#include 
     
      #include 
      
       using namespace std;class A{public:    A()    {        puts("this is A!");    }};class B : A{public:    B()    {        puts("this is B!");    }};class C : B{public:    C()    {        puts("this is C!");    }};int main(){    //A a;    C c;    return 0;}
      
     

　　

 

this is A!this is B!this is C!Process returned 0 (0x0)   execution time : 0.007 sPress any key to continue.