摘要:
#include <iostream>using namespace std;class A{public: void SayHello() { cout << "Hello!" << endl; }protected:private:};int main(){ A* obj = new A(); obj->SayHello(); delete obj; obj = NULL; obj->SayHello(); return 0;} 1、应该保证在delete obj;之后,不再使用obj原来指向的对象。2、类中定义的成员函数 阅读全文