Re: Create Random number - C / C++ / MFC Discussion Boards

Halawlaws1-Aug-05 2:28

1-Aug-05 2:28

yes because if u open the dialog and move it u will have different position of mouse also on each different computer it will be different

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Re: Create Random number

Maximilien1-Aug-05 2:30

Maximilien

1-Aug-05 2:30

so ?

what exactly you want to do ? ( besides the random numbers ) .

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: Create Random number

Halawlaws1-Aug-05 2:32

Halawlaws

1-Aug-05 2:32

The software allow users to create random serial number for there companies based on the serial number of the product. This random number is sold later if a certain client need to enable something in his device.

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Re: Create Random number

Maximilien1-Aug-05 2:35

Maximilien

1-Aug-05 2:35

why do you want to use the mouse position ?

just generate the number with srand ( or rand, or some other methods ) and be done with it.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: Create Random number

Halawlaws1-Aug-05 2:36

Halawlaws

1-Aug-05 2:36

i need to complicate it so the user cannot use the usual function of C++ to generate such a code

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Re: Create Random number

David Crow1-Aug-05 3:12

David Crow

1-Aug-05 3:12

The odds of that happening would be 1 in 32,768.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: Create Random number

C^hris L^osinger1-Aug-05 4:56

C^hris L^osinger

1-Aug-05 4:56

if the user is smart enough to watch your code call srand, he's smart enough to watch your code get the current mouse position.

Cleek | Image Toolkits | Thumbnail maker

Re: Create Random number

David Crow1-Aug-05 3:07

David Crow

1-Aug-05 3:07

You'd be better off using a GUID for this. You can use the guidgen.exe utility, or use CoCreateGuid() if you need it at run-time. The algorithm is already established, plus you cannot achieve true randomness with rand(), or any other function for that matter.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: Create Random number

knapak1-Aug-05 11:26

knapak

1-Aug-05 11:26

Hello

In my opinion, a better way to do what you need is to use one of the random number generator routines in "NUMERICAL RECIPIES": http://www.library.cornell.edu/nr/cbookcpdf.html

Scroll down to Ch. 7 in that page and you'll find a lot of algorithms that will be by far better you can come up using only your machine generator. You'll still need it, but the algorithms provide better "randomness" in your numbers and they are sorted by the way you need them to have certain statistical distributions. If you need them to have equal probabilities, then use the ran2 algorithm. This code is an implementation of it:

seed = 0;<br />
srand (time(NULL));<br />
rand();<br />
seed = rand();<br />
return ran2(seed);<br />

The return number is a uniform random deviate between 0 and 1. If you need integers just multiply your number as needed and take the integer.

Cheers

Help needed for calculating font height.!!

Rajesh_Parameswaran1-Aug-05 1:32

Rajesh_Parameswaran

1-Aug-05 1:32

Hi All,
I'm trying to customize CEdit control to create dynamically growing and shrinking edit control by height. I'm stucked where I need to calculate the new height of the edit control, when the number of text exceeds the current limit. I 'm having the parameter which tells me the number of lines. I succeeded for the case of small fonts. I used the following formula:

nHeight = 13 * m_LineCount + 6;

This works fine.!!

But I would like to generalize this..! So Can Anyone help me to calculate the height for any font. even if the font is set small / large / custom.

It would be helpful for me if someone can help me to sort this out.!!

Smile | :)

Thanks & Regards!

Rajesh

Re: Help needed for calculating font height.!!

Ritu Kwatra1-Aug-05 1:41

Ritu Kwatra

1-Aug-05 1:41

How about using

CFont *font = GetFont();
LOGFONT lf;
font->GetLogFont(&lf);
nHeight = lf.lfHeight * m_LineCount +6;

I think it will work.

Ritu Kwatra

Re: Help needed for calculating font height.!!

Rajesh_Parameswaran1-Aug-05 21:14

Rajesh_Parameswaran

1-Aug-05 21:14

Hi Ritu,
Thanks for the response. But it seems to be not working throughout.

This works fine for first few lines, after that for some case, the number of lines get incremented by double instead of single.

Expecting more ideas..

Smile | :)

Thanks and regards!!
Rajesh

Re: Help needed for calculating font height.!!

Ritu Kwatra1-Aug-05 23:43

Ritu Kwatra

1-Aug-05 23:43

Hi Rajesh,

Are you sure that your linecount parameter is giving you correct value ?

If possible, mail me the piece of code.

Ritu Kwatra

casting CString to int

Halawlaws1-Aug-05 1:30

Halawlaws

1-Aug-05 1:30

I have a CString of 6 numbers how can i cast into one int variable so i can compare it with different numbers.

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Re: casting CString to int

toxcct1-Aug-05 1:32

toxcct

1-Aug-05 1:32

int i;
CString str = "32";
sscanf(str, "%d", &i);
ASSERT(i == 32);

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: casting CString to int

Halawlaws1-Aug-05 1:41

Halawlaws

1-Aug-05 1:41

One more thing...
can i do this without the Assert coz i don't know the value of str in my program
thx anyway

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Re: casting CString to int

toxcct1-Aug-05 1:49

toxcct

1-Aug-05 1:49

certainly, ASSERT() was just here to show you that aftrer treatment, the int contains the string's value...

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: casting CString to int

Halawlaws1-Aug-05 1:49

Halawlaws

1-Aug-05 1:49

okey thx

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Re: casting CString to int

Marc Soleda1-Aug-05 1:52

Marc Soleda

1-Aug-05 1:52

what about atoi[^]?

Marc Soleda.

... she said you are the perfect stranger she said baby let's keep it like this... Tunnel of Love, Dire Straits.

Re: casting CString to int

Smith#1-Aug-05 2:05

Smith#

1-Aug-05 2:05

copy the string to char then use itoa

regards,
Rookie

Re: casting CString to int

Smith#1-Aug-05 2:06

Smith#

1-Aug-05 2:06

sorry atoi

regards,
Rookie

Re: casting CString to int

Eytukan1-Aug-05 2:43

Eytukan

1-Aug-05 2:43

Rookieee wrote:
int i;
CString str = "32";
sscanf(str, "%d", &i);ASSERT(i == 32);

int i;
CString str = "32";
sscanf(str, "%d", &i);ASSERT(i == 32);

watz wrong with this ^?

vivek

Re: casting CString to int

toxcct1-Aug-05 3:40

toxcct

1-Aug-05 3:40

vivekuniq wrote:
Rookieee wrote:
int i;
CString str = "32";
sscanf(str, "%d", &i);ASSERT(i == 32);

watz wrong with this ^?

sorry but, this sample is mine, not Rookieee's...

and of course is works Poke tongue | ;-P

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[toxcct][VisualCalc]

Serial number storing

Halawlaws1-Aug-05 0:45

Halawlaws

1-Aug-05 0:45

What is the best way to store 1000000 serial number of 6 numbers?
What type should i use?

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Re: Serial number storing

toxcct1-Aug-05 1:03

toxcct

1-Aug-05 1:03

sorry ?

what exactly is the question ?

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[toxcct][VisualCalc]

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