Re: FFT Commands or Noise Test - C / C++ / MFC Discussion Boards

Re: MSSQL Database get database

MsmVc16-Dec-09 20:15

MsmVc

16-Dec-09 20:15

ok i am waiting for your example..

Re: MSSQL Database get database

MsmVc16-Dec-09 22:33

MsmVc

16-Dec-09 22:33

hi durga

i have solve problem to show database through this code

spDatabases = spSQLServer->Databases;
	 for(int i=1;i<=spDatabases->Count;i++) {
    spDatabase = spDatabases->Item(i);
    _bstr_t db_name(spDatabase->GetName());
    CString s((LPCSTR)db_name);
	m_lsmssqldatabase.AddString(s);
    }

Can you give me idea how to show Table Name of particullar database.Plz help me

Re: MSSQL Database get database

Durga_Devi16-Dec-09 23:25

Durga_Devi

16-Dec-09 23:25

Cool yaar!
What's the mistake have u done?

The query for fetching the table name is "select name from sysobjects where type = 'U'".
This query will display the table name that is created by user.

Before executing this, run the query "use <ur db="" name="">".

ListControl

jannathali13-Dec-09 19:01

jannathali

13-Dec-09 19:01

i am having a list control.The data in the list control is continiuosly updating.when the data increases i.e wen the scroll bar is usd i cant see the data, i.e wen iam scrolling it dwn, it is gng up since it is continuosly updating data. Is there any method

Re: ListControl

Adam Roderick J13-Dec-09 19:08

Adam Roderick J

13-Dec-09 19:08

Just try virtual list control Using virtual lists[^]

Величие не Бога может быть недооценена.

Re: ListControl

CPallini13-Dec-09 21:18

CPallini

13-Dec-09 21:18

You may gather and store data, updating the list only when needed (i.e. after user - you may notify to the user that new data is available - request or periodically).
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.

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-- Iain Clarke

[My articles]

FFT Commands or Noise Test

richellechua13-Dec-09 18:01

richellechua

13-Dec-09 18:01

Hi Guys,

Im working now on a project related to Noise Test for an Op-AMP. i am to make use of the digitizer which requires me to use FFT commands to digitize the time domain signal of the Noise that i am going to measure. Does anybody know FFT commands that ic an use to see the noise signal on tiem domain? my frequency of interests are 1Khz and 10Hz, i need the commands on C language. Ideas would be greatly appreciated.

you could mail me at rchua07@yahoo.com.

Re: FFT Commands or Noise Test

T210213-Dec-09 20:47

T2102

13-Dec-09 20:47

Fast Fourier Transforms? Google the Fastest Fourier Transform in the West.

Recursive problem

Haim Nachum13-Dec-09 13:19

Haim Nachum

13-Dec-09 13:19

Hi.

Suppose i have a function that takes an array and its length.
That function should search the entire array for each element and return a result.

example:

<br />
<br />
  int rec(int arr[], int length)<br />
      {<br />
          if(length == 0)<br />
             return 0;<br />
<br />
            //search array for element length - 1;<br />
            searchingarr(arr,length -1);<br />
           <br />
           rec(arr[],length - 1);<br />
      }<br />

Now . i cant use loops(while or for), no static variables. only one function inside the rec and use only recursive. i cant put a sign in the array that points to the end either.

the problem here is that i want that each time im calling "searchingarr" i paste him the length of the array. here, the length is substracted by 1 each time i call rec.

Re: Recursive problem

Richard Andrew x6413-Dec-09 14:34

Richard Andrew x64

13-Dec-09 14:34

Could you restate your question exactly?

What is the function looking for? What is it supposed to return?

Re: Recursive problem

Haim Nachum13-Dec-09 14:48

Haim Nachum

13-Dec-09 14:48

the function(searcharr) should take an element and check if there is a sequence of summed elements that is equal to the index of that element.

example arr{ 1 , 3, 2 , 0 , 0 , 3}

arr[2] = 3.
because 2(i=2) + 0(i=3) + 0(i=4) gives us the value 3 that is the length of the sequence that when summed gives us the value of the index(2).

Re: Recursive problem

Richard Andrew x6413-Dec-09 14:51

Richard Andrew x64

13-Dec-09 14:51

But arr[2] = 2, not 3.

Re: Recursive problem

Haim Nachum13-Dec-09 15:48

Haim Nachum

13-Dec-09 15:48

arr{ 1 , 3, 2 , 0 , 0 , 3}

the index 2 in the array have a value that is equal to the sequence of 3 elements(2 , 0 , 0) thus the returning value is 3.

Re: Recursive problem

Richard Andrew x6413-Dec-09 15:54

Richard Andrew x64

13-Dec-09 15:54

So what is your algorithm?

Can you write the algorithm in words?

[Message Deleted]

Omegaclass13-Dec-09 18:12

Omegaclass

13-Dec-09 18:12

[Message Deleted]

Re: Recursive problem

Nelek15-Dec-09 20:56

Nelek

15-Dec-09 20:56

It looks like homework.

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
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Help with arrays

Chidori-chan13-Dec-09 8:43

Chidori-chan

13-Dec-09 8:43

I'm attempting (and failing horribly) to put a function that draws multiple circles into an array.
I will be using flags to turn the circles on and off, and I need to initialize it in my main function so the random generator won't run every time the screen refreshes. This is what I have so far in putting my circles in an array:

I get an error on this first line here saying : c:26: error: expected identifier or ‘(’ before ‘[’ token
I've no idea why, it looks like it's set up right to me

struct Row1[15] = {drawCircleRow1()}

int drawCircleRow1()
{	
	for
	(o=0; o<15; o++)
	{
	random_generator(0,3);		
	glPushMatrix();
	glTranslatef((o+1.9)*28,455,1);
		
		if (randomValue == 0)
		{
	glColor3f(0,.5,0);

		}
		else if (randomValue == 1)
		{
	glColor3f(.5,0,0);

		}
		else
		{
	glColor3f(0,0,.5);

		}
	glLineWidth(1.0);
	drawCircle(14,200);
	glPopMatrix();

	}
		
}

int main(int argc, char* argv[])
{
	
	glutInit(&argc, argv);

	ballPhysics();
	glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGBA);
	glutInitWindowSize(WIDTH, HEIGHT);
	glutCreateWindow("Bubble Buster");

	glutDisplayFunc(displayFunction);
	glutSpecialFunc(functionSpecial);
	glutKeyboardFunc(keyboardFunction);
	glutTimerFunc(1,timerFunction,0);


	gluOrtho2D(0, WIDTH, 0, HEIGHT);

	glClearColor(1, 1, 1, 0);

	glutMainLoop();
	return 0;


}

Luc Pattyn13-Dec-09 8:58

Luc Pattyn

13-Dec-09 8:58

"o" is by far the worst identifier one could possibly choose for a variable as it is short (OK, so are "i" and "n"), and easily confused with "0".

Hmmm | :|

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Re: OT

CPallini13-Dec-09 10:19

CPallini

13-Dec-09 10:19

Nah, 'O' is worse. And 'thisIsTheOuterLoopIndex' even worse. Big Grin | :-D

Re: OT

Luc Pattyn13-Dec-09 10:27

Luc Pattyn

13-Dec-09 10:27

CPallini wrote:
'O' is worse. And 'thisIsTheOuterLoopIndex' even worse.

Nope. 'O' is better than 'o' as you have better probability in finding (and replacing) those in an editor without hitting keywords such as 'for' and 'continue'; and 'thisIsTheOuterLoopIndex' is self-descriptive which is good (unless it were incorrect).

Hmmm | :|

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Re: OT

LunaticFringe13-Dec-09 10:33

LunaticFringe

13-Dec-09 10:33