main()
{
 int i=0,j=0,m,p=0,v,b=0;
 long int dec=0;
 char hex[10];
 char ref[]={'1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','\0'};
 clrscr();
 printf("Enter the hexadecimal number : ");
 scanf("%s",hex);
 while(hex[i]!='\0')
 {
  j=0;
  b=i;
  while(ref[j]<='\0')
  {
   if(hex[i]==ref[j])
     m=j;
   else
     i++;
  }
  p=p*16;
  if(p==0)
    p=1;
  v=p*j;
  dec=dec+v;
  i=b;
  i++;
 }
 printf("\nState of m : %d, or %d",m,j);
 printf("\nThe decimal equivalent of the entered hexadecimal number is %d.",dec);
}