Question

Possible Duplicate:
Can a local variable’s memory be accessed outside its scope?

Code:

#include <iostream>
using namespace std;

class B{
    public:
    int b;
    B():b(1){}
    ~B(){cout << "Destructor ~B() " << endl;}
};

class A{
    public:
    B ob;
    A()try{throw 4;}
    catch(...){cout << "Catched in A() handler : ob.b= " << ob.b<<endl;}
};




int main()try{
A t;


}
catch(...){cout << "CATCHED in Main" <<  endl;}

Output:

Destructor ~B() 
Catched in A() handler : ob.b= 1
CATCHED in Main

My Question is how it’s possible to access a member variable b of an object ob that its destructor call finished.

Answer 1

Because while the object has been destroyed, the actual memory that it occupied still exists. However, it’s undefined behavior, and may or may not work.