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Thank you a lot.
You're right, the calculation part is the only part that I must optimize 'cos do it in the others is just a waste of time.
What profiler do you use?
Best Regards
Dr.Pi
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Recently, I have been using the Intel VTune performance analyzer. The version that I use supports Visual C++ 6.0. I typically use it to do time-based sampling, where the program collects samples of where the program is executing at a regular time interval.
It works Ok for my usage, but I find that sometimes I need to make calls into the profiler API so that I can isolate just the sections of code that I want to profile. I mostly work on a CAD application where most of the CPU time is spent idling (waiting for user input), so I only turn on the profiling once the user is done with whatever selections they need to make. These calls aren't necessary, but make it easier to figure out the sections that actually need improvements (by removing clock ticks for user idle from the profile data).
If most of the time spent in your program is doing calculations, you probably won't need to do these API calls, as the user input time will still be just a small percentage of the total time. If you don't add these calls, you can profile your program without needing to make any changes. If you add these calls, it only requires minor changes to your program.
Best regards,
John
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Short of experience and program design, the only guidelines would be to not use float/double (use int/long) instead, avoid division wherever possible, and attempt to precompute values into tables at the start of your program, and doing simple calculations of the individual items against the precomputed values, rather than making complex calculations 20000000000 times.
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I've been struggling with an error message that prevents me from initializing the CPoint member (adk) of my structure. As a test, I discovered that my own Point structure worked fine.
What am I doing wrong...surely one can conveniently initialize a CPoint structure???
Excerpt of my Code:
typedef struct {
int x;
int y;
} MyCPoint;
struct s_Door{
MyCPoint InsertionPt;
int iPline;
int iEach_Pline[1];
int iVert;
MyCPoint Vert[5];
CPoint adk;
}
Door =
{
{0,0},
1,
{5},
5,
{-15,0, -14,2, 13,15, 15,13, -15,0},
4
};
Error message:
'Door' : non-aggregates cannot be initialized with initializer list
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Add brackets.
Door = {{0,0}, 1, 5, 5, {{-15,0}, {-14,2}, {13,15}, {15,13}, {-15,0}}, 4};
Kuphryn
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Thanks for your help, but this still gives the same error message. In fact, this very simple code results in the same error message???
struct s_Desk{
CPoint adk;
} Desk = { 0,0 }; //I tried { {0,0} } as well.
error C2552: 'Desk' : non-aggregates cannot be initialized with initializer list
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CPoint cannot be initialized with an initializer list probably because it has one or more constructors, and has a base class.
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OR:
typedef struct {
int x;
int y;
} MyCPoint;
struct s_Door{
s_Door();
MyCPoint InsertionPt;
int iPline;
int iEach_Pline[1];
int iVert;
MyCPoint Vert[5];
CPoint adk;
}
s_Door::s_Door() : InsertionPt( 0, 0), iPline( 1 ), ... adk( 0, 0 )
{
// anything you want to addd....
}
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I want to small project so I can share some data, printer, ...etc. But I don't know VC++ support fuction or ActiveX object for parallel port. please help me.
Thank and Best regards!
The child learn to program
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Here is one solution from MSDN.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnfiles/html/msdn_serial.asp
Kuphryn
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Hi,
I have implemented an FTP application, which will schedule itself to run daily by using SetTimer, once it’s started. Everyday it will FTP-get a plain text file from a remote server using MFC classes CInternetSession and CFtpConnection.
The plain text file’s name will be the same, but the content is updated daily. The problem I’m having is the first time I start the application, it gets the text file of that day, but then it will get the same file, even though the content of the remote file has already been updated. It seems like the file is cached somewhere. If I stop the application and re-start it, again it will be fine the first time.
The code is below:
CInternetSession session(_T("DBAdmin"));
CFtpConnection* ftp;
session.SetOption (INTERNET_OPTION_CONNECT_TIMEOUT, 30000);
session.SetOption (INTERNET_OPTION_CONTROL_SEND_TIMEOUT, 30000);
session.SetOption (INTERNET_OPTION_CONTROL_RECEIVE_TIMEOUT, 30000);
session.SetOption (INTERNET_OPTION_DATA_SEND_TIMEOUT, 30000);
session.SetOption (INTERNET_OPTION_DATA_RECEIVE_TIMEOUT, 30000);
try
{
ftp = session.GetFtpConnection (strIP, strLogin, strPwd, iPort);
if (ftp)
{
if (!ftp->GetFile (strSrc + strFileName, strDest + strFileName))
}
}
Is this a setting problem or a programming one?
Thanks in advance.
Tony
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I suspect there is a problem on the server side. The server may not be updating its data relative to the actual file. In other words, the server is no aware that the file has changed.
Kuphryn
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When you construct the CInternetSession object, pass the flag INTERNET_FLAG_DONT_CACHE as the Flags parameter:
CInternetSession session(_T("DBAdmin"), 1, INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, INTERNET_FLAG_DONT_CACHE);
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I just downloaded SP5 from msdn and I choose the multi-part download. So I have 11 files numbered 1 to 11 this is the SP5 core, no problem with those.
There are aslo 3 files called vs6sp5s1.exe, vs6sp5s2.exe and vs6sp5s3.exe. When I unpack them they are full of headers, .lib and so. I don't know how to install those files, should I unzip them in the same folder as the SP5 core. It seems odd to me as SP5 is mainly composed of CAB files when the 3 others are a bit messy.
Any info someone ?
Thnak in advance 
Yarp
http://www.senosoft.com/
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Just for yor information, you need to unzip all files into one folder and then run the Setup.exe that came with the 1st cab file.
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Thanks for the answer
Now, I will proceed.
Yarp
http://www.senosoft.com/
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Hi guys
I've read the following optimizations switches
/G5 Optimizes for Pentium processor.
/G6 Optimizes for Pentium Pro processor.
But exists some newer switches to optimize for Pentium III or Pentium 4 processors?
Best Regards
Dr.Pi
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I'm downloading.
I have some questions.
What happen if you run this code in an AMD processor?
Best regards
Dr.Pi
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How to check if bit STORE_RTF_OK is set in message store provider?
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Call the message store's GetProps() method to retrieve the PR_STORE_SUPPORT_MASK property. Then check the STORE_RTF_OK bit.
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if ((pPropVal->Value.l & STORE_UNCOMPRESSED_RTF) == STORE_UNCOMPRESSED_RTF)
will get it.
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Which is incorrect. The expression (pPropVal->Value.l && STORE_UNCOMPRESSED_RTF) evaluates to 1 so of course the whole condition is TRUE. To AND two values, you need to use the '&' operator.
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Have you tried printing the hex value of pPropVal->Value.l? It'll show you what bits are set and what bits aren't.
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dec: 145405
hex: 237FD
bin: 10 0011 0111 1111 1101
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