array passing problem - C / C++ / MFC Discussion Boards

Re: New caching proxy server, using C++, STL, boost

CPallini24-Apr-09 2:51

CPallini

24-Apr-09 2:51

denrrr wrote:
send me e-mail with short description about your skills

My skill is recognizing this is not the right forum to post your open-source project advertising.
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.
-- Iain Clarke

[My articles]

Re: New caching proxy server, using C++, STL, boost

denrrr24-Apr-09 2:55

denrrr

24-Apr-09 2:55

Would you like to take part?

Re: New caching proxy server, using C++, STL, boost

CPallini24-Apr-09 3:07

CPallini

24-Apr-09 3:07

I see we're expressing ourselves with different languages... Roll eyes | :rolleyes:

Re: New caching proxy server, using C++, STL, boost

denrrr24-Apr-09 3:11

denrrr

24-Apr-09 3:11

Yes, you're right. I understand your message, but anyway, I mean, maybe you're interesting Smile | :)

Re: New caching proxy server, using C++, STL, boost

CPallini24-Apr-09 3:23

CPallini

24-Apr-09 3:23

denrrr wrote:
I mean, maybe you're interesting

Well I know I'm interesting: are you a blonde princess? Roll eyes | :rolleyes:

Re: New caching proxy server, using C++, STL, boost

Stuart Dootson24-Apr-09 3:35

Stuart Dootson

24-Apr-09 3:35

CPallini wrote:
I know I'm interesting

What, you're a blonde princess?!?!?!??! Poke tongue | ;-P

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

Re: New caching proxy server, using C++, STL, boost

CPallini24-Apr-09 5:38

CPallini

24-Apr-09 5:38

Stuart Dootson wrote:
What, you're a blonde princess?

Yes, a bit hairy, though. Big Grin | :-D

array passing problem

VCProgrammer24-Apr-09 2:20

VCProgrammer

24-Apr-09 2:20

Hi all,

I am facing a very basic problem and i am not getting why its occuring... Please help me for this...

i have simply made a char array.

unsigned char array[1024];

i am assigning a value in it and then i am passing this array in a function like this..

func(array);

void func(unsigned char array[1024])
{
///some processesing inside
}

but when i debug my program my passed array is showing first value.

i tried using pointer also, but the result is same

func(array);
void func(unsigned char *array)
{
//some processing inside
}

can anybody plz help me this....

Re: array passing problem

CPallini24-Apr-09 2:28

CPallini

24-Apr-09 2:28

VCProgrammer wrote:

but when i debug my program my passed array is showing first value.

Do you mean the debugger shows you only the first value?
Or, for instance, array[1] has a wrong value?
Smile | :)

Re: array passing problem

VCProgrammer24-Apr-09 2:32

VCProgrammer

24-Apr-09 2:32

it only shows one value....

rest data is missing... it seems like variable has got one value only....

Re: array passing problem

CPallini24-Apr-09 2:40

CPallini

24-Apr-09 2:40

VCProgrammer wrote:
rest data is missing...

How can you see that?
Could you post please the relevant code?
Smile | :)

Re: array passing problem

Stuart Dootson24-Apr-09 3:34

Stuart Dootson

24-Apr-09 3:34

VCProgrammer wrote:
but when i debug my program my passed array is showing first value.

That's because in C and C++, arrays ARE pointers. That means that (for example) the 10th element of an array called arr is accerssible using arr[9] or *(arr + 9).

Your function is passed a pointer to the first element - that is what an array is! Don't worry, though - all the elements of the array are accessible from your function. Just not from the debugger Smile | :)

However, if you go to the Immediate Window in the debugger, you can enter something like:

? array[10]

and see the 11th element of the array.

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

Re: array passing problem

David Crow24-Apr-09 4:07

David Crow

24-Apr-09 4:07

VCProgrammer wrote:
can anybody plz help me this....

Read here.

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

"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

Re: array passing problem

krmed24-Apr-09 6:06

krmed

24-Apr-09 6:06

Inside your function, the debugger doesn't really know the size of your array, since it's really a pointer to the start of the array.

You could open a watch window and type

array,1024

and it will then display all 1024 values.

Hope that helps.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
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GDI+: How to draw an icon

akirilov24-Apr-09 2:19

akirilov

24-Apr-09 2:19

Hi guys,

I'm not sure is this the right place to ask, but I know that you are the right people Smile | :)

I want to draw an icon from an ico file on the screen (lets say main form).
Can you show me a fragment of code (C++ preferably, GDI+) that will load an icon file and display the second sub-icon from it (in the .ico I have one icon in three dimensions. I want to see the second dimension).

Thanks in advance!

Re: GDI+: How to draw an icon

Stuart Dootson24-Apr-09 3:30

Stuart Dootson

24-Apr-09 3:30

There are several[^] CodeProject[^] articles[^] that could be of use.

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

Date compare

MsmVc24-Apr-09 2:08

MsmVc

24-Apr-09 2:08

Hi All

How can i compare two Date?I have starting date a="22/2/2009" and current date b="24/4/2009".How can i compare a and b is equal or not?Plz help me

Re: Date camper

Cedric Moonen24-Apr-09 2:11

Cedric Moonen

24-Apr-09 2:11

MsmVc wrote:
How can i camper two Date?

Camper ? You mean compare ? How are your dates stored ? If you have two strings, just compare the two strings. Have a look at the COleDateTime class[^] also.

Cédric Moonen
Software developer

Charting control [v2.0 - Updated]
OpenGL game tutorial in C++

Re: Date camper

CPallini24-Apr-09 2:13

CPallini

24-Apr-09 2:13

Cedric Moonen wrote:
If you have two strings, just compare the two strings

Provided they have the same format... Roll eyes | :rolleyes:

Re: Date camper

CPallini24-Apr-09 2:21

CPallini

24-Apr-09 2:21

MsmVc wrote:
I have starting date a="22/2/2009" and current date b="24/4/2009".How can i camper a and b is equal or not?

They looks not equal. Big Grin | :-D

You may transform the strings into two COleDateTime objects (just using properly ParseDateTime method) and the use the COleDateTime's == operator.
Smile | :)

Re: Date compare

David Crow24-Apr-09 4:10

David Crow

24-Apr-09 4:10

You could use something like difftime(). If you are using MFC, check out CTime or COLEDateTime. Short of that, you could convert each to a number in YYYYMMDD format and just compare like you would any other number.

Re: Date compare

Joe Woodbury24-Apr-09 15:45

Joe Woodbury

24-Apr-09 15:45

You can also fill in a SystemTime structure, and then call SystemTimeToFileTime, and then CompareFileTime.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Problem calling a DLL from another DLL

Mohammad A Gdeisat24-Apr-09 1:30

Mohammad A Gdeisat

24-Apr-09 1:30

Hi there,

I have a DLL (DLL_1)for some measurement instrument that exports some functions, when I load DLL_1 from an MFC application and call Function_1 everything goes fine, but this not the way I want to use DLL_1. What I am trying to do is to create another DLL (DLL_2) to load the DLL_1 and call Function_1 but this always fails with a memory read error saying something like: "the memory at address 0x5435345 could not be read", this is wiered coz it is exactly the same code on the same machine.

btw: Function_1 has one integer parameter so I don't think it has anything to do with passing parameters to the function!

Could this have anything with the way DLLs manage memory? Any help? Any ideas?

Thanks alot

And ever has it been that love knows not its own depth until the hour of separation

Mohammad Gdeisat

Re: Problem calling a DLL from another DLL

Cedric Moonen24-Apr-09 1:48

Cedric Moonen

24-Apr-09 1:48

Did you try to use your debugger to retrieve more information about the problem ?

Cédric Moonen
Software developer

Charting control [v2.0 - Updated]
OpenGL game tutorial in C++

Re: Problem calling a DLL from another DLL

Mohammad A Gdeisat24-Apr-09 3:22

Mohammad A Gdeisat

24-Apr-09 3:22

Hi,

Unfortunately I have the DLL as release mode executable with no debugging information at all! the only thing the debugger will be able to display is some assembly code along with memory addresses which are not likely to be of much use, if you think that I can use them in someway plz let me know.

btw: the function call (that craches when is made from a DLL) is so simple that it goes like this:

int res = MyFunction(4);

Cheers

And ever has it been that love knows not its own depth until the hour of separation

Mohammad Gdeisat

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