Answer Posted / shyamal bose

Memory leaks happens for the memory allocated on Heap(ex A
*temp = new A()) . memory allocated by us on stack (int a)
is released automatically when the function returns or
module goes out of scope.

But memory allocated on heap will not be freed
automatically, we need to release it manually.

ex:

func()
{
A *a = new A(); //on heap
int b; // on stack
}

main()
{
func();
}

Now in above example when func is called memory for "a" is
created on HEAP by using NEW, but it is not freed by using
DELETE, hence is memory leak. On the other hand "b" is
created on STACK & freed automatically. so correct
implementation is:
func()
{
A *a = new A(); //on heap
int b; // on stack
delete a; //deleting memory on heap
}

main()
{
func();
}

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