








#include<stdio.h>
#include<strings.h>
#include<sys/time.h>
#include<stdlib.h>

#define MINUTE 45

int main()
{
  system("rm index.html");
  system("wget http://www.cs.rmit.edu./students/");
  sleep(MINUTE);
  system("mv index.html first.html");
  system("wget http://www.cs.rmit.edu./students/");
  system("sdiff first.html index.html > report.html");
  FILE* fp = fopen("report.html","r");
  if (fp != NULL)
   {
     printf("Please  the changes in your mail");
     system("mailx -s \"WatchDog \"  < report.html");
    }
  system("rm first.html");
}


         

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

    
    int main ()
    {
      FILE *fp;
      char s[300] , ptr[20]; 	     
	system("rm *.html* ");
      system("wget http://www.cs.rmit.edu./students/ ");    
	system("mv index.html First.html");
	system("sleep 10");
	system("wget http://www.cs.rmit.edu./students/ "); 
      system("diff First.html index.html > difference.txt" );
	fp=fopen("difference.txt","r");
      if(fgets(ptr,30,fp))
	     {
	     system( "mailx -s   \"Changes were detected \"    < difference.txt ");
           }
    else 
	      printf(" were  changes detected"); 
	     
            return 0;   
      

     }
      
      
   



