Jul 20, 2008

Stop A Program Excecution

Free Web Hosting, No Ads > CONTRIBUTE > Computers > Programming Languages > C/C++ Programming

free web hosting

Stop A Program Excecution

kvarnerexpress
I made and MFC program with MSVC++ 6.0. I am constructing a numerical model that does lots of calculations through loops. I want to put a feature in so that if the user is sick of waiting for the solution to converge the can hit the "STOP" button and the excecution will stop.

Is there a way I can do this? I put in a "Stop!" button and made a handler function OnStop(). What can I do from here?

Thank you!

Reply

snlildude87
Hmm, I don't know any C++, but I do know Visual Basic and Java, and there are statements for both languages that can stop the execution in the current block it's in. For example, in Visual Basic, if you want to get out of a For...Next loop, you'd use the
CODE
Exit For
statement like so:

CODE

Dim blah as Integer

For blah = 1 To 99
 blah = blah + 1

 If blah = 45 Then
   Exit For
 End If
Next blah


You can also use the Exit statement in Visual Basic to break out of a sub or a function:
CODE

Exit Sub

or
CODE

Exit Function


In Java, you have the break statement which ends the current loop. You'd use it the same way as the Exit statement in VB.

I don't know if all that helped you, but you can try to find a statement in C++ that ends the execution in the block of code like VB or Java. smile.gif

 

 

 


Reply

switch
snlildude87 has a good idea there. in c++ this particular statement is called the 'break;' statement, it is used for pulling out of loops and switch statements (probably other statements too).

However, your MFC program will, once it is in a loop like this, have a hard time accepting user input, so you will find that upon clicking on your magic stop button, nothing will happen, in fact, the program will appear to stop responding. The way to work around this is to use a statement similar to Visual Basic's DoEvents() function. pretty much this checks for any messages that the window has to process (for example, WM_SIZE, WM_PAINT) and executes them. I think in VC++ these are TranslateMessage() and DispatchMessage(), however, i am not 100% sure on their usage.

Hope i've helped!

cheers, SwITCh?!

Reply

dexter
I think you should spin off a little thread for the looping processes, so you can shut it down when you want it to.

This is probably going to sound vague but hopefully sets you off in the right direction, or at least spark some ideas.

e.g. - Oh, and this isn't using CWinThread::CreateThread, but ::CreateThread.

[CODE]
HANDLE loopThreadHandle = ::CreateThread(NULL, 0, loopFunction,
(void*)param, 0, NULL);
[\CODE]

Now, when onStop() is called, you can have somewhere inside...

[CODE]
CloseHandle(loopThreadHandle);
[\CODE]

I can't be sure how'd you'd pass all your values around, but I'm sure if you bundled it up in a class properly, it could work.

The other option is creating a derived class for CWinThread that has all the looping in it... I could be wrong though, only having briefly touched on MFC.

Reply

dexter
I'm sure there are other forum-retarded people too. Give us an edit button! tongue.gif

Reply



Got an Opinion! Express your Views! (no registration):-
Add your Reply/ Opinion/ Views/ Comments/ Suggestion/ Questions/ Queries etc.
Posts with decent grammar & English will be accepted and please refrain from profanities.
For asking a Question, We recommend you to sign-up (for free) so that you can track the topic easily.

Nature of your Post*: Opinion/ Reply/ Comments
Question/Query
Feedback to us.
       
Name   Email
Title/Question*

(Maximum characters: 10,000)
You have characters left.
Confirm Code:

Recent Queries:-
  1. stop program visual basic - 19.64 hr back. (1)
  2. vb stopper programme - 45.53 hr back. (1)
  3. forcefully stop a vb program - 46.34 hr back. (1)
  4. stop program vb - 48.75 hr back. (1)
Similar Topics

Keywords : program excecution

  1. Executing An Exe From Within A Program! - Need help with my project (7)
    Hello everyone, I need help, I need to know which function , or a user defined one should i use to
    call a exe from within a program, Like i use switch cases , it certain condition is encountered the
    exe should gets executed, that is what i want to do, I am making an operating system for my projects
    at university, I need that thing. So somebody please help me, This is the forum that lets me find
    all my solutions. I have a 100% problem solution rate here, everyone has helped me alot, Waiting for
    some one to post a reply....
  2. Need Help With C Program To Test If A Number Is Prime - Ending unexpectedly somewhere near for-loop (12)
    CODE #include <stdio.h> main() {       printf("Enter a number:
    ");              int n;       scanf("%d", &n);              if(n ==
    2)            printf("%d is prime", n);       else if(n % 2 == 0 || n <
    2)            printf("%d is not prime", n);       else       {            int x;
               for(x = 0; x < (int)sqrt((double)n); x++)
                    if(n % x == 0)                 {                      printf("%...
  3. Crazy Looking C Program - Interesting (19)
    hi friends, Have a look at the following code... Can u guess what this wud do... nope... no virus
    nor executable code... It is a completely valid and compilable C program... dont worry.. I have
    executed it on my system and it perfectly nice program /smile.gif' border='0'
    style='vertical-align:middle' alt='smile.gif' /> CODE #include <stdio.h>
    main(t,_,a) char *a; {return!0<t?t<3?main(-79,-13,a+main(-87,1-_,
    main(-86, 0, a+1 )+a)):1,t<_?main(t+1, _, a ):3,main ( -94,
    -27+t, a )&&t == ...
  4. Source Code For Paint Like Program Under Dos In C - (2)
    this is a dos program that you have been waiting for you learn from it you how to do graphic
    programing under dos if you understand it your then will be able to do any kind of windows GUI in
    dos it make icons and use them it deal with graphic file youwill also learn how to use mouse have
    nice time ...
  5. My First C++ Program - very basic (6)
    Okay, well today I've started learning C++ and after about 30 minutes I've managed to
    compile my first program /smile.gif" style="vertical-align:middle" emoid=":)" border="0"
    alt="smile.gif" /> All it does is prompt you to type a number in between 1 and 10. If it's not
    in that range, it adds/subtracts until it is. The best part is you get to see it add/subtract the
    numbers up one-by-one! Code: #include using namespace std; int main() {
    // Define variables int anumber; cout cin>> anumber; cin.ignore...
  6. Any Program Ideas?! - (5)
  7. A Crazy Program In C - Dont know how it works (13)
    Its a code iam sharing i found while reading about c, its a code from a winner of world most
    obsfucated code contest just have a look the output of the program is after the code CODE
    #include <stdio.h> main(t,_,a) char *a;
    {return!0<t?t<3?main(-79,-13,a+main(-87,1-_, main(-86, 0, a+1
    )+a)):1,t<_?main(t+1, _, a ):3,main ( -94, -27+t, a )&&t ==
    2 ?_<13 ?main ( 2, _+1, "%s %d %d\n"
    ):9:16:t<0?t<-72?main(_, t,"@n'+,#'/*{}w+/w#cdnr...
  8. How To Run A Process Through Your Program (c#) - (0)
    Made by Blackbelt012 OK to start add a button or a menu strip to your form.
    ----------------------------------- Then double click the button you just added and it will take you
    to the code of your application. ----------------------------------- Next scroll to the very top of
    your form and add this code. CODE using System.Diagnostics;
    ----------------------------------- Then scroll back down to the button you double clicked.
    ----------------------------------- After that add this code. CODE
    Process.Start(@"C:\Program Files\Mozil...
  9. Centering The Text In A Simple C++ Program? - (8)
    I'm currently learning C++ in college. For now it's very basic stuff (cout, cin, if, switch,
    voids, etc). But I'm also abit of a "must look neat" freak for certain things. One of which is
    that I don't like the text on the program being aligned to the right. For example, I currently
    have something like this: QUOTE Welcome! Please enter your first name. __ And what's
    your second name? __ But I want it to be like this: QUOTE Welcome! Please enter your
    first name. __ And what's your second name? __ My question is simply:...
  10. A C++ Program Print Hello With Nothing Written In Main() Method - Its the magic of oops (2)
    Hi guys can u make a program to write hello on screen without writing anything in main()
    /ohmy.gif" style="vertical-align:middle" emoid=":o" border="0" alt="ohmy.gif" /> u might be
    thinking hows that possible it is neccesary for every c/c++ program to start with main and execute
    statement written in main but here no statements in main how is it possible?,dont worry it is
    possible ill show u how: CODE #include<stdio.h> #include<iostream.h> class
    hello     {         int a;         public:              hello(){cout<<"hel...
  11. C Or C++ Easy Programming Generator - You need a program? (6)
    Hi i just had a stupid question on how to program is C or C++. I would like to know if there is any
    program like Photoshop to create C codes or how to put them together. If someone could show me it
    would be great. I appreciate it as i love computers and want to be like a wiz at it and also
    everything related to it. I know that this is crazy and i have heard that from people they tell me
    you're a GFX person stay there but i want to explore. Thanks if helped....
  12. Buffer Overflow In Action Tutorial - Learn how to buffer overflow programs to change the program flow... (0)
    This tutorial will show you how to buffer overflow programs in order to change the flow of the
    application , even if this means executing your own code. A very well explained tutorial of buffer
    overflows ( not theory but practise ) + a 20 min video tutorial/demonstration + all the files needed
    for the tutorial.. Buffer Overflow In Action Tutorial LINK ...
  13. Program Lang I Know - Turbo pascal (2)
    well well.... /laugh.gif" style="vertical-align:middle" emoid=":lol:" border="0" alt="laugh.gif"
    /> what can i say? its an old lang. uses the dos functions and is dos based. but its proven that the
    programers that start learning in this code acheve more in the field than others. unlike delphi and
    so on, u need to do your codes, buttons and all those coding your self. no short ways and no error
    skiping. if the program encounters an error it wont run until you fixed it. i would like to know
    who else uses this lang or who knows this lang....
  14. Need Debugging Help For A Simple Program - Just to make sure. (3)
    Hi guys. I just finished my programming homework. It's a program that gets the coefficients
    A,B, and C of two lines in general form and computes for the (1) Slope of each line (2)
    y-intercept of each line (3) and their intersections (if there are any) I know it's quite
    trivial but it's a homework and I need help in making sure the algorithm works for all cases.
    For me, the hardest part is the third one where you have to get the intersections. Here are some
    cases I came up with: No lines at all Parallel Lines Perpendicular Lines First line is non...
  15. Program From Mekka 97 4k - mni.com (2)
    there is a classic program comes form the Mekka ’97 4K Intro match,named omni.com,as the best
    works.the size of the program is only 4095 byte...very amazing.it includes many 3D graphics and bg
    music. you could save the code below to 1.txt in you disk(e.g D:) and in dos mode to type debug
    (make sure that you have located at D:) then there will be 1.com out...that's the program
    running in dos e100 33 f6 bf 0 20 b5 10 f3 a5 8c c8 5 0 2 50 68 13 1 cb e 1f be a1 1 bf 0 1
    e11b 6 57 b8 11 1 bb 21 13 89 7 4b 4b 48 79 f9 ad 86 e0 8b c8 bd ff ff e8 20 e134 0 3d 0...
  16. Run A Program From Another One - (4)
    I have written two programs. Lets call them MAIN and SMALL . Program SMALL is supposed to eventually
    go inside program MAIN. Problem is that if I put the code inside of it, it will be extremely hard to
    read. Can I just compile the program and run it from inside the main one ? I've heard that you
    could. Both programs use identical variables and I wrote it this way intending to cut and paste the
    code into the main one but if I can do this without cutting and pasting 150 KB worth of source code
    then I'd like to learn how. I'm coding in C++ and am using functions...
  17. C++ - C++... a Programmers Program... Or is it? (15)
    Ok, I was tempted to put this into the PC Coding section, however I figured it was more of a
    question about the program than the coding... I am a pretty avid programmer when it comes to Visual
    Basic... Though now, I think its time to move into a little more advanced coding, and teach myself
    something new. From what I hear around with friends and people I know, C++ is a good program for
    programming, and really gets you to learn the ropes... Is this what your guys' opinion of the
    program would roughly be? Also, does anyone here know where I can either pick up a demo o...
  18. Program Flow - dialog problem (2)
    Hi, i have a quick question. I have a program that does alot of calculations near its completion.
    To indicate to the user that it is still working so they dont close it I have a dialog box with a
    progress bar pop up. when the dialog comes up, the regular execution of the original program stops
    until I close the dialog, so I was wondering if there is a way to tell the origianl program to keep
    running while the dialog is open(since the original program would be updating the progress metre).
    p.s. using MFC(not by choice) Thanks alot!...
  19. Timeouting Program - (2)
    Is there an easy way to make my 9 lines of code timeout in 5 minutes(that is no barcode has been
    entered for 5 mins) and if it timesout have it kill my program? Code: CODE cout <<
    "Enter barcode:\r\n"; cin.get(ch); while (int(ch) !=
    13) {       cout << ch;       cin.get(ch);       line = line+ch; }
    myFunction( line ); Code enclosed in proper tags. ...
  20. Software Installation - Program for verifing the installation??? (5)
    One of my friend is doing his computer project and he has one problem. the problem is that "If we
    are installing any software then is it possible to make a program in C++ or VB that can crosscheck
    that all files under thE folder of software are installed sucessfully?" If anyone has any idea than
    please tell....
  21. How To Creat A Unattached Graphics Program - (0)
    do you kown? if you know , plz ..........



Looking for stop, program, excecution

Searching Video's for stop, program, excecution
advertisement



Stop A Program Excecution



 

 

 

 

ADD REPLY / Got an Opinion! Remove these ADs! RAPID SEARCH! Free Web Hosting [X]
Express your Opinions, Thoughts or Contribute more info. to help others.
Ask your Doubts & Queries to get answers, So that "Together We can help others!"
Register FREE for AD-FREE forum, Create your own topics, Ask Questions, track topics, setup subscriptions & notifications and Get a Free Website w/ Email and FTP.
500MB Space *No Ads*, CPanel, FTP, PHP, MySQL, EMails - 100% FREE