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Three level inheritance

#include <iostream> using namespace std; class base { public:   base() {       cout << "Constructing base\n";    }   ~base() {       cout << "Destructing base\n";    } }; class derived1 : public base { public:   derived1() {       cout << "Constructing derived1\n";    }   ~derived1() {       cout << "Destructing derived1\n";    } }; class derived2: public derived1 { public:   derived2() {       cout << "Constructing derived2\n";    }   ~derived2() {       cout << "Destructing derived2\n";    } }; int main() {   derived2 ob;   return 0; } Constructing base Constructing derived1 Constructing derived2 Destructing derived2 Destructing derived1 Destructing base