【C++ Primer | 19】运行类型识别

 1 #include <iostream>  
 2 #include <typeinfo.h>  
 3 
 4 class Base {
 5 public:
 6     virtual void vvfunc() {}
 7 };
 8 
 9 class Derived : public Base {};
10 
11 using namespace std;
12 int main() {
13     Derived* pd = new Derived;
14     Base* pb = pd;
15     cout << typeid(pb).name() << endl;   //prints "class Base *"  
16     cout << typeid(*pb).name() << endl;   //prints "class Derived"  
17     cout << typeid(pd).name() << endl;   //prints "class Derived *"  
18     cout << typeid(*pd).name() << endl;   //prints "class Derived"  
19     delete pd;
20 }