threelvl.cpp

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

class Base
{
 public:
   void show_base(void) { cout << "Base class message/n"; };
};

class Level1 : public Base
{
 public:
   void show_level1(void)
   {
       show_base();
       cout << "Level 1 message/n";
   };
};

class Level2 : public Level1
{
  public:
    void show_level2(void)
 {
        show_level1();
        cout << "Level 2 message/n";
 };
};

class Level3 : public Level2
{
  public:
    void show_level3(void)
 {
        show_level2();
        cout << "Level 3 message/n";
 };
};

void main(void)
 {
   Level3 my_data;

   my_data.show_level3();
 }

 

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