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english/basic_content/virtual/set3/full_virde.cpp
39 строк
765 B
xliu79
english
19 июл 2020, 05:38
19 июл 2020, 05:38
2bdeea8
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/** * @file full_virde.cpp * @brief 将基类的析构函数声明为虚函数 * 输出结果： * Constructing base * Constructing derived * Destructing derived * Destructing base * @author 光城 * @version v1 * @date 2019-07-24 */ #include<iostream> using namespace std; class base { public: base() { cout<<"Constructing base \n"; } virtual ~base() { cout<<"Destructing base \n"; } }; class derived: public base { public: derived() { cout<<"Constructing derived \n"; } ~derived() { cout<<"Destructing derived \n"; } }; int main(void) { derived *d = new derived(); base *b = d; delete b; return 0; }