/*  Capitals.c  (c) Kari Laitinen

    http://www.naturalprogramming.com/

    2013-11-22 File created.
    2013-11-22 Last modification.
*/

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

int main()
{
   char countries_and_capitals[]  = 

   "Finland Helsinki   Usa Washington   Denmark Copenhagen "
   "Afghanistan Kabul  Russia Moscow    England London "
   "Italy Rome         France Paris     Spain Madrid "
   "Portugal Lisbon    Chile Santiago   Japan Tokyo "
   "Sweden Stockholm   Norway Oslo      Pakistan Islamabad "
   "Iceland Reykjavik  Hungary Budapest Holland Amsterdam "
   "Belgium Brussels   Austria Vienna   Israel Jerusalem "  ; 

   char country_name[ 20 ] ;
   char capital_name[ 20 ] ;
   int character_index ;
   char* name_from_list ;
   char* text_after_country_name ;

   printf( "\n This program may know the capital of a country."
           "\n Type in a country name: " ) ;

   gets( country_name ) ;

   for ( character_index = 0 ;
         character_index < strlen( country_name ) ;
         character_index ++ )
   {
      country_name[ character_index ] = country_name[ character_index ] | 0x20 ;
   }

   country_name[ 0 ] = country_name[ 0 ] & 0xDF ;

   /* Now country name should be in lowercase letters with the
      first letter capitalized. */

   name_from_list = strstr( countries_and_capitals, country_name ) ;

   if ( name_from_list != 0 )
   {
      /* The given country name was found in the list. */

      text_after_country_name = strstr( name_from_list, " " ) ;

      /* We suppose that there is exactly one space character
         after each country name. We'll skip the space,
         and copy the capital name. */

      text_after_country_name ++ ;

      character_index = 0 ;

      while ( *text_after_country_name != ' ' &&
              *text_after_country_name != 0 )
      {
         capital_name[ character_index ] = *text_after_country_name ;
         character_index ++ ;
         text_after_country_name ++ ;
      }

      /* Let's terminate the capital_name string. */

      capital_name[ character_index ] = 0 ;

      printf( "\n The capital of %s is %s \n",
              country_name, capital_name ) ;
   }
}