Code behavior#

1
A *a = new A[4];

• This dynamically allocates an array of 4 objects of class A.
• The constructor is called once for each object, in order.

1
delete[] a;

• This deletes the array.
• The destructor is called once for each object, in reverse order.

Order of calls#

1. Constructors (called 4 times):

   • Object 1
   • Object 2
   • Object 3
   • Object 4

2. Destructors (called 4 times, reverse order):

   • Object 4
   • Object 3
   • Object 2
   • Object 1

Output#

1
Constructor called
2
Constructor called
3
Constructor called
4
Constructor called
5
Destructor called
6
Destructor called
7
Destructor called
8
Destructor called

Key Concept (Exam Tip)#

• new[] → constructor called for each element
• delete[] → destructor called for each element in reverse order