python异常与C ++异常处理

问题描述

使用以下代码，我得到Gotcha！使用python。

With the following code, I get the "Gotcha!" with python.

try:
    x = 0
    y = 3/x
except Exception:
    # ZeroDivisionError
    print "Gotcha!"

我认为这是等效的C ++代码，但它无法捕捉到exeption。

I think this is the equivalent C++ code, but it can't catch the exeption.

#include <iostream>

int main()
{
  int x = 0;
  //float y = 3.0/x;
  int z = 0;

  try {
      z = 3 / x;
  } catch (std::exception) {
      std::cout << "Gotcha!";
  }

  std::cout << z;
}

Floating point exception

What went wrong?
How can I catch this exception?

推荐答案

在C ++中，除以零不会产生异常;它会导致未定义的行为。

In C++, dividing by zero doesn't generate an exception; it causes undefined behaviour.

您必须在实际执行部门之前检查您的除数，因为无法知道如果您实际上用零除数评估一个除法表达式。

You must check you divisor before actually performing the division, as there is no way to know what will happen if you do actually evaluate a division expression with a zero divisor.

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