typeid_2.cpp

  name="google_ads_frame" marginwidth="0" marginheight="0" src="http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-5572165936844014&dt=1194442938015&lmt=1194190197&format=336x280_as&output=html&correlator=1194442937843&url=file%3A%2F%2F%2FC%3A%2FDocuments%2520and%2520Settings%2Flhh1%2F%E6%A1%8C%E9%9D%A2%2FCLanguage.htm&color_bg=FFFFFF&color_text=000000&color_link=000000&color_url=FFFFFF&color_border=FFFFFF&ad_type=text&ga_vid=583001034.1194442938&ga_sid=1194442938&ga_hid=1942779085&flash=9&u_h=768&u_w=1024&u_ah=740&u_aw=1024&u_cd=32&u_tz=480&u_java=true" frameborder="0" width="336" scrolling="no" height="280" allowtransparency="allowtransparency"> #include <iostream.h>
#include <typeinfo.h>

class Base {
   int a, b;
   virtual void func(void) {};
 };

class Derived1: public Base {
   int i, j;
 }

class Derived2: public Base {
   int k;
 }

void main(void)
 {
   int i;
   Base *p, baseobj;
   Derived1 obj1;
   Derived2 obj2;

   cout << "Typeid of i is: ";
   cout << typeid(i).name() << endl;
   p = &baseobj;
   cout << "p is currently pointing to an object of type: ";
   cout << typeid(*p).name() << endl;
   p = & obj1;
   cout << "p is now pointing to an object of type: ";
   cout << typeid(*p).name() << endl;
   p = & obj2;
   cout << "p is finally pointing to an object of type: ";
   cout << typeid(*p).name() << endl;
 }