C / C++ / MFC Discussion Boards

FISH78627-Mar-09 0:36

27-Mar-09 0:36

Yes that works. when the calculation results in a smaller number.
I change my int to _int64 and i get a 0 in the output obviously with some compile warnings about loss of data.

Is there an identical function for int64.

thanks a million.

Re: Help with Binary

Michael Schubert27-Mar-09 0:40

Michael Schubert

27-Mar-09 0:40

FISH786 wrote:
Is there an identical function for int64

Here are all the variations:
http://msdn.microsoft.com/en-us/library/yakksftt(VS.80).aspx[^]

Re: Help with Binary

CPallini27-Mar-09 0:43

CPallini

27-Mar-09 0:43

What about two calls to itoa? Smile | :)

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.
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[My articles]

Re: Help with Binary

Roger Stoltz27-Mar-09 0:33

Roger Stoltz

27-Mar-09 0:33

FISH786 wrote:
What am I missing?

Well, you need to know what the different operations do and how to use them when building your algorithm. This is a good exercise.

Some hints:
You are e.g. right shifting value by bit steps and put the result in mask. Unless bit equals zero, value and mask will most likely be different. Then you check if mask and value are the same.... Suspicious | :suss:

It also looks like you're starting from the right (with the least significant bit) in value, but starts from the left in the string....

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

Re: Help with Binary

FISH78627-Mar-09 1:31

FISH786

27-Mar-09 1:31

Yes that was the idea. To make this work and look up how the operators and shifting works.
Thanks for your help.

Re: Help with Binary

CPallini27-Mar-09 0:35

CPallini

27-Mar-09 0:35

do you mean this

//..
int bit;
for ( bit = 0; bit < 4; bit++)
{
   string[3-bit] = '0' + (value & 1);
   value >>= 1;
}
 string[bit] = '\0';

?

However the above code generates 0010 when value=2.

Re: Help with Binary

Michael Schubert27-Mar-09 0:39

Michael Schubert

27-Mar-09 0:39

CPallini wrote:
However the above code generates 0010 when value=2

What's wrong with that?

Re: Help with Binary

CPallini27-Mar-09 0:45

CPallini

27-Mar-09 0:45

It is not wrong, of course... Big Grin | :-D

Anyway he may prefer 10 instead of 0010.
Smile | :)

Re: Help with Binary

Michael Schubert27-Mar-09 0:51

Michael Schubert

27-Mar-09 0:51

Ah, I see.

Re: Help with Binary

Divyang Mithaiwala27-Mar-09 0:42

Divyang Mithaiwala

27-Mar-09 0:42

Hi FISH786,

Change following

int mask = value >> bit;

with

int mask = 8 >> bit;

This code change is applicable for 4 digit binary number only.

regards,
Divyang Mithaiwala
Software Engineer

Re: Help with Binary

Stuart Dootson27-Mar-09 0:45

Stuart Dootson

27-Mar-09 0:45

Your mask calculations aren't quite right (in that you aren't necessarily generating a mask with a single bit set). Using a loop, I'd implement your conversion to binary like this:

char string[64] = {0};
int value = 2;
for (int bit = 3; bit >= 0; bit--)
{
   const int mask = 1 << bit;
   string[(3-bit)] = (mask==(value&mask))?'1':'0';
}
string[4] = '\0';
std::cout << string << std::endl;

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: Help with Binary

David Crow27-Mar-09 3:07

David Crow

27-Mar-09 3:07

One interpretation looks like...

FISH786 wrote:
char string[64];

Change this to:

char string[64] = { '\0' };

FISH786 wrote:
int mask = value >> bit;

Remove this.

FISH786 wrote:
if ((value & mask) == mask)

Change this to:

if (value & 1)

Add this below the if/else:

value = value >> 1;

FISH786 wrote:
string[4] = '\0';

Remove this.

When the loop ends, your binary string will be in reverse order. A simple call to strrev() will fix that.

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

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Problem in loading Image,GetLastError 33

hemlat26-Mar-09 23:01

hemlat

26-Mar-09 23:01

Hi,
I am loading JPG images using follwing code.

image.Load(Image);
HBITMAP hbmp = image.Detach();
if(hbmp == NULL)
{		
     Error = GetLastError();
}

Load function is failing and I am getting error code 33.
I am searching in google.But I am not getting any useful information.
can anyone help me.

Re: Problem in loading Image,GetLastError 33

CPallini26-Mar-09 23:15

CPallini

26-Mar-09 23:15

From WinError.h:

//
// MessageId: ERROR_LOCK_VIOLATION
//
// MessageText:
//
// The process cannot access the file because another process has locked a portion of the file.
//
#define ERROR_LOCK_VIOLATION 33L

Re: Problem in loading Image,GetLastError 33

Michael Schubert27-Mar-09 0:50

Michael Schubert

27-Mar-09 0:50

In order to get the actual message from the OS you may use FormatMessage()

Something like:

DWORD dwError = ::GetLastError();
LPTSTR lpBuffer;
CString csErrorMsg;

if (::FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL, dwError,
              MAKELANGID(LANG_NEUTRAL, SUBLANG_SYS_DEFAULT), (LPTSTR)&lpBuffer, 0, NULL) != 0)
{
  csErrorMsg.Format("%s", lpBuffer); //csErrorMsg contains the message
}

Re: Problem in loading Image,GetLastError 33

David Crow27-Mar-09 3:08

David Crow

27-Mar-09 3:08

hemlat wrote:
Load function is failing and I am getting error code 33.

If Load() is failing, you should be calling GetLastError() after it, not Detach().

Memory leak problem

Pryabu26-Mar-09 22:31

Pryabu

26-Mar-09 22:31

Hi,

I have loaded a bitmap image to a dialog. The exe memory is increased by 1MB. The memory remains the same after closing the dialog. How to clear this memory.

Thanks,

Re: Memory leak problem

S p k 52126-Mar-09 22:58

S p k 521

26-Mar-09 22:58

May be the cleanup jobs are not done fully like bitmap's DeleteObject()

Re: Memory leak problem

Pryabu26-Mar-09 23:43

Pryabu

26-Mar-09 23:43

I have tried with DeleteObject function,but still memory is not getting reduced.

Re: Memory leak problem

KarstenK26-Mar-09 23:03

KarstenK

26-Mar-09 23:03

You should unload the bitmap. Refer the way youd load the bmp. D'Oh! | :doh:

Press F1 for help or google it.
Greetings from Germany

Re: Memory leak problem

Pryabu26-Mar-09 23:45

Pryabu

26-Mar-09 23:45

I am using LoadBitmap(nIDResource) to load image to dialog

Re: Memory leak problem

KarstenK26-Mar-09 23:59

KarstenK

26-Mar-09 23:59

will the CBitmap object get destroyed (or going out of scope)?

Press F1 for help or google it.
Greetings from Germany

Re: Memory leak problem

SandipG 27-Mar-09 0:15

SandipG

27-Mar-09 0:15

Please show some code.

Regards,
Sandip.

Re: Memory leak problem

Roger Stoltz27-Mar-09 0:19

Roger Stoltz

27-Mar-09 0:19

Provided that you properly destroy the object, you don't have to worry about what Task Manager or similar tells you since it doesn't tell you what you think it does.

Read more here[^].

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

Re: Memory leak problem

Joe Woodbury27-Mar-09 5:54

Joe Woodbury

27-Mar-09 5:54

If you are dynamically allocating memory from the C++ heap, the heap will generally not be reduced in size when that memory is freed. One alternative would be to directly allocate your own memory from windows using GlobalAlloc.

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