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I'm not sure if I understood you, but that's quite simple. An example:
------------------------------------------
#include <iostream.h>
#include <memory.h>
#include <stdlib.h>
void main()
{
char singleLetter;
bool wordCompleted = false;
unsigned int numOfLetters;
unsigned int numOfGuessedLetters = 0;
cout << "Number of letters: ";
cin >> numOfLetters;
char* pArray1 = new char[numOfLetters+1];
char* pArray2 = new char[numOfLetters+1];
memset(pArray2,'_',numOfLetters);
pArray2[numOfLetters] = '\0';
cout << "Type in the word: ";
cin >> pArray1;
system("cls"); // Should the other player see what word we've typed in? 
while(wordCompleted==false)
{
cout << "Type in a letter: ";
cin >> singleLetter;
for(unsigned int i=0;i<numOfLetters;i++)
{
if(singleLetter==pArray1[i])
{
pArray2[i] = singleLetter;
numOfGuessedLetters++;
}
}
if(numOfGuessedLetters==numOfLetters)
{
cout << "\n\n";
cout << "Current status: " << pArray2 << endl;
cout << "Hey dude! You won!" << endl;
break;
}
else
cout << "Current status: " << pArray2 << endl;
}
delete [] pArray1;
delete [] pArray2;
}
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Hi,
I changed some stuff around that was incorrect, compiled it and all I got when I ran it was The very end of the program. Any other things?
Matt
Matt Millican
http://www.internetmill.com
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Hello,
I have a little problem on re-using a socket after a completed AcceptEx call. The number of maximum clients is equal to the number of sockets in my program. On every socket I made an AcceptEx() call to accept a new connection and receive the data. So far so good. After receiving the data I need a new AcceptEx() call which can receive data from other clients who are trying to connect.
But - something is going wrong! When I simply recall AcceptEx() on the same listener socket and the same accept socket I get an error (WSAEINVAL / 10022L).
Do I have to close the socket before I try to make a new AcceptEx() call on that socket? I would like to re-use this socket and leave it open, because it's queued in a completion port.
I hope you can help me.
Thanks for your attention!
bond006
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Yes, you must close the socket before assigning a new socket to that same variable.
Kuphryn
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Which socket? The listener socket or the accept socket? When I close the listener socket I have no sockets at all! 
bond006
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Hi,
well, you have two possibilities - first is to close the socket before you use the new AcceptEx using the closesocket(). But then you simply destroyed everything and there's no reuse.
Second is to re-use the socket - for this you can use this trick: Instead of calling closesocket() you can use this one:
TransmitFile( sock, NULL, 0, 0, NULL, NULL, TF_DISCONNECT | TF_REUSE_SOCKET )
This will close the socket, but makes it ready for AcceptEx reuse. Works only on NT, but as you wrote you use IOCP, so should not be a problem here
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I am trying to create a multi threaded program.
First I have the thread that the program initializes, but I need another.
The second thread is needed to access memory that is on a PCI card.
I am already able to open the card, but not quite sure how to create a new thread. What include will I be needing?
thanks,
Steven
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That's quite simple!
Try something like this:
// ------------------------------------------------------
#include <process.h>
UINT threadID;
unsigned WINAPI ThreadFunc(LPVOID param);
void main()
{
CPCICard pPCICard = new CPCICard();
_beginthreadex(NULL,0,ThreadFunc,NULL /*that's the parameter for the ThreadFunc*/,0,&threadID);
DoSomeWorkBlablabla();
delete pPCICard;
}
unsigned WINAPI ThreadFunc(LPVOID param)
{
DoSomeThreadWork();
RunningLoop();
return 0;
}
// ---------------------------------------------------
I don't know whether I helped you or not, but when you call _beginthreadex the ThreadFunc function is called and then two threads running on the same time, doing different things.
bond006
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Sorry for the newbie problem, but I've been struggling with this for awhile. Do I need to set Directories (tools/options/Directory tab) differently than default?
My Error Message:
error C2065: 'sin' : undeclared
identifier
Excerpt of code:
#include math.h (greater than,less than signs)
double ken;
double j = 3.14;
ken = sin(j);
What's confusing is that the IDE seems to recognize sin (shows the function prototype)
Thanks for any help - Ken
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If you right-click on the #include < math.h > statement and select Open Document, does that work? Is the sin() prototype found in the file?
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Thanks for your help.
I discovered that by moving the #include from the .cpp file to the .h file, this made VC++ happy. I'm not sure why it wouldn't "see" math.h from the .cpp file...but I'm happy that it works... and I suppose the .h file is the more organized place for the include.
/KL
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either you're messing around with precompiled headers (everything befoer stdafx.h is basically ignored), with namespaces, or maybe you do use sin() in a cpp file that didn't have the #include.
For the "more organized place":
- includes used in most files go into stdafx.h (append at bottom)
- other includes go into .cpp unless they are needed in .h, or by files that include that header.
"Der Geist des Kriegers ist erwacht / Ich hab die Macht" StS
sighist | Agile Programming | doxygen
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If your working on aproject with precompiled headers, the compiler will ignore all statements upto the
#include "Stdafx.h"
line, so if you had #include math.h before this line it would have been ignored, it has to be after that line and then all would be ok.
Roger Allen
Sonork 100.10016
Were you different as a kid? Did you ever say "Ooohhh, shiny red" even once? - Paul Watson 11-February-2003
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Hiya I am writing records of lenght 100 in a file. I was just wondering when am I meant to use carriage returns and line feeds?? What is the advantages of putting them into ur files??
Is this a line feed = '\n' and is this the carriage return = '\r'??
So it would be:
char *line = "hello\r\n";
Also what is the difference between stream and ostream??
Thanks.
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grahamoj wrote:
Hiya I am writing records of lenght 100 in a file. I was just wondering when am I meant to use carriage returns and line feeds?? What is the advantages of putting them into ur files??
There's no advantage per se. It's just a convenient way of delimiting the lines. Most, if not all, text-type controls treat the CR/LF characters appropriately, otherwise you could use any delimiting character but would have to convert that character to something else before displaying the data.
grahamoj wrote:
Is this a line feed = '\n' and is this the carriage return = '\r'??
Yes.
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stream can be closed and then reopened so you can use it for input and output. As a result, there is no default argument, whereas an ostream always knows it is being opened for output.
Christian
NO MATTER HOW MUCH BIG IS THE WORD SIZE ,THE DATA MUCT BE TRANSPORTED INTO THE CPU. - Vinod Sharma
Anonymous wrote:
OK. I read a c++ book. Or...a bit of it anyway. I'm sick of that evil looking console window.
I think you are a good candidate for Visual Basic. - Nemanja Trifunovic
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grahamoj wrote:
I am writing records of lenght 100 in a file.
If you know that your records are of length 100, then there is no reason to add CR/LF as a delimeter. In fact, there is no reason to delimit records of a fixed length.
If this is a binary file (holding just data for a program to read/write/process) then there is no need for CR/LF. If this is a text file that a person may want to look at, then CR/LF is nice to keep the lines separate, but only for someone to look at. If the file is text but is meant only for a program, then CR/LF isn't necessary.
Dave
"You can say that again." -- Dept. of Redundancy Dept.
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For some reason, the "format selection" is always greyed in the edit menu.
any thoughts ?
Maximilien Lincourt
For success one must aquire one's self
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Smart indenting is not turned on.
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I've found some stuff here and elsewhere on how to get the IP address of each adapter card in your system. The problem is that I want to display the adapter's name and IP Address in a combo box so the user can select which one he wants to use. e.g. "3Com EtherLink 10/100 PCI TX NIC (3C905B-TX) at IP address: 184.23.22.101"
I have been unable to find an API or call that would correlate the two to each other. The first can be obtained in the registry in various locations depending on whether OS is Win9x or NT/2000/XP. Of course, it is unsorted in the registry. The second is GetIpAddrTable().
Does anybody know how I can get the same information and correlate it to each adapter card? BTW, I know how to detect dialup adapters (0.0.0.0) and don't display them. However, ironically, the 0.0.0.0 can be used for DHCP enabled adapter cards so there doesn't seem to be a way of getting the IP address of the card from the registry. Thus, the dilemna, I can get IP address from API calls but not in the registry. I can get adapter card device description from the registry but not the IP address.
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Can you use GetAdaptersInfo()? This will give you the name of each adapter and the IP addresses it uses. Cross-referencing on either would be easy.
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Thanks for your response. I did try that but the DeviceDescription I read in the registry does not exactly match what's returned in GetAdaptersInfo(). For example, here are my adapters DeviceDescription field read in the registry:
"3Com EtherLink 10/100 PCI TX NIC (3C905B-TX)"
"3Com 3C920 Integrated Fast Ethernet Controller (3C905C-TX Compatible)"
But, GetAdaptersInfo() only returns one of the adapters (one is probably no longer in my docking station):
"3Com Etherlink PCI"
Not an exact match. Though I could just search for "3Com Etherlink" how do I know how much of the string should I be looking for. I mean, if I did have my 3Com 3C920 controller still installed, would GetAdaptersInfo() return "3Com 3C920" or would it change it somehow, possibly "3Com 3C920 PCI"? I guess it could be done but I was hoping for an exact match returned from GetAdaptersInfo() or some other API call.
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From what I can tell, GetAdaptersInfo() probably gets the name from the device driver itself. It first consults the registry to get the GUID, then cross-references that to get the name of the device driver file. This is just a guess based on my test app's registry access. As it did not obtain the name directly from the registry, I can only assume it used the device driver file.
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If one or more resource IDs in a DLL are the same as what is in an MFC application that is being developed, will there be a problem?
The DLL is being loaded at run-time and there is a resource header being linked into the main application.
SJ
Manufacturing Software Developer
Hewlett-Packard Company
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