[Dev-C++] Constructor and Destructor

[Verma, L. <Loh...@hp...>]

Hi
I have a question regarding constructors and destructors, and about class
pointers
If I have a class A (see below), Now the second call crashes

Also I can call a member function without allocating memory for a class
object.

Please see code below and advice.

Thanks a lot

Lohit

 

#include <iostream>
using namespace std;

class A{

public:
A(){
delete this;
}
~A(){
cout<<"~A";
}

f(){

cout<<"HELLO\n";

}

};

int main()
{
    A *a=new A();//works
    A b;//crashes why?? how is it any different from above.

        A *c;

                c->f();//works why when I have not allocated any memory for
this.

}
  

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