Main Begins
default constructor (Object 0 created)
Before calling k1
Inside k1
Before returning something
The returning variable would be created by copy constructor
customized copy constructor (copying from Object 0 to Object 1)
Destructor (Object 1 destroyed)
The return variable is not stored and destroyed


Entering Scope X 
Before calling k2
'a' would be created by the copy constructor with argument 'h0'
notice: Object 0 is h0 
customized copy constructor (copying from Object 0 to Object 2)
Inside k2
notice: Object 2 is a
Before returning something
The returning variable would be created by copy constructor
'a' (Object 2) would be deleted when this function ends, because it was created as a result of pass-by-value
customized copy constructor (copying from Object 2 to Object 3)
Destructor (Object 2 destroyed)
Creating dynamic variable and store its address in p1 using the copy constructor of abc
customized copy constructor (copying from Object 3 to Object 4)
The return variable is stored in h1
h1 (Object 3) would be deleted after scope X ended
(Object 4) which is pointer to by p1 would not be deleted because it is created as dynamic variable
End of this scope X
Destructor (Object 3 destroyed)

h0 (Object 0) would be deleted after the main scope ended
End of this main scope
Destructor (Object 0 destroyed)