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POIs there a maximum number of calculations that can be performed by a program before it stops working?
 

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  1. POIs there a maximum number of calculations that can be performed by a program before it stops working?
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    <p>My apologies for the general nature of this question, but I cannot think of a good way to word it... Put simply, I'm a beginner that's written a program (in C, using CodeBlocks-EP) that performs a very large number of calculations (for simplicity, I've replaced the real (very useful) code with a pointless loop that also has a large number of calculations!).</p> <pre><code> int x, i; for (i=0; i&lt;9999999999999999; i++){ x=x+1; x=x-1; //real code is much more useful but spans 3000 lines! } printf("x is %i", x); //useful output </code></pre> <p>As I said, it works fine, and gives useful output. However, recently, I tried to make it run once for every day of a virtual year, rather than for just one day, like the following:</p> <pre><code> int x, i, day; for (day=0; day&lt;365; day++){ for (i=0; i&lt;9999999999999999; i++){ x=x+1; x=x-1; //real code is much more useful but spans 3000 lines! } } printf("x is %i", x); //useful output </code></pre> <p>and I received the following message before I get useful output:</p> <p><strong>My_program</strong>.exe has stopped working. A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available. Process terminated with status -1073741510 (24 seconds).</p> <p>On further inspection, it stopped working around day 60. HOWEVER (and here's the weird part...), the program works if you choose a smaller period, e.g. for days 0-60, OR days 30-71, or days 60-101 (so it is NOT breaking because of a programming issue with day 61).</p> <p>If I try to do more than around 60 days though (even days 0-70), it breaks after about 60 days. I can't think of anything wrong other than the fact that it is breaking due to "too many calculations"... But I've never heard of that problem. I'm a bit of a newbie, so any advice would be greatly appreciated here!</p> <p>I appreciate that it is unhelpful to not have the actual code, but at 3000 lines, it seemed sensible to replace it with something simpler! But I can confirm that it works for each individual day of the year, when ran as separate individual days... Just not as a block! If I can help by providing any other information, please let me know.</p> <p>Many thanks,</p> <p>Matt</p> <p>Update (23:21 26/12/2013): Thanks a lot for all the responses- turned out it was a memory leak and I'd missed a line of code resetting one of the counters, which in turn tried to then make a giant matrix... Sorry for being a noob and not knowing how to diagnose it, but I feel like I've learned something; thanks for the help!</p>
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    1. USRobert Harvey
    1. USuser3137437
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    1. CO`i` will cry for `9999999999999999`!
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      1. POIs there a maximum number of calculations that can be performed by a program before it stops working?
      1. UShaccks
    2. COThere is no "too many calculations" error. You're probably leaking memory somewhere.
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      1. POIs there a maximum number of calculations that can be performed by a program before it stops working?
      1. USElliott Frisch
    3. COI'm very worried that someone who is responsible for a 3K-line program doesn't know how to debug problems like this.
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      1. USBarmar
 

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