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Call bases constructor and destructor from derived class

#include <iostream>  using namespace std;    class BaseClass {  public:    BaseClass() { cout << "Constructing base portion\n"; }    ~BaseClass() { cout << "Destructing base portion\n"; }  };    class DerivedClass: public BaseClass {  public:    DerivedClass() { cout << "Constructing derived portion\n"; }    ~DerivedClass() { cout << "Destructing derived portion\n"; }  };    int main()  {    DerivedClass ob;      // do nothing but construct and destruct ob      return 0;  } Constructing base portion Constructing derived portion Destructing derived portion Destructing base portion