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I have a function that accepts a 'pointer to an int' as a parameter. In my code I call this function and pass to it the address of the variable. However, the variable at this address is an unsigned short. How do I cast this to an int since my function needs a 'pointer to an int'?
class Foo{
void Function(int *A);
}
Foo.Function(&Element[22]);
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Foo.Function((int *) &Element[22]);
/ravi
My new year's resolution: 2048 x 1536
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ravib@ravib.com
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Yes but you better make sure the system you are on they are both the same storage width otherwise strong bad could ensue.
Watch out! I'm a CPian on the edge!
I have a new Gold rating and I'm not afraid to use it! -pete
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What do you mean same storage width? Maybe that is why I am having difficulty getting the right value for what is in that address. I did exactly what was suggested but did not get the result I expected. I expect a value of 0 but now I get some huge number... Do you know why? Thanks!
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It turns out that it is grabbing the value at &Element[22] and &Element[23] when i only want the value at &Element[22]. But I cannot change the function's parameter because it is called from other classes that do pass 'pointer to int' values. In Foo.Function(int *A) I have:
{
int value;
value = A[0];
...
...
}
A[0] becomes what is in Element[23]... it should be Element[22]. Is there something wrong? Although A[1] would contain the value I want, it does not make sense to change it so. What should I do?
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The following should work. You create a variable that is the correct size, and the compiler should do the conversion correctly, then pass a pointer to that. Basicly the compiler cannot assume you don't know what you are doing when you cast things around.
MyFunct() {
int tmpValue;
short myArray[SIZE];
...
tmpValue = myArray[position];
otherFunct(&tmpValue);
myArray[position] = tmpValue;
...
}
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Thanks! I did exactly that and you confirmed my solution. (I don't think I need that last line of code right?)
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I don't know if you need that last line or not. If the function has const declarded in the right place (without a book to check I'm not going to say more lest I get it wrong) you don't. If the function will change the value you pass in (and why else take a pointer to an int?) then you need that last line if you want to save the change. It is your call though, as only you know what the data represents.
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I am making a game called Champions. I do not know anything about C++ I need to know exactly how to connect to mysql database through DLL files plus I'll need to know what to type into the DLL files.
in table1 I have 3 columns for info: 1st column is Username, 2nd is password, and 3rd is status(tells what type of user he/she is)
in table2 I will have 10 columns for info: 1st is name(character's name), 2nd is username, 3rd is con, 4th is dex, 5th is str, 6th is intel, 7th is cha, 8th is wis, 9th is race, and 10th is class. I need to know how to control mysql database through C++ and DLL files. Remember I know knowing about C++. I also want to ask for an IP address to connect to before connecting because the IP address will change alot. have it connect to database on that IP address.
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You want to talk to Christian Graus[^]. He has a system that does all that.
Watch out! I'm a CPian on the edge!
I have a new Gold rating and I'm not afraid to use it! -pete
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Where can I get his system?
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palbano is trying to make my life hell, because I am known to have a short fuse when people ask idiotic questions. If you know nothing about C++, why are you asking a question about it ? What are you writing your game in ? I suggest you use the same 'language' for your data layer, and if it can't handle that ( which is after all, a core thing that computers find easy to do ), ask yourself the odds of it creating a half decent game. MySQL is, in any case, crap. You may as well use Access. Either way, it sounds to me like you're lost at sea, and need to seriously evaluate what sort of project you're capable of taking on.
Christian
I have drunk the cool-aid and found it wan and bitter. - Chris Maunder
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Christian Graus wrote:
palbano is trying to make my life hell
And you didn't even 5 me! 
Sorry I couldn't resist. But I all but promise I will almost for sure, probably just about never do that again 
Watch out! I'm a CPian on the edge!
I have a new Gold rating and I'm not afraid to use it! -pete
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While I don't agree with Christian's approach, I do agree with his intent.
Linera wrote:
I do not know anything about C++ I need to know exactly how to connect to mysql database through DLL...
Remember I know knowing about C++. I also want to ask for an IP address to connect to before connecting because the IP address will change alot. have it connect to database on that IP address.
Why in the world would you want to use a language for which you know nothing about? What do you have against using C (or C++ if that's all you have access to) to make some "starter" programs with first? For example: converting fahrenheit to celcius and back, writing to and reading from a file, averaging numbers entered from the keyboard, calculating free/used space on all drives, etc. Get some of the basics out of the way before "diving into the deep end of the pool."
Linera wrote:
I also want to ask for an IP address to connect to before connecting because the IP address will change alot. have it connect to database on that IP address.
Since the IP address is subject to change, wouldn't it make more sense to use a host name instead and let DNS-lookup find the correct IP address, whatever it happens to be today?
"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen
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I've defined my own slider class, with a CONST max range value 10000.
When i press a button to retrieve it's value, it works fine(even with >100 values).
When i call OnHScroll, it's value never passes 100.
How do i make to retrieve bigger values in call of OnHScroll ?
Or is there any way to ovveride OnLButtonDown and OnLButtonUp, to be accessed by main window "OnLButtonDown and OnLButtonUp" (i tried to check if the mouse click is in slider's rect, but the app reports a click only if the slider is disabled).
Thanks alot for help in advance 
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I am a "italiano" and I do not know l'inglese I would want to understand the perche quamdo I compile with visual the study the 2002 programs are tied to of the DLL that occupy a lot and I must find in turn for the PC?
io sono un italiano e non so l'inglese vorrei capire il perche quamdo compilo con il visual studio 2002 i programmi si legano a delle dll che occupano molto e devo trovare in giro per il pc?
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Hi!
I have a list of images, all in raw 24-bit format and of the same size. Now i need to create a "streaming" video of them. The video should be played back by windows media player over the net. By streaming i mean, that the video can start playing before all the video data has been downloaded. Audio must not be supported, but it would be great for expanding the whole thing. I'm currently working with VC++ 7.0.
Could anyone help me with that? Any example code or tutorials on that exisiting?
Thanks for any help,
Corin
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If anything can help you, it's DirectX9.
Christian
I have drunk the cool-aid and found it wan and bitter. - Chris Maunder
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Hello 
I was wondering if there is a easy way to add a richtextbox to a Win32 app?
The "Edit Box" looks to old-school.
Thanks.
humpa humpa
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Yes, there is.
Platform SDK supports a control called 'Rich Edit Control'. For creating and using documentation, refer to this[^] MSDN link.
In short, call CreateWindowEx and specify RICHEDIT_CLASS as the window class name. For more detailed information, read the MSDN topic.
-Antti Keskinen
----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.
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Hi,
I have an application that writes hundreds of small files (video) to the disk.
i want to be able to limit the size of disk the application is using, so when a certain quota is reached, it starts deleting the oldest files to make room.
the files are saved in directories named after the date they were created in, and under another directory, that specifies it's source, so going through all these files every time the limit is near may be inefficient, but i have to support a directory structure clear enough for a user to access manually later, so i can't just put them all in one directory and sort by date.
any suggestions on strategies to this sort of disk management ?
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This is what disk quotas is for. However, I'm not sure how to enable it programmatically. My first guess, since it's a policy-level change, is it's not a trivial task. This might be a starting point.
"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen
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