C / C++ / MFC

Re: please help !!generation of uniform random numbers

15-Nov-09 23:57

how do i write a function that generates random numbers of type double between two bounds with a uninform probability density to calculate the mean and the standard deviation of a distribution of real numbers

can someone help me with codes please

CPallini16-Nov-09 0:08

Re: please help !!generation of uniform random numbers

16-Nov-09 0:08

double getRand(double dMin, double dMax)
{
  return dMin + (  rand() / (RAND_MAX + 1.0) * (dMax-dMin) ); 
}

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Ahmed Charfeddine16-Nov-09 0:09

Ahmed Charfeddine

16-Nov-09 0:09

Assuming the bounds are uMax and uMin

double uResult = (uMax-uMin)*( (double) (rand()%100))*0.01 +uMin;

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Re: please help !!generation of uniform random numbers

Archer justice16-Nov-09 0:33

Re: please help !!generation of uniform random numbers

16-Nov-09 0:33

hi thanks for the codes but i have more problems because i am now studying the c++ programming language Confused | :confused:

CPallini16-Nov-09 0:45

Re: please help !!generation of uniform random numbers

16-Nov-09 0:45

Archer justice wrote:
but i have more problems because i am now studying the c++ programming language

Well, studying the language should sooner make you a fantastic problem-solver... Roll eyes | :rolleyes:

Archer justice16-Nov-09 0:54

Re: please help !!generation of uniform random numbers

16-Nov-09 0:54

thanks Pallini for the encouragement
but unfortunately i have an assignment to summit on histograms, chi square and gaussian random numbers and i don't know what to do because i have been struggling since last week but to no avail
Confused | :confused:

CPallini16-Nov-09 1:01

Re: please help !!generation of uniform random numbers

16-Nov-09 1:01

So you need gaussian (not uniform) random numbers?
Smile | :)

Archer justice16-Nov-09 1:06

Help: How to autofit CListCtrl's background?

16-Nov-09 1:06

all of them together with the code of chi square

Symfund15-Nov-09 22:49

Re: Help: How to autofit CListCtrl's background?

15-Nov-09 22:49

My dialog is resizable with a list control, and the list control's rect is the whole of dialog's client rect, call CListCtrl::SetBkImage to enable background. My question is how to autofit(stretch) background with the dialog when resizing? Thanks.

Ahmed Charfeddine16-Nov-09 0:12

Ahmed Charfeddine

16-Nov-09 0:12

What if your try call ::SetBkImage again when the OnSize member is triggered ?

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Re: Help: How to autofit CListCtrl's background?

Symfund16-Nov-09 1:36

Multiple Inheritance problem

16-Nov-09 1:36

void CMyDlg::OnSize(UINT nType, int cx, int cy)
{
CDialog::OnSize(nType, cx, cy);

// TODO: Add your message handler code here
if (IsWindow(m_ListCtrl.m_hWnd))
{
CRect rect;
GetClientRect(rect);
m_ListCtrl.MoveWindow(rect);
m_ListCtrl.SetBkImage(::LoadBitmap(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDB_BKIMAGE)));
}
}

problem still unresolved, autofit(stretch) no effect! Thanks!

dde

trioum15-Nov-09 20:01

trioum

15-Nov-09 20:01

I am using following piece of code to update excel using dde . I am updating the g_count
as my excel connect it cell get updated with value = 10 ; But I am not able to send string

value i.e. "xyzabcd" etc to the excel cell ,so how can I send string to the excel sheet

using dde

int g_count = 10;
short xltableData[100];
// tdtTable record...
xltableData[0] = 0x0010; // tdtTable
xltableData[1] = 4; // 2 short ints following
xltableData[2] = 1; // # rows
xltableData[3] = 1; // # cols

// tdtInt record...
xltableData[4] = 0x0006;
xltableData[5] = 2;
xltableData[6] = (short)g_count;
DdeCreateDataHandle(g_idInst, (UCHAR*)xltableData, 2*7, 0, g_hszItemName, fmt, 0);

Trioum

Re: dde

Maxwell Chen15-Nov-09 22:26

Maxwell Chen

15-Nov-09 22:26

Use BSTR.

Maxwell Chen

Re: dde

trioum15-Nov-09 23:31

trioum

15-Nov-09 23:31

I try lot but could not success. can you suggest be some piece of code to pass the binary string .can you replace my code for string

Trioum

Re: dde

Maxwell Chen16-Nov-09 1:13

Maxwell Chen

16-Nov-09 1:13

Sorry, my bad. After looked at the prototype of DdeCreateDataHandle[^], it really takes a LPBYTE argument.

Maxwell Chen

Rahul Vaishnav15-Nov-09 19:34

Rahul Vaishnav

15-Nov-09 19:34

Hi all,

I have one problem in using Multiple Inheritance, please go through below Code

class Base1
{
 public:
   void Show()
   {
    cout<<"Base1";
   }
 
};
class Base2
{
 public:
   void Show()
   {
    cout<<"Base2";
   } 
};
class Derived: public Base1,public Base2
{
}
main()
{
Derived d;
d.Show();
}

Error: error C2385: ambiguous access of 'show'
Please provide some solution for the above code. Can virtual Base class concept work in this,if yes then how?

Symfund15-Nov-09 20:11

15-Nov-09 20:11

What's the difference between upcasting and downcasting?

Rahul Vaishnav15-Nov-09 20:32

Rahul Vaishnav

15-Nov-09 20:32

Symfund wrote:
What's the difference between upcasting and downcasting?

I am sorry but,I didn't get how this question answers my question?

CPallini15-Nov-09 20:53

15-Nov-09 20:53

And what are the differences between Bose-Einstein and Dirac-Fermi statistics?
Big Grin | :-D

Symfund15-Nov-09 22:08

15-Nov-09 22:08

Syntax Error: WOW! Chinglish! I am not a native English speaker. Poke tongue | ;-P

Naveen15-Nov-09 20:39

Naveen

15-Nov-09 20:39

Rahul Vaishnav wrote:
d.Show();

The error is because the compiler do not know which Show() function it should call. Show() of Base1 or Base2. Actually which one do you want to call?

You have to tell the compiler which one excatly. like

d.Base1::Show();
or
d.Base2::Show();

nave

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Rahul Vaishnav15-Nov-09 22:01

Rahul Vaishnav

15-Nov-09 22:01

Thank you...

CPallini15-Nov-09 20:51