如何捕捉在C语言中的整数除零例外？ [英] How to catch the integer division-by-zero exception in C language?

问题描述

据了解，如何捕捉到浮动师被零除异常带的使用

It is known how to catch the float division-by-zero exception with the usage of

signal(SIGFPE, handler)

，但它不即使赶上整数除法被零问题

but it doesn't catch integer division-by-zero problem even if I setup control word with

_control87(0, _MCW_EM ); (MS VC 2010)

SubQuestion_1：如何捕捉整数除零的C程序在Windows中没有SEH EXCEPTION_INT_DIVIDE_BY_ZERO的使用情况如何？ （在Unix / Linux下可以使用标准的信号/ SIGFPE techinque的使用来实现）

SubQuestion_1: How to catch integer division-by-zero in C program in Windows without usage of SEH EXCEPTION_INT_DIVIDE_BY_ZERO? (In Unix/Linux this can be done with usage of the standard signal/SIGFPE techinque)

编辑：
信号是ANSI C的信号处理方法。

_control87是标准的Windows功能设置浮动控制字。

signal is ANSI C signal handling approach.
_control87 is the standard Windows function to set float control word.

类似的问题：<一href=\"http://stackoverflow.com/questions/2155442/how-to-handle-all-errors-including-internal-c-library-errors-uniformly\">http://stackoverflow.com/questions/2155442/how-to-handle-all-errors-including-internal-c-library-errors-uniformly

请注意（从ISO / IEC 9899：TC2附件H.2.2）：

NOTE (from ISO/IEC 9899:TC2 Annex H.2.2):

的署名Ç整数类型int，long int和long long int和相应的
无符号的类型兼容LIA-1。 。C的无符号整数类型在LIA-1感''模'在溢出或超出范围的结果默默地换行。该定义符号整数类型，也被模不需要检测整数溢出的实现，在这种情况下，的仅整数除以零需要被检测到。的

"The signed C integer types int, long int, long long int, and the corresponding unsigned types are compatible with LIA−1. ... C’s unsigned integer types are ‘‘modulo’’ in the LIA−1 sense in that overflows or out-of-bounds results silently wrap. An implementation that defines signed integer types as also being modulo need not detect integer overflow, in which case, only integer divide-by-zero need be detected."

最终的解决方案：

对于Windows：它会抛出异常SEH。因此，它可以通过__try __except的使用被捕获。
 作为可能的解决方案SEH翻译可以用来处理SEH异常，并翻译它们调用所需的功能。这不是一个自然的方式，但它似乎是唯一的办法。

For Windows: it throws SEH exception. So it can be caught by usage of __try __except. As possible solution SEH translation could be used to handle SEH exception and translate them to call of needed function. It is not a "natural" way, but it seems that it's the only way.

对于Unix：它可以与信号/ SIGFPE解决方案被抓住。或检查维基FPE_INTDIV溶液（ HTTP：//rosetta$c$c.org/wiki/ Detect_division_by_zero·C ）。

For Unix: it could be caught with signal/SIGFPE solution. Or check wiki for FPE_INTDIV solution ( http://rosettacode.org/wiki/Detect_division_by_zero#C ).

由于GMAN是对的未定义的行为我选择他的答案是正确的。

As GMan was right about "undefined behaviour" I'm choosing his answer as correct.

注：有趣的是，查询VC \\ CRT \\ SRC \\ winxfltr.c：_XcptActTab数组：）

Note: It is interesting to check VC\crt\src\winxfltr.c: _XcptActTab array : )

推荐答案

被零除导致不确定的行为，没有C语言结构，可以做任何事情。最好的办法是零摆在首位，以不分，通过检查分母。

Division by zero leads to undefined behavior, there is no C language construct that can do anything about it. Your best bet is to not divide by zero in the first place, by checking the denominator.

如果你想钓（注意，C有没有例外）这个错误，这将取决于你的编译器和操作系统，你还没有上市。顺便说一句， _control87 只有做浮点运算，并没有做整数运算。

If you want to "catch" (note, C has no exceptions) this error, it will be dependent on your compiler and OS, which you haven't listed. By the way, _control87 has only to do with floating-point operations, and nothing to do with integer operations.

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