C ++中的纯虚拟析构函数
纯虚拟析构函数在C++中是可能的。如果一个类包含纯虚拟析构函数，则必须为纯虚拟析构函数提供一个函数体。
范例程式码
#include <iostream>
using namespace std;
class B {
public:
virtual ~B()=0; // Pure virtual destructor
};
B::~B() {
std::cout << "Pure virtual destructor is called";
}
class D : public B {
public:
~D() {
cout << "~D() is executed"<<endl;
}
};
int main() {
B *bptr=new D();
delete bptr;
return 0;
}输出结果
~D() is executed Pure virtual destructor is called