#include <stdio.h>
// Modify this code to for your main program

void exit(int);

   typedef struct webpage {
       int              wpnumber;   // Web page id
       struct webpage*  nextwp;     // Pointer to web page
       struct itarray        {
             int             indexterm;  // Indexterm
             struct webpage* wplink;     // Pointer to web page
         } itl[2];
     } Webpage;

   typedef struct indexterm {
       int                itnumber;       //Index term id
       int                numberoftimes;  //# of web pages that include itnumber
       Webpage*           link2webpage;   //Pointer to web page
       struct indexterm* nextit;          //Pointer to index term
     } Indexterms;



int main(void) 
{ int m,i1,i2;
  char t;
  ...
  while(1==1)
   {t=getchar();
    switch(t) {
     case('i'): {scanf("%d %d %d",&m,&i1,&i2);
                 printf("i %d %d %d\n", m, i1, i2);
                 /* Should invoke a function to insert a web page*/
                 break;}
     case('d'): {scanf("%d",&m);
                 printf("d %d\n",m);
                 /* Should invoke a function to delete a web page */
                 break;}
             ...
     case('l'): {printf("l\n");
                 /* Should invoke a function to print the correct number */
                 break;}
             ...
     case('q'): {printf("q\n"); // need to delete lists
                 exit(0);}
    }
  if('\n' != getchar()) exit(1);
   }
}