what are constructors and destructors c 2b 2b

1class A
2{
3    // constructor
4    A()
5    {
6        cout << "Constructor called";
7    }
8
9    // destructor
10    ~A()
11    {
12        cout << "Destructor called";
13    }
14};
15
16int main()
17{
18    A obj1;   // Constructor Called
19    int x = 1
20    if(x)
21    {
22        A obj2;  // Constructor Called
23    }   // Destructor Called for obj2
24} //  Destructor called for obj1
25