# File : quest.bush

    #!/usr/local/bin/bush

    -- Quest
    --
    -- An old BASIC exploration game.
    -- Coverted to BUSH, Ken O. Burtch, 2003
    -- WARNING: Conversion not finished!!
    --
    -- THIS PROGRAM WAS TAKEN FROM THE JULY 1979 BYTE MAG.
    -- BY LEE DUSBABEK FOR THE FAMOUS SKIP HANSON (WB6YMH)

    pragma ada_95;
    pragma restriction( no_external_commands );

    procedure quest is

    number_of_rooms : constant integer := 42; -- was M9
    first_treasure_room : constant integer := 23; -- was T1
    second_treasure_room : constant integer := 12; -- was T2

    room : array( 1..42 ) of integer; -- was W
    move : array( 1..42 ) of string; -- movement table, M
    -- since BUSH only has 1-D arrays, the 43 elements will be fields.
    move_sep : character := ',';

    score : integer; -- was S

    current_room  : natural := 5; -- was N
    save_current  : natural; -- was N9
    next_room     : natural; -- was I
    N0            : natural; -- was N0
    moves : integer := 0; -- was M0
    moves_to_find_treasure : integer := 0; -- was M6
    treasure_room : integer := first_treasure_room; -- was T
    pirate_room   : integer := 0; -- was P
    P1 : integer := 0;
    N8 : integer;
    debug : boolean := true; -- was D
    J : natural;

    -- for input

    a  : string;
    a1 : positive;
    a2 : natural;
    a0 : positive;

    procedure get_input is
    -- 5000 REM
    -- Return in a1 the user's choice from string a
    -- a = string containing list of characters
    -- a2 = length of a
       q2 : string;
       q : character; -- Q$
    begin
       loop
         --q2 := get_line;
         --if strings.length( q2 ) > 0 then
         --   q := strings.element( q2, 1 );
         --else
         --   q := ' ';
         --end if;
         q := strings.to_upper( inkey );
         put( q );
         put( "-" );
         put( a );
         a2 := strings.index( a, q & "" );
         exit when a2 > 0;
      end loop;
      a1 := positive( a2 ); -- WAS a1 := positive( a2 )+1;
    end get_input;

    procedure tally_score is
    -- 3000 REM
    begin
      score := 0;
      if treasure_room = -1 then
         score := score + 5;
      end if;
      if pirate_room = 1 then
         score := score + 10;
      end if;
      for j in 2..number_of_rooms loop
        score := score + room(j);
      end loop;
    end tally_score;

    procedure show_room is
    -- 8000 REM
    begin

    --8050 I=INT(N/5)
    --8060 J=N-5*I+1

    --8100 ON I+1 GOTO 8200,8210,8220,8230,8240,8250,8260,8270,8280,8290
    --8200 ON J GOTO 9000,9010,9020,9030,9040
    --8210 ON J GOTO 9050,9060,9070,9080,9090
    --8220 ON J GOTO 9100,9110,9120,9130,9140
    --8230 ON J GOTO 9150,9160,9170,9180,9190
    --8240 ON J GOTO 9200,9210,9220,9230,9240
    --8250 ON J GOTO 9250,9260,9270,9280,9290
    --8260 ON J GOTO 9300,9310,9320,9330,9340
    --8270 ON J GOTO 9350,9360,9370,9380,9390
    --8280 ON J GOTO 9400,9410,9420,9430,9440
    --8290 ON J GOTO 9450,9460,9470,9480,9490

    case current_room is
    when 1 => put_line( "YOU'RE AT A DEAD END!" );
    when 2 => put_line( "YOU CAN'T GO IN THAT DIRECTION" );
              new_line;
    when 3 => put_line( "A TUNNEL GOES NORTH-SOUTH." );
              put_line( "THERE IS AN OPENING TO THE WEST." );
    when 4 => put_line( "YOU'RE ON THE BRINK OF A PIT." );
    when 5 => put_line( "YOU'RE OUTSIDE THE CAVE." );
              put_line( "GO SOUTH TO ENTER." );
    when 6 => put_line( "YOU'RE AT THE HOME OF THE GNOME-KING." );
              put_line( "FORTUNATELY, HE'S GONE FOR THE DAY." );
    when 7 => put_line( "THE GNOME KING IS HERE!" );
              put_line( "YOU'D BETTER GET OUT!" );
              new_line;
    when 8 => put_line( "YOU'RE LOST IN THE WOODS." );
    --when 9 => null;
    when 10 => put_line( "YOU'RE NOT GOING TO GET FAR, DIGGING" );
               put_line( "THROUGH ROCK." );
               new_line;
    when 11 => put_line( "YOU'RE AT THE BOTTOM OF A PIT. A LITTLE" );
               put_line( "STREAM FLOWS OVER THE ROCKS HERE." );
    when 12 => put_line( "YOU'RE AT A DEAD END!" );
    when 13 => put_line( "YOU'RE AT A WIDE SPOT.  THERE IS A SOOTY PATCH" );
               put_line( "WHERE SOMEBODY HAS RESTED A TORCH AGAINST THE WALL." );
               put_line( "THERE ARE JAGGED ROCKS ABOVE YOU." );
    when 14 => put_line( "YOU'RE IN A CANYON.  HIGH ON THE WALL ABOVE YOU" );
               put_line( "IS SCRATCHED THE MESSAGE    'BILBO WAS HERE'" );
    when 15 => put_line( "YOU'RE NOT A BIRD.  YOU CAN'T FLY!" );
               new_line;
    when 16 => put_line( "YOU'RE IN A LOW CHAMBER.  A TIGHT TUNNEL GOES" );
               put_line( "EAST, AND YOU CAN WALK TO THE SOUTH OR WEST." );
               put_line( "THERE IS LIGHT TO THE NORTH." );
    when 17 => put_line( "IT'S A TIGHT SQUEEZE.  YOU CAN'T GET PAST" );
               put_line( "WITH THE TREASURE." );
               new_line;
    when 18 => put_line( "I DON'T THINK YOU CAN FIND THE CAVE." );
               put_line( "YOU'RE AT THE TOP OF A CLIMB." );
               put_line( "BELOW YOU A MESSAGE SAYS" );
               put_line( "     'BILBO WAS HERE'" );
    when 19 => put_line( "YOU'RE AT THE NORTH SIDE OF A CHASM," );
               put_line( "TOO WIDE TO JUMP.  RINGING ECHOES FROM" );
               put_line( "BELOW ARE THE ONLY INDICATION OF DEPTH." );
    when 20 => put_line( "YOU'RE IN XANADU.  BELOW YOU ALPH,  THE SACRED" );
               put_line( "RIVER RUNS THROUGH CAVERNS MEASURELESS TO MAN," );
               put_line( "DOWN TO A SUNLESS SEA." );
    when 22 => put_line( "YOU'RE ON THE LEDGE ABOVE THE GUILLOTINE ROOM." );
    when 23 => put_line( "I HEAR THE GIANT THERE!!!" );
               put_line( "YOU'D BETTER GO BACK!" );
               new_line;
    when 24 => put_line( "YOU'RE IN THE GIANT'S CAVERN.  BETTER" );
               put_line( "NOT BE HERE WHEN THE GIANT COMES!" );
    when 25 => put_line( "YOU'RE IN THE QUEST RESEARCH AND DEVELOPMENT AREA." );
               new_line;
               put_line( "I'M SORRY BUT VISITORS ARE NOT ALLOWED. YOU'LL HAVE" );
               put_line( "TO LEAVE." );
               new_line;
    when 26 => put_line( "YOU'RE IN THE CRYSTAL PALACE.  THE WALLS RESONATE" );
               put_line( "WTH AWESOME MUSIC." );
    when 27 => put_line( "YOU'RE AT THE TOP OF A GIANT STALACTITE." );
               put_line( "YOU COULD SLIDE DOWN, BUT YOU COULDN'T" );
               put_line( "CLIMB BACK UP." );
    when 28 => put_line( "YOU'RE IN A LITTLE GROTTO.  THERE IS A" );
               put_line( "BOOK HERE CALLED JANE'S FIGHTING SHIPS," );
               put_line( "DATED 1763." );
    when 29 => put_line( "YOU'RE IN THE GUILLOTINE ROOM.  A SHARP" );
               put_line( "ROCK BALANCES PRECARIOUSLY ON THE" );
               put_line( "LEDGE ABOVE YOU." );
    when 30 => put_line( "YOU'RE IN A CHUTE, SCRAMBLING DOWN THE" );
               put_line( "ROCKS!  NO WAY TO STOP!!!    HANG ON!" );
               new_line;
    when 31 => put_line( "THE TIGHT TUNNEL TURNS A CORNER." );
    when 32 => put_line( "YOU'RE IN A LITTLE TWISTY MAZE" );
    when 33 => put_line( "YOU'RE IN A LITTLE TWISTING MAZE." );
    when 34 => put_line( "YOU'RE IN A TWISTING LITTLE MAZE." );
    when 35 => put_line( "YOU'RE IN A TWISTY LITTLE MAZE." );
    when 36 => put_line( "YOU'RE IN A PREHISTORIC DWELLING.  ON" );
               put_line( "THE WALL ARE DRAWINGS OF BISON DONE IN" );
               put_line( "RED CLAY.  THE FLOOR IS STREWN WITH" );
               put_line( "BONES, THE REMAINS OF ANCIENT RITUALS." );
               put_line( "A SMALL TUNNEL GOES THROUGH THE FLOOR." );
    when 37 => put_line( "YOU'RE IN A BLACK HOLE.  THE" );
               put_line( "FORCE OF GRAVITY IS OVERWHELMING." );
    when 38 => put_line( "YOU'RE IN THE LABYRINTHE." );
    when 39 => put_line( "YOU'RE IN THE LABYRINTHE." );
               put_line( "IT'S VERY DARK IN HERE." );
    when 40 => put_line( "YOU'RE IN THE ASHRAM.  INCENSE IS HEAVY" );
               put_line( "IN THE AIR, AND ALL DIRECTIONS" );
               put_line( "SEEM THE SAME.");
    when others =>
           if treasure_room = integer(current_room) then
              new_line;
              put_line("  THE TREASURE IS HERE!!!!");
           elsif treasure_room = second_treasure_room or
                first_treasure_room /= second_treasure_room or
                first_treasure_room = integer(current_room) then
              new_line;
              put_line( "A NOTE ON THE WALL SAYS PIRATES NEVER LEAVE" );
              put_line( "THEIR TREASURE TWICE IN THE SAME PLACE!" );
           end if;
    end case;
    end show_room;

    procedure check_for_pirate is
    -- was 4000 REM
    begin
      if integer(current_room) = second_treasure_room then
         return;
      end if;
      if pirate_room = 1 then
         return;
      end if;
      if first_treasure_room = second_treasure_room then
         return;
      end if;
      if treasure_room /= -1 then
         return;
      end if;
      if current_room = 16 then
         pirate_room := 160;
      end if;
      if P1 > 0 then
         P1 := P1+1;
      end if;
      if current_room = 3 then
         P1 := P1+1;
      end if;
      if P1<15 then
         return;
      end if;
      new_line;
      put_line( "SUDDENLY THE PIRATE LEAPS OUT OF THE" );
      put_line( "GLOOM AND GRABS THE TREASURE FROM YOU!" );
      put_line( "'HAH!', HE SHOUTS, 'YOU FOUND MY" );
      put_line( "TREASURE, DID YOU?!   WELL, I'LL HIDE" );
      put_line( "IT BETTER THIS TIME!'" );
      put_line( "AND HE DISAPPEARS INTO THE DARKNESS" );
      put_line( "WITH THE TREASURE." );
      pirate_room := 1;
      treasure_room := second_treasure_room;
    end check_for_pirate;

    procedure check_for_treasure is
    begin
      if treasure_room /= integer(current_room) then
         return;
      end if;
      if treasure_room < 0 then
         return;
      end if;
      if moves_to_find_treasure+5>moves then
         return;
      end if;
      put_line( "  DO YOU WANT TO TAKE IT WITH YOU" );
      loop
        a := "YN";
        a2 := 2;
        get_input;
        exit when a1 in 1..2;
        put_line( "WELL?....." );
      end loop;
      if a1 = 1 then
         treasure_room := -1;
         new_line;
         put_line( "OK, LETS GET OUT OF HERE!" );
      else
         new_line;
         put_line( "WE'LL LEAVE IT HERE AND YOU CAN EXPLORE SOME MORE." );
         moves_to_find_treasure := moves;
      end if;
    end check_for_treasure;

    procedure show_options is
    -- 7500 REM
    begin
      new_line;
      put_line( "TYPE N,S,E,W, U   OR D  FOR NORTH, SOUTH," );
      put_line( "EAST, WEST, UP OR DOWN.  TYPE P FOR SCORE" );
      new_line;
    end show_options;

    procedure get_command is
    -- 7000 REM
    --
       allowed : constant string := "NEUDWSP"; -- A$
    begin
      new_line;
      put( "                      WHICH WAY" );
      loop
        loop
          a2 := 7;
          a := allowed;
          get_input;
          exit when a1 < 8;
          put_line( "WHICH WAY DO YOU WANT TO GO?" );
          show_options;
          show_room;
        end loop;
        exit when a1 < 7;
        tally_score;
        put( "YOU HAVE" ); put( score ); put( " POINTS!" );
        new_line;
      end loop;
    end get_command;

    -- Main Program Begins

    begin

    new_line;
    put_line( "WARNING: The conversion isn't finished.  This game is not" );
    put_line( "working. -- KB" );
    new_line; new_line; new_line;
    put_line( "  YOU WERE WALKING THROUGH THE WOODS ONE DAY AND YOU" );
    put_line( "CAME ACROSS THE ENTRANCE OF A CAVE, COVERED WITH BRUSH." );
    put_line( "  PEOPLE SAY THAT MANY YEARS AGO A PIRATE HID HIS" );
    put_line( "TREASURE IN THESE WOODS,  BUT NO ONE HAS EVER FOUND IT." );
    put_line( "IT MAY STILL BE HERE,  FOR ALL I KNOW." );

    move(1) := "1,0,0,0,0,0,0";
    move(2) := "-2,101,-2,0,0,0";
    move(3) := "33,2,1,10,106,4";
    move(4) := "3,30,2,11,2,1";
    move(5) := "8,8,15,10,8,16";
    move(6) := "16,3,2,10,2,2";
    move(7) := "7,-2,101,-2,0,0,0";
    move(8) := "18,18,15,10,18,9";
    move(9) := "-2,33,5,1,0,-2";
    move(10) := "-2,101,-2,0,0,0";
    move(11) := "1,13,4,2,1,2";
    move(12) := "36,2,1,2,1,2";
    move(13) := "2,37,2,1,11,14";
    move(14) := "13,1,19,2,31,31";
    move(15) := "-2,101,-2,0,0,0";
    move(16) := "5,33,2,10,1,106";
    move(17) := "-2,101,-2,0,0,0";
    move(18) := "-2,101,8,0,0,0";
    move(19) := "224,2,2,14,1,42";
    move(20) := "226,1,2,2,25,2";
    move(21) := "1,226,2,2,38,25";
    move(22) := "-2,33,13,50,29,30";
    move(23) := "2,1,2,31,2,2";
    move(24) := "-2,101,19,0,0,0";
    move(25) := "21,20,2,2,1,19";
    move(26) := "-2,65,-2,50,11,14";
    move(27) := "2,40,2,2,21,20";
    move(28) := "-2,60,221,50,14,19";
    move(29) := "2,42,2,13,1,1";
    move(30) := "34,34,2,1,4,2";
    move(31) := "14,14,23,2,1,2";
    move(32) := "-2,101,516,0,0,0";
    move(33) := "2,1,2,1,116,3";
    move(34) := "1,35,2,1,30,30";
    move(35) := "2,1,2,37,34,36";
    move(36) := "35,2,1,37,34,12";
    move(37) := "2,1,35,2,13,2";
    move(38) := "2,21,2,116,1,2";
    move(39) := "2,40,2,32,21,26";
    move(40) := "40,40,2,2,40,41";
    move(41) := "40,40,40,2,40,39";
    move(42) := "28,28,28,28,28,28";

    new_line;

    put_line( "WHEN YOU ANSWER A QUESTION, I LOOK AT ONLY" );
    put_line( "THE FIRST LETTER, ALTHOUGH YOU CAN TYPE IN" );
    put_line( "THE WHOLE WORD IF YOU WANT TOO." );
    show_options;

    -- MASTER LOOP for restarting game

    loop

    for j in 1..number_of_rooms loop
        room(j) := 0;
    end loop;

    new_line;

    loop                                               -- game loop

      show_room;                                       -- show first room
      moves := moves + 1;                              -- first move

      save_current := current_room;                    -- remember where we parked
      N8 := 0;                                         -- NQS

      get_command;
                                        -- get a command

      if current_room /= 1 then
         N0 := current_room;
         a0 := a1;
      end if;
      new_line;
      next_room := numerics.value( strings.field( move(a1), current_room, "," ) );

    --  loop

        loop
           if next_room = -2 then
              next_room := save_current;
           end if;
           if debug then
              put_line( standard_error, "DEBUG" & strings.image(current_room) &
                " TO" & strings.image(next_room) );
           end if;
           if next_room >= 500 then
              next_room := next_room - 500;
              delay 2.0;
           else
              exit;
           end if;
        end loop;

        if numerics.truncation(next_room/100) = 0 then
           current_room := next_room;
        elsif numerics.truncation(next_room/100) = 1 then
           current_room := next_room-100;
           if treasure_room = -1 then
              current_room := current_room + 1;
           end if;
        else
           current_room := next_room-200;
           if treasure_room = -1 then
              current_room := current_room + natural(pirate_room);
           end if;
        end if;

        if current_room = 1 then
           for j in 1..6 loop
               strings.replace( move(j), current_room, "2", ',' );
           end loop;
        end if;
        strings.replace( move(7-a0), current_room, strings.image(N0), ',' );

    -- 6500 REM

        if N8 /= 2 then
           show_room;
        end if;

        room( current_room ) := 1;
        N8 := 8;

        if numerics.value( strings.field( move( 1 ), current_room, move_sep ) ) = -2 then
           next_room := numerics.value( strings.field( move( 6 ), current_room ) );
           J := -1;

           if numerics.value( strings.field( move(4), current_room, move_sep ) ) > numerics.rnd(100) then
              next_room := numerics.value( strings.field( move(5), current_room ) );
           end if;
           J := -1;
           if numerics.value( strings.field( move(2), current_room, move_sep ) ) > numerics.rnd(100) then
              next_room := numerics.value( strings.field( move(3), current_room, move_sep ) );
           end if;
           if debug then
              put_line( "   DEBUG BOUNCE TO" & strings.image( current_room ) );
           end if;
        end if;

    -- end loop;

      check_for_teasure;
      check_for_pirate;
      exit when treasure_room < 0 or current_room = 5; -- goto 1400

    end loop; -- game loop

    tally_score;
    new_line;
    put_line( " CONGRATULATIONS!!   YOU GOT THE TREASURE" );
    put( "OUT IN" );
    put( moves );
    put( "MOVES AND YOU GOT" );
    put(score+10 );
    put_line( "POINTS!" );
    put_line( "WANT TO HUNT AGAIN?" );
    loop
      a := "YN";
      a2 := 2;
      gosub get_input;
      exit when a1 in 1..2;
    end loop;
    exit when a1 = 2;

    end loop; -- master loop here

    end quest;