尝试用C catch语句 [英] Try catch statements in C

问题描述

我今天想着try / catch块在其他语​​言中存在。用Google搜索了一会儿这一点，但没有结果。据我所知，没有这样的事情在C.然而try / catch语句，是有办法模拟呢？结果
当然，也有断言和其他技巧，但没有像try / catch语句，也赶上引发的异常。谢谢

I was thinking today about the try/catch blocks existent in another languages. Googled for a while this but with no result. From what I know, there is not such a thing as try/catch in C. However, is there a way to "simulate" them?
Sure, there is assert and other tricks but nothing like try/catch, that also catch the raised exception. Thank you

推荐答案

C本身并不支持例外，但你可以模仿他们在一定程度上与的setjmp 和的longjmp 来电。

C itself doesn't support exceptions but you can simulate them to a degree with setjmp and longjmp calls.

static jmp_buf s_jumpBuffer;

void Example() { 
  if (setjmp(s_jumpBuffer)) {
    // The longjmp was executed and returned control here
    printf("Exception happened\n");
  } else {
    // Normal code execution starts here
    Test();
  }
}

void Test() {
  // Rough equivalent of `throw`
  longjump(s_jumpBuffer, 42);
}

本网站有关于如何模拟与的setjmp 例外一个很好的教程和的longjmp

This website has a nice tutorial on how to simulate exceptions with setjmp and longjmp

• http://www.di.unipi.it/~nids/docs/longjump_try_trow_catch.html

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