infinite-loop | 易学教程

Stopping an infinite loop in C++ when key is pressed [duplicate]

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问题 This question already has answers here : How to detect key presses in a Linux C GUI program without prompting the user? (4 answers) Closed 5 years ago . I have a program as given below: #include<iostream> using namespace std; int main() { while(true) { //do some task if(Any_key_pressed) break; } return 0; } how can exit from the loop if any key is pressed. C++ Compiler: GCC 4.2 and higher OS: Linux-Mint Thanks 回答1: Standard C++ doesn't offer a way to do this. You will need a platform-specific

Infinite loop using AndroidKeyStore authentication

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问题 My application enters an infinite loop when I use the AndroidKeyStore requiring user authentication to use the keys .setUserAuthenticationRequired(true); .setUserAuthenticationValidityDurationSeconds(60); It is assumed that an operation that uses a user's private key requires that the device has been unlocked, otherwise a UserNotAuthenticatedException is generated. The app must present the device authentication screen, and the next usage of the key will work. But, in my case always is thrown

How can I detect elapsed time in Pascal?

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问题 I'm trying to create a simple game in Pascal. It uses the console. The goal in the game is to collect as many 'apples' as you can in 60 seconds. The game structure is a simple infinite loop. Each iteration, you can make one move. And here's the problem — before you make the move ( readKey ), time can pass as much as it wants. For example, the user can press a key after 10 seconds! Is there any way to count time? I need the program to know when user plays (before and after a key is pressed),

How is this causing an endless loop?

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问题 Some legacy code I'm stuck maintaining is stuck in an infinite loop (and thus I myself seem to be in one); I can't figure out why/how, though. Here's the app's entry point, where it instantiates the main form (frmCentral): CODE EXHIBIT A public static int Main(string [] args) { try { AppDomain currentDomain = AppDomain.CurrentDomain; currentDomain.UnhandledException += new UnhandledExceptionEventHandler(GlobalExceptionHandler); string name = Assembly.GetExecutingAssembly().GetName().Name;

How to wrap around in PHP array when index falls off the end?

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I want to be able to retrieve the value of an array by using the numeric key. The catch is that if the key is beyond the array length, I need it to loop through the array again. $my_array = array('zero','one','two','three','four','five','six','seven'); function loopArrayValues($array,$key){ //this is what is needed to return return } echo "Key 2 is ".loopArrayValues($my_array,2)." "; echo "Key 11 is ".loopArrayValues($my_array,11)." "; echo "Key 150 is ".loopArrayValues($my_array,11)." "; Expected output: Key 2 is two Key 11 is three Key 150 is three My research references:

Killing OpenCL Kernels

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Is there any way to kill a running OpenCL kernel through the OpenCL API? I haven't found anything in the spec. The only solutions I could come up with are 1) periodically checking a flag in the kernel that the host writes to when it wants the kernel to stop, or 2) running the kernel in a separate process and killing the entire process. I don't think either of those are very elegant solutions, and I'm not sure #1 would even work reliably. Eric Bainville No, the OpenCL API doesn't allow to interrupt a running kernel. On some systems, a kernel running for more than a few seconds will be killed by

Hudson infinite loop polling for changes in Git repository?

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问题 The git plugin for hudson works well. However, the build script must update a version number in the files in the repository, commit, and push back to the repository. When Hudson polls next to check for changes, it goes into an infinite loop because it sees that commit as a "change" builds again, which commits a change, so it builds again, then it commits another change, etc... You get the idea. I stopped it, ran a "git log" in each repository and compared the latest commit ids are exactly the

Flexslider infinite loop is not working

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I was looking all over the web there is a very known issue with Flexslider either with the slider or the carousel when it gets to the last item in the slider it flys back to the first one instead of keeping the infinite loop smoothly I can't believe no one has a solution for that this is the flexSlider code I am using: $(document).ready(function() { $(window).load(function() { $('#carousel-two').flexslider({ animation : "slide", controlNav : false, animationLoop : true, slideshow : true, itemWidth : 234, itemMargin : 20, minItems : 3, maxItems : 5 //asNavFor : '.flexslider' }); }); }); No

jQuery: Infinite loop that doesn't crash the browser

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I was wondering if it was possible to create an infinite loop which does not crash the browser I am working on a gallery type thing which will pulse as it scrolls across the screen. This is what I have so far (which obviously crashes the browser): var i = 0; while (i < 1){ $('.block').each(function(index) { $(this).css('left', $(this).position().left - 10) if (($(this).position().left) < ($(window).width() * 0.4)) { $(this).html('Test 1'); $(this).animate({ width: "500px", height: "500px", }, 500 ); }else if (($(this).position().left) < ($(window).width() * 0.2)) { $(this).html('Test

Stack Overflow error vs. Infinite loop

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I know what an Infinite Loop error is. Is a stack overflow error the same thing. If not, what is the difference? Can you give example code as well? If, instead of infinite loop, you have infinite (or very deep) recursion (function invoking itself), then you will get stack overflow. Whenever a function is invoked, some part of stack memory is consumed. Once all the stack is exhausted, you get - stack overflow error. These are not the same thing. Infinite loop error is dealing with iterative loops (no recursion), where as most stack overflow errors are dealing with recursion. You should google