Division by zero works fine in virtual Destructor

Question

#include <iostream>
using namespace std;
static int i=1;
class Parent
{
public:
    virtual ~Parent(){10/i;}
};

class Child: public Parent
{
public:
    virtual ~Child(){--i;}
};

int main()
{
    Parent *ptr = new Parent;
    Parent *ptr1 = new Child;
    delete ptr;
    delete ptr1;
    //cout<<10/i;
    return 0;
}

Why virtual destructor of the Parent class not providing any runtime error? Whereas the commented part of the code throws error when uncommented.

Answer 1

I guess your compiler optimizes the code and removes the useless part, including 10/i in the base class destructor.

Try with this:

#include <iostream>
using namespace std;
static int i=1;
class Parent
{
public:
    virtual ~Parent(){int tmp = 10/i; cout << tmp; }
};

class Child: public Parent
{
public:
    virtual ~Child(){--i;}
};

int main()
{
    Parent *ptr = new Parent;
    Parent *ptr1 = new Child;
    delete ptr;
    delete ptr1;
    //cout<<10/i;
    return 0;
}