Why are the destructors not called?
Even though I've written destructors for class A and B, it's not being called.
#include<iostream.h> #include<conio.h> class A { public : A() { cout<<"\nIn A const."; } ~A() { cout<<"\nIn A dest."; } }; class B : public A { public : B() { cout<<"\nIn B const."; } ~B() { cout<<"\nIn B dest."; } }; int main() { A a; B b; getch(); return 0; } Why isn't constructor getting called?
Destructors of objects allocated on the stack is executed as soon as you exit the block containing the objects.
Your code would show the destructor being called before getch() if modified slightly
int main() { { A a; B b; } getch(); return 0; } Here I've used an extra pair of braces to define an inner block. Objects defined inside this block will be destroyed when the block is exited (thus before waiting for the keyboard input).
In your code the destructor is called when the main body block is exited, and this means AFTER waiting for keyboard.
getch().There is no problem with g++ 4.6
mahmood@la:~$ g++ -o test test.cpp mahmood@la:~$ ./test In A const. In A const. In B const. In B dest. In A dest. In A dest.mahmood@la:~$ 
class A { public : A() { cout<<"\nIn A const."; } virtual ~A() { cout<<"\nIn A dest."; } }; The desconstructor should be virtual.
cout << "My Text" << endl;). This works better in terminals that don't automatically insert a new line after program execution. Back to the question: what compiler are you using and I assume you have included<iostream>?<iostream.h>and<conio.h>? Can you make a minimal example in standard C++?