"C + +" uses virtual destructors correctly

Source: Internet
Author: User
Using virtual destructors correctly//using virtual destructors, when delete Deletes an object, ensures that the destructor executes correctly (dynamic) #include <iostream>using namespace Std;class b{public:b () {cout<< "B" <<ENDL;} virtual void fun () {cout<< "B::fun ()" <<ENDL;} Virtual ~b ()//~b ()     //is not a virtual destructor, which causes subclasses to be unable to refactor {cout<< "~b" <<ENDL;} Private:int x;}; Class D:public B{public:d () {cout<< "D" <<ENDL;} void Fun () {cout<< "d::fun (int)" <<ENDL;} void Show () {cout<< "D::show ()" <<ENDL;} ~d () {cout<< "~d" <<ENDL;} Private:int y;}; void Main () {B *PB = new D;delete PB;} 

"C + +" uses virtual destructors correctly

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