纯虚函数==0

#include <iostream>
class Base
{
public:
virtual ~Base()=0; // 纯虚析构函数
};
Base::~Base()
{
std::cout << "Pure virtual destructor is called\n";
}

class Derived : public Base
{
public:
~Derived()
{
std::cout << "~Derived() is executed\n";
}
};

int main()
{
Base *b = new Derived();
delete b;
return 0;

 
原文链接：https://blog.csdn.net/shltsh/article/details/46000003

来源：https://www.cnblogs.com/hshy/p/11947498.html