exit

How to run code before program exit? [duplicate]

由 懵懂的女人 提交于 2019-12-28 01:51:26
问题 This question already has answers here : Capture console exit C# (10 answers) Closed 5 years ago . I have a little console C# program like Class Program { static void main(string args[]) { } } Now I want to do something after main() exit. I tried to write a deconstructor for Class Program, but it never get hit. Does anybody know how to do it. Thanks a lot 回答1: Try the ProcessExit event of AppDomain : using System; class Test { static void Main(string[] args) { AppDomain.CurrentDomain

How do I exit a while loop in Java?

由 我只是一个虾纸丫 提交于 2019-12-27 17:06:09
问题 What is the best way to exit/terminate a while loop in Java? For example, my code is currently as follows: while(true){ if(obj == null){ // I need to exit here } } 回答1: Use break: while (true) { .... if (obj == null) { break; } .... } However, if your code looks exactly like you have specified you can use a normal while loop and change the condition to obj != null : while (obj != null) { .... } 回答2: while(obj != null){ // statements. } 回答3: break is what you're looking for: while (true) { if

Which is the Best way to exit a method

由 旧时模样 提交于 2019-12-27 02:06:59
问题 I was looking for the ways to exit a method, i found two methods System.exit(); Return; System.exit() - Exits the full program Return exits current method and returns an error that remaining code are unreachable. class myclass { public static void myfunc() { return; System.out.println("Function "); } } public class method_test { public static void main(String args[]) { myclass mc= new myclass(); mc.myfunc(); System.out.println("Main"); } } 回答1: There is no best way, it depends on situation.

php终止脚本执行（exit、die、return)

由 假装没事ソ 提交于 2019-12-26 01:06:07
终止php的脚本执行，我们可以使用exit，die，return 0x01 exit和die， 当程序运行到他们时，直接退出程序，不在运行 <?php header('content-type:text/html;charset=utf-8'); echo '使用exit前'; echo '<br>'; exit; echo '使用exit后'; ?> 习惯用exit直接退出，不输出内容，用die退出，然后输出一些内容，当然，eixt也可以输出 <?php header('content-type:text/html;charset=utf-8'); echo '使用die前'; echo '<br>'; die('使用die退出程序'); echo '使用die后'; ?> 0x02 return 终止当前页面的执行 <?php header('content-type:text/html;charset=utf-8'); echo '使用return前'; echo '<br>'; return; echo '使用return后'; ?> 0x03 区别 return只是终止当前页面的执行，而exit和die只要运行到他们，整个程序都会结束 比如说他们三个在包含文件使用时 head.php <?php echo '使用return前'; echo '<br>'; return;

How to continue a php script after using exit() / die()

由 不问归期 提交于 2019-12-25 03:12:33
问题 For example i have the following script. in this case i want to get the value of X1 and Y1 but the the exit() is not letting me to do so please help thanks in advance and special thanks to Mark Setchell :P (if he sees this) image link $im = imagecreatefromjpeg("omr.jpg"); for($x=0;$x<100;$x++) { for($y=0;$y<100;$y++) { $rgb = imagecolorat($im,$x,$y); $r = ($rgb >> 16) & 0xFF; $g = ($rgb >> 8) & 0xFF; $b = $rgb & 0xFF; if($r<128 && $g<128 && $b<128){ printf("%d,%d: %d,%d,%d\n",$x,$y,$r,$g,$b);

Difference between exit and kill in C++

由 女生的网名这么多〃 提交于 2019-12-25 01:01:16
问题 I have written a signal handler to handle a SIG , and I want to kill the process if I get too many of it. So, which of the following code is better, or should I use them both? exit(-1); // or some other exit code kill(getpid(), SIGKILL); 回答1: Difference between exit and kill in C++ One difference is that kill function is not specified in the C++ standard library. It is merely specified in POSIX. exit is standard C++. Another difference is that kill(getpid(), SIGKILL) will cause the operating

How to stop a loop by using a word such as “exit” in C++?

由 落爺英雄遲暮 提交于 2019-12-25 00:21:26
问题 So I have a coding assignment to complete, and I am having trouble finishing it. The exact instructions are as follows: To make telephone numbers easier to remember, some companies use letters to show their telephone number. For example, using letters, the telephone number 438-5626 can be shown as GET LOAN. In some cases, to make a telephone number meaningful, companies might use more than seven letters. For example, 225-5466 can be displayed as CALL HOME, which uses eight letters. Write a

Terminate PyQt Application [duplicate]

由 ♀尐吖头ヾ 提交于 2019-12-24 20:24:51
问题 This question already has answers here : Proper way to quit/exit a PyQt program (2 answers) Closed 12 months ago . If the user interacts with the application, for example pressing a button, and the user clicks then on the X button, the application keeps running, but the window closes. How can I fully terminate the application. It’s built using PyQt5. 回答1: Here is a simple "Hello World" example, I copied from the Qt tutorials. It uses sys.exit(...) to exit the application. import sys from

C# WebPages : manage Exit events or quit with no user action server side

由 最后都变了- 提交于 2019-12-24 19:07:13
问题 What is the better solution to manage Exit or Quit events when user exit to other pages with no action?. This event need to be raised only one time and be usefull to delete all temporary files or datas not stored after the abandon of this page. Is a perfect to use as cleaning method server side. Thanks. 回答1: The web is stateless so there shouldn't really be anything to clean up. However, sometimes you may want to kill the session when the user tries to close browser. I guess you could catch

Why should I not use exit function in C? [duplicate]

由 ▼魔方 西西 提交于 2019-12-24 14:20:34
问题 This question already has answers here : Should we use exit() in C? (7 answers) Closed 4 years ago . I've been making some school project and I've used this function for error outputs: void errorMsg(char* msg) { fprintf(stderr, msg); exit(EXIT_FAILURE); } So I can do something like this: if (condition) errorMsg("Error, Wrong parameters."); Message will be shown to user and program will exit with error code. But I've recieved minus points for using exit function. So I was just wondering how
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