P201 8

<img src="http://img.blog.csdn.net/20150518130716916?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvWXVTb25nNDg2OQ==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />#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; }