dblinkl.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>
#include <string.h>
#include <stdlib.h>

class list_object
{
 public:
   char info;
   list_object *next;
   list_object *previous;
   list_object(void) {
      info = 0;
      next = NULL;
      previous = NULL;
    }
   list_object *getnext(void) {return next;}
   list_object *getprevious(void) {return previous;}
   void getinfo(char &c) { c = info;}
   void change(char c) {info = c;}
   friend ostream &operator<<(ostream &stream, list_object o)
    {
      stream << o.info << endl;
      return stream;
    }
   friend ostream &operator<<(ostream &stream, list_object *o)
    {
      stream << o->info << endl;
      return stream;
    }
   friend istream &operator>>(istream &stream, list_object &o)
    {
      cout << "Enter information: " << endl;
      stream >> o.info;
      return stream;
    }
 };

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