LONG32...?

Rajkumar R2-Jun-08 1:59

Rajkumar R

2-Jun-08 1:59

SandipG wrote:
Tomo with vista and 64bit machines coming in , int int32 int64 all might have 64 bit

if int32 have 64 bit then it is meaningless.

Re: Difference among INT, INT32, LONG, LONG32...?

Rajkumar R2-Jun-08 1:58

Rajkumar R

2-Jun-08 1:58

some info [What's the difference between int and INT, long and LONG, etc?
^]
and type suffixed with number of bits like INT32, INT16, ... is typedefed to guaranteed the number of bits it uses, say INT32 is sure to store 32 bit value, while INT is not; depends on platform.

Re: Difference among INT, INT32, LONG, LONG32...?

SandipG 2-Jun-08 2:03

SandipG

2-Jun-08 2:03

I will change my reply but i am not saying it i just took it as an example.

Regards,
Sandip.

Re: Difference among INT, INT32, LONG, LONG32...?

Maxim Zarus2-Jun-08 2:08

Maxim Zarus

2-Jun-08 2:08

Helpful link. Thanks.
And your answer is also very supportive.
Giving you 5 votes... Smile | :)

Re: Difference among INT, INT32, LONG, LONG32...?

KarstenK2-Jun-08 2:40

KarstenK

2-Jun-08 2:40

The difference on the windows platform isnt there, but if you use the source-code on other platforms or other compilers than from MS there 'maybe' differences. Unsure | :~

But LONGLONG, LONG64 are resolved to 64-bit data on WIN64 so there can stroe 64-bit data!!!

Greetings from Germany

UpdateAllViews

sawerr2-Jun-08 0:35

sawerr

2-Jun-08 0:35

Hi
When clicks on View, my program draws ellipse and I tried to make all changes in one view reflects to all views.

1-)OnLbuttonDown adds a point to CArray m_PointList

2-)UpdateAllViews calls OnUpdate

3-) OnUpdate Invaliates so OnDraw called.

void CDocumentView::OnLButtonDown(UINT nFlags, CPoint point)
{
	GetDocument()->m_PointList.Add(point);
	GetDocument()->UpdateAllViews(NULL);

	CView::OnLButtonDown(nFlags, point);
};
//
void CDocumentView::OnDraw(CDC* pDC)
{
	CDocumentDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	if (!pDoc)
		return;
	for(int i = 0; i < GetDocument()->m_PointList.GetCount(); i++)
	{
		pDC->Ellipse(GetDocument()->m_PointList[i].x - GetDocument()->m_PointSize, 
                             GetDocument()->m_PointList[i].y - GetDocument()->m_PointSize,
			     GetDocument()->m_PointList[i].x + GetDocument()->m_PointSize, 
                             GetDocument()->m_PointList[i].y + GetDocument()->m_PointSize);
	}
}
//
void CDocumentView::OnUpdate(CView* /*pSender*/, LPARAM /*lHint*/, CObject* 
/*pHint*/)
{
	// TODO: Add your specialized code here and/or call the base class
	Invalidate();
}

But when i open a new document, it doesn't draw ellipse which is m_PointList , it shows a clean view window. And when i started to click also it doesn't change the other views.

Where am i wrong?

Re: UpdateAllViews

SandipG 2-Jun-08 1:13

SandipG

2-Jun-08 1:13

If you open a new dicument contents of m_PointList will be changed ,isn't it?
because you will be having new docuemnt class pointer.

Regards,
Sandip.

Re: UpdateAllViews

sawerr2-Jun-08 1:32

sawerr

2-Jun-08 1:32

Sorry;
When i clicked File->New (Ctrl+N).
My CArray m_PointList is in the document file (DocumentDoc.h).

For every new view, same doc file using, right? Same m_PointList?
But something wrong and i can't find it.

Re: UpdateAllViews

SandipG 2-Jun-08 1:38

SandipG

2-Jun-08 1:38

its not about using same document.h file.
everytime new instance of CDocuemnt will be created when you do ctrl+N
so every time m_PointList will have default values.

Regards,
Sandip.

Re: UpdateAllViews

sawerr2-Jun-08 1:48

sawerr

2-Jun-08 1:48

What?
If so,
But why do we call updateallviews? Isn't that for all the views that created with Ctr+N?
Isn't that advantage of Doc/View architecture, One Document and multiple views?

I am really surprised.

Re: UpdateAllViews

SandipG 2-Jun-08 1:57

SandipG

2-Jun-08 1:57

Listen UpdateAllView is for updating All views associated with one instance of document. (not the views associated with different instances of documents.)

Consider TreeView1 ListView1 both are associated to docuemnt1.
Now when you call UpdateAllViews for docuement1 then Treeview1 and listview1 will be updated.

Regards,
Sandip.

Re: UpdateAllViews

Nelek2-Jun-08 4:43

Nelek

2-Jun-08 4:43

I agree with Sandi, you are creating new documents, so you will have new pairs Doc-View and the new ones have nothing to do with the old ones.

If you DO want to have only one document and more views... take a look here[^]

Regards.
--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
“The First Rule of Program Optimization: Don't do it. The Second Rule of Program Optimization (for experts only!): Don't do it yet.” - Michael A. Jackson
Rating helpfull answers is nice, but saying thanks can be even nicer.

A Simple Password Generator

Werty fool2-Jun-08 0:27

Werty fool

2-Jun-08 0:27

Hi everyone, I've been trying to make a simple password generator such that when i enter a number and click generate, a random string of
alphanumeric characters is generated. my problem is every time i click generate, only 1 letter seems to appear. Any help will be greatly appreciated. Source code is as follows:

#include <windows.h>
#include <iostream>
#include <string.h>
#include <cstdlib>
#include <ctime>
#include "resource.h"

BOOL CALLBACK DlgProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
switch(Message)
{
case WM_INITDIALOG:

SetDlgItemInt(hwnd, ID_PASSWORD,1, FALSE);

case WM_COMMAND:
switch(wParam)
{
case ID_GENERATE:
{
char alpha[80]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
char passwrd[80]="";
int numChars = GetWindowTextLength(GetDlgItem(hwnd, ID_PASSWORD));
if(numChars > 0)
{
// Now we allocate, and get the string into our buffer
srand(static_cast<unsigned>(time(0)));

for (int n=0; n<numchars; n++)<br="" mode="hold"> {
int x;
x = 0 + int(61.0 * rand()/(RAND_MAX+1.0));
passwrd[n]= alpha[x];
}

This is the main problem -----------------> MessageBox(NULL, passwrd, "Word Generated", MB_OK);

int index = SendDlgItemMessage(hwnd, IDC_LIST, LB_ADDSTRING, 0, (LPARAM)passwrd);

GlobalFree((HANDLE)passwrd);
}
else
{
MessageBox(hwnd, "You didn't enter anything!", "Warning", MB_OK);
}
}
}
break;
case WM_CLOSE:
EndDialog(hwnd, 0);
break;
default:
return FALSE;
}
return TRUE;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow)
{
return DialogBox(hInstance, MAKEINTRESOURCE(IDD_DIALOG), NULL, DlgProc);
}

Re: A Simple Password Generator

CPallini2-Jun-08 0:52

CPallini

2-Jun-08 0:52

Please surround code snippets with <pre> tags.
also escape < when appropriate (you may use < for the purpose).
Smile | :)

Re: A Simple Password Generator

James R. Twine2-Jun-08 2:54

James R. Twine

2-Jun-08 2:54

your character generation routine seems strange. Try something simple like:

for (int n=0; n < <code>PWLengthLessThan62</code>; n++ )
{
    passwrd[n] = alpha[ rand() % 62 ]; // 62 Characters in your buffer
}
passwrd[ 80 ] = '\0'; // Ensure buffer is terminated

   Might want to expand the characters used in your random password. Sticking to alnums is not too secure, IMHO.

   You also have a character buffer for the password, so there is no reason to be messing around with any global memory routines.

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<hr></hr>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

Re: A Simple Password Generator

Werty fool2-Jun-08 5:32

Werty fool

2-Jun-08 5:32

Thanks for the help. Managed to get it work

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.