Cascade constructor and destructor call

  
#include <iostream>
using namespace std;
class base 
{
 public:
   base(void) {cout << "Constructing base.\n";}
   ~base(void) {cout << "Destructing base.\n";}
 };

class derived1 : public base 
{
 public:
   derived1(void) {cout << "Constructing derived1.\n";}
   ~derived1(void) {cout << "Destructing derived1.\n";}
 };

class derived2 : public derived1 
{
 public:
   derived2(void) {cout << "Constructing derived2.\n";}
   ~derived2(void) {cout << "Destructing derived2.\n";}
 };

int main(void)
{
   derived2 object;
}

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Cascade constructor and destructor call : Inheritance « Class « C++

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