Ackermann Function - C / C++ / MFC Discussion Boards

Re: is there a way to run programs with other programs?

jmkhael4-May-04 5:01

jmkhael

4-May-04 5:01

Hint:
FindWindow
SendMessage
Spy++

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: is there a way to run programs with other programs?

jetournier5-May-04 2:37

jetournier

5-May-04 2:37

thanks but: findwindow and sendmessage can't work (I think) as I can't access the source code of the program I want to run(I want to run it with a program but the way a user could run it, and modify comboboxes choices, click on button...).

I'm not familiar with Spy++: I just made a few search on google as you recommended it, but it seems to show the threads that are running on the PC, the UC occupation and all this stuff so I don't understand the link with my question, could you precise your hint?

Thanks

Re: is there a way to run programs with other programs?

jmkhael5-May-04 2:41

jmkhael

5-May-04 2:41

You dont need source code.
Using Spy++ you can get the class of the window u want to send message to and the messages to send,
using FindWindow you cant get a handle to the window, and using SendMessage you just send the message you saw in Spy ++ to the window, thus making it behave just like if a user is testing it

Consider also using CWnd::Attach and CWnd::Detach

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

capturing message from app2

pnpfriend4-May-04 4:57

pnpfriend

4-May-04 4:57

Hello.. All
I have my application and the application 2. app2 sends the window messages and I don't know how to capture those messages. I'm using .Net c++ and the following example was provided by app2.
My application is Dialog-based application.. and I don't know how to convert the following code or capture the messages from other application at all.

The app2 said register a message ( could be anything) and my application also has to register the same message as app2. (that's I don't know how)
then app2 will start sending messages and my app has to capture and process those messages. ( I have no idea how to capture the messages either)
I kind of have the idea of GetMessage() as it is shown in the example. but how?

<br />
HINSTANCE			hInst;<br />
LRESULT CALLBACK	TestWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);<br />
<br />
int PASCAL WinMain(HINSTANCE hinstCurrent, HINSTANCE hinstPrevious, LPSTR lpszCmdLine, int nCmdShow)<br />
{<br />
 <br />
    WNDCLASS wc;<br />
<br />
    /* Register the window class. */<br />
    wc.style         = 0;<br />
    wc.lpfnWndProc   = TestWndProc;<br />
    wc.cbClsExtra    = 0;<br />
    wc.cbWndExtra    = 0;<br />
    wc.hInstance     = hInst;<br />
    wc.hIcon         = LoadIcon(hInst, TEXT("TestIcon"));<br />
    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);<br />
    wc.hbrBackground = (HBRUSH) (COLOR_WINDOW + 1);<br />
    wc.lpszMenuName  = TEXT("TESTMENU");<br />
    wc.lpszClassName = szMyClass;<br />
<br />
    if (!RegisterClass(&wc))<br />
        return FALSE;<br />
<br />
    // Create the window<br />
    HWND hwndMyWindow = CreateWindow(szMyClass, TEXT("Black Ice printer Driver Message Capture Sample"),<br />
                                WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT, 0,<br />
                                CW_USEDEFAULT, 0, NULL, NULL,<br />
                                hInst, NULL );<br />
<br />
    if ( !hwndMyWindow )<br />
        return FALSE;<br />
<br />
	ShowWindow (hwndMyWindow, SW_SHOW);<br />
<br />
    // Get and dispatch messages until WM_QUIT message<br />
    while ( GetMessage(&msg, NULL, 0, 0 ) )<br />
    {<br />
        TranslateMessage(&msg); // translates virtual key codes<br />
        DispatchMessage(&msg);  // dispatches message to window<br />
    }<br />
    return (int) msg.wParam;    // return value of PostQuitMessage<br />
}<br />

Thank you very much
you can save my life.

Re: capturing message from app2

Anonymous5-May-04 3:49

Anonymous

5-May-04 3:49

No body can help me???

Thank You CodeProject

gUrM33T4-May-04 4:44

gUrM33T

4-May-04 4:44

I would like to thank CodeProject for announcing me as the winner of the "Favorite MFC/C++ Article of March 2004[^]" competition. I would like to thank my best friend Kamal Sekhon for her continuous support. I would also like to thank Nishant (the editor of my article), Chris Maunder and the whole CodeProject team, AND last, but not the least, I would like to thank all those people who posted their prestigious comments, encouraged me a lot, gave their ideas/suggestions, and of course, rated my article to make all this possible.

Thank you all,

Gurmeet

BTW, can Google help me search my lost pajamas?

My Articles: HTML Reader C++ Class Library, Numeric Edit Control

Re: Thank You CodeProject

jmkhael4-May-04 4:51

jmkhael

4-May-04 4:51

Congrat

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Ackermann Function

pmasknguyen4-May-04 4:24

pmasknguyen

4-May-04 4:24

how i can write Ackermann Function not use recursion

Nothing

Re: Ackermann Function

Jens Doose4-May-04 4:36

Jens Doose

4-May-04 4:36

Sometimes try Google...

http://www.google.de/search?q=ackermann+function+iterative

Especially this:

http://www-i2.informatik.rwth-aachen.de/lufgi2/programmierungWS03/uebungsblaetter/Loesung7.pdf
(Search within the document for "computes the Ackermann function ack(x,y) in an iterative way;").

Finding Mem Usage of another program

tjkrz4-May-04 4:16

tjkrz

4-May-04 4:16

To make a long story short, there's an external program that I have no control over that is consistantly leaking memory. This product is required by our customer, so we must use it. Mad | :mad:

Obviously, this program will cause Windows to run out of free memory if it is run long enough. Is there a way I can see the current Memory Usage of this other program -- like what Task Manager is displaying? I'd like my program to either warn the user or destroy that task if the size gets too large.

Any ideas?

Re: Finding Mem Usage of another program

Joe Woodbury4-May-04 4:23

Joe Woodbury

4-May-04 4:23

Try CreateMemoryResourceNotification()

Also look up "Performance Monitoring" in the SDK documentation. (ms-help://MS.MSDNQTR.2004APR.1033/perfmon/base/performance_monitoring_architecture.htm[^] in MSDN)

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: Finding Mem Usage of another program

Dudi Avramov4-May-04 5:08

Dudi Avramov

4-May-04 5:08

If you have psapi.dll then take a look at Collecting Memory Usage Information For a Process

ShellExecute in VC++

PrashantJ4-May-04 4:07

PrashantJ

4-May-04 4:07

Hi,

I have an executable being invoked from a VC++ code through ShellExecute. After the completing of this executable, I have got a list of jobs to be performed in a sequence.
But when I run this application, ShellExecute will create a different shell and execute the exe (which is as expected) and the list of jobs will also be executed before the completion of the execution of my exe.

eg.
ShellExecute(GetSafeHwnd(), "open", print.exe, params, NULL, SW_HIDE);
task1
task2
task3

I want print.exe to execute first and then go execute task1, task2, task3 in a sequence.

I want to know whether we have any synchronization method which can be invoked just before task1 so that the control will flow in a sequence.

print.exe is executed only thro' ShellExecute().
Either a system() call, WinExec() etc will not work.
Please help me out.

Thanks,
Prashant

Re: ShellExecute in VC++

Jens Doose4-May-04 4:22

Jens Doose

4-May-04 4:22

Use ShellExecuteEx, set the flag member to SEE_MASK_NOCLOSEPROCESS to get the process handle and use WaitForSingleObject on that handle.

Jens

Re: ShellExecute in VC++

PrashantJ4-May-04 21:00

PrashantJ

4-May-04 21:00

Thanks for the reply, that worked!!!

about inline.

vividtang4-May-04 4:02

vividtang

4-May-04 4:02

#include<iostream>
#include<complex>
using namespace std;
inline complex<double>&operator+=(complex<double>&cval,double dval)
{return cval==complex<double>(dval);
}
int main()
{
complex<double> cval(4.0,9.8);l
cval+=1;
cout<

Re: about inline.

Joe Woodbury4-May-04 4:18

Joe Woodbury

4-May-04 4:18

main isn't returning a value; there is no return statement!

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: about inline.

vividtang4-May-04 15:17

vividtang

4-May-04 15:17

but compile will extend the inline that has the retun value

Re: about inline.

Joe Woodbury4-May-04 19:32

Joe Woodbury

4-May-04 19:32

No it won't, except by chance of register values. If you want a function to return a value in C/C++, you have to use the keyword return.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: about inline.

toxcct4-May-04 21:58

toxcct

4-May-04 21:58

hey,
don't confuse an inline woth a macro. An inline functions stays a function. when the docs say the compiler will extend the inline, first, it is not an obligation (it does it only if the function is not very complicated), second, it does NOT copy the content of the function at the calling, it makes an adaptation.

the function :
<font style="color:blue;">inline int</font> my_sum_func(<font style="color:blue;">int </font>iParam1, <font style="color:blue;">int</font> iParam2) {
    return (iParam1 + iParam2);    <font style="color:green;">// Note the return here !</font>
}
 
the calling :
<font style="color:blue;">void</font> main (<font style="color:blue;">void</font>) {
    <font style="color:blue;">int</font> iSumResult = my_sum_func(5, 3);
}
<font style="color:green;">// Note also that there is no return statement in the main function, and it goes same way</font>

the compiler will extend such code like this :

<font style="color:blue;">void</font> main (<font style="color:blue;">void</font>) {
    <font style="color:blue;">int</font> iSumResult = (5 + 3);
}

are you now convinced ?

!!! : Don't forget : the compiler extends inlines functions only if it can, that is not an obligation to it !

TOXCCT >>> GEII power

Problem with std::map insert

ykutanoor4-May-04 4:01

ykutanoor

4-May-04 4:01

I have a application that inserts a CString and CList in a std::map;

In .h file

typedef CList<csplfiletsinfo*, csplfiletsinfo*=""> SplFileTSInfoList;
typedef std::map<cstring, splfiletsinfolist*=""> tagSplFileInfoMap;

tagSplFileInfoMap m_SplFileInfoMap;
In .cpp file

//A vrialble of type SplFileTSInfoList
SplFileTSInfoList *l_SplFileTSInfoList;

//Insert the Key and the List in to the Map
m_SplFileInfoMap.insert(f_crstrUserID,l_SplFileTSInfoList);

But when I compile this I get an error.

error C2664: 'std::_Tree<_Traits>::iterator std::_Tree<_Traits>::insert(std::_Tree<_Traits>::iterator,const std::_Tree<_Traits>::value_type &)' : cannot convert parameter 1 from 'CString' to 'std::_Tree<_Traits>::iterator'
with
[
_Traits=std::_Tmap_traits<cstring,clist<csplfiletsinfo *,csplfiletsinfo="" *=""> *,std::less<cstring>,std::allocator<std::pair<const cstring,clist<csplfiletsinfo="" *,csplfiletsinfo="" *=""> *>>,false>
]
and
[
_Traits=std::_Tmap_traits<cstring,clist<csplfiletsinfo *,csplfiletsinfo="" *=""> *,std::less<cstring>,std::allocator<std::pair<const cstring,clist<csplfiletsinfo="" *,csplfiletsinfo="" *=""> *>>,false>
]

Re: Problem with std::map insert

Jens Doose4-May-04 4:20

Jens Doose

4-May-04 4:20

Well, I guess you would like to map a string to a CList.
If yes, use this:

<br />
typedef CList SplFileTSInfoList;<br />
typedef std::map< CString, SplFileTSInfoList > tagSplFileInfoMap;<br />
<br />
...<br />
<br />
m_SplFileInfoMap.insert( tagSplFileInfoMap::value_type( f_crstrUserID, l_SplFileTSInfoList ) );<br />
<br />

Jens

Re: Problem with std::map insert

Dean Goodman4-May-04 4:28

Dean Goodman

4-May-04 4:28

Your error is because you aren't calling insert properly. I would guess (though it's hard to tell from your code) that you will want to try

<br />
m_SplFileInfoMap.insert(make_pair(f_crstrUserID, l_SplFileTSInfoList));<br />

--Dean

Problem with std::map

ykutanoor4-May-04 4:01

ykutanoor

4-May-04 4:01

Re: Problem with std::map

Paul Ranson4-May-04 10:03

Paul Ranson

4-May-04 10:03

ykutanoor wrote:
m_SplFileInfoMap.insert(f_crstrUserID,l_SplFileTSInfoList);

Try

m_SplFileInfoMap.insert(std::make_pair(f_crstrUserID,l_SplFileTSInfoList));

There are other idioms for inserting into maps, I suggest reading around a bit.

Paul

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