Why Not Destructor is Calling

[bond5611]

#include<iostream>
using namespace std;

class A{
      int i;
      int b;
      public:
             A(){
                   i=0;
                   b=0;
                   cout<<"constructor"<<endl;
                 }
             int printf(){
                      cout<<i<<" "<<b<<endl;
                      return 1;
                      } 
                      
             ~A(){
                  cout<<"A out of scope"<<endl;
                  }            
      };
class B:public A {
      int i;
      int b;
      public:
             B(){
                 i=0;
                 b=9;
                 cout<<"constructor of B"<<endl;
                 }
             int printf(){
                      cout<<i<<" "<<b<<endl;
                      return 1;
                      } 
             ~B(){
                  cout<<"B out of scope"<<endl;
                  }    
      };      

int main(){
    A obj;
    obj.printf();
    B obj1;
    obj1.printf();
    
    
    
    
    cout<<endl;
    
    
    system("pause");
    return 0;
    }

[Stewbond]

I've reduced your code to this:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

#include<iostream> using namespace std; class A{ public: A() { cout<<"constructor of A"<<endl; } ~A(){ cout<<"destructor of A"<<endl; } }; class B:public A { public: B() { cout<<"constructor of B"<<endl; } ~B(){ cout<<"destructor of B"<<endl; } }; int main() { A objA; B objB; }

constructor of A constructor of A constructor of B destructor of B destructor of A destructor of A

These destructors are being called. You have system("pause"); in there. The destructors are only called AFTER system("pause");

Try running your console app in the console instead of double-clicking on the ICON like so:

Microsoft Windows [Version 6.2.8250]
(c) 2012 Microsoft Corporation. All rights reserved.

C:\Users\Stew>cd "C:\Dev\Snippets\Release"
C:\Dev\Snippets\Release>Snippets.exe
constructor of A
constructor of A
constructor of B
destructor of B
destructor of A
destructor of A

C:\Dev\Snippets\Release>

[cire]

Or change main to limit the scope of the objects:

int main(){
    {
        A obj;
        obj.printf();
        B obj1;
        obj1.printf();
   
        cout<<endl;
    } 
    
    system("pause");
    return 0;
}