5-8

#include <iostream>using namespace std;class A{public:A(){cout<<"constructing A "<<endl;}~A(){cout<<"destructing A "<<endl;}};class B:public A{public:B(){cout<<"constructing B "<<endl;}~B(){cout<<"destructing B "<<endl;}};class C:public B{public:C(){cout<<"constructing C "<<endl;}~C(){cout<<"destructing C "<<endl;}};int main(){ C c1; return 0;}