infocom/compilers/inform5/examples/bazaar.inf

!--------------------------------------------------------------------------
! BAZAAR: an interactive shopping trip
! by Sam Hulick <shulick@raisin.ucs.indiana.edu>
! and Gareth Rees <gdr11@cl.cam.ac.uk>
! 
! The player's money is represented by the PlayersCash object; it should
! never leave the player's possession during the course of the game.
! Monetary objects like coins and bills/notes should be of the class
! MoneyClass.  When picked up, they vanish from the player's inventory and
! their value (stored in their number property) is transferred to the
! PlayersCash object.
!--------------------------------------------------------------------------

Constant Story "BAZAAR";
Constant Headline "^an interactive shopping trip^by Sam Hulick and Gareth
    Rees^";

Include "parser";
Include "verblib";
Include "grammar";

!--------------------------------------------------------------------------
! These global definitions define the unit of currency and the format that
! money comes in.
!--------------------------------------------------------------------------

Constant Currency "pound";
Constant CurrencyPlural "pounds";
Constant CurrencyFormat "note";
Constant CurrencyFormatPlural "notes";
Array CurrencyNames table [; 'note' 'pound' 'pounds' ];
Array CurrencyNamesPlural table [; 'notes' ];

!--------------------------------------------------------------------------
! In the USA you would use the following instead:
! 
!   Constant Currency "dollars";
!   Constant CurrencyPlural "dollars";
!   Array CurrencyNames table [; 'bill' 'dollar' 'dollars' ];
!   Array CurrencyNamesPlural table [; 'bills' ];
!   Constant CurrencyFormat "bill";
!   Constant CurrencyFormatPlural "bills";
!
! and in more traditional adventure circumstances, perhaps:
!
!   Constant Currency "gold";
!   Constant CurrencyPlural "gold";
!   Array CurrencyNames table [; 'gold' 'piece' 'coin' ];
!   Array CurrencyNamesPlural table [; 'pieces' 'coins' ];
!   Constant CurrencyFormat "piece";
!   Constant CurrencyFormatPlural "pieces";
!--------------------------------------------------------------------------

Object  PlayersCash "money" selfobj
 with   name "embarrassing" "lack" "of" "money" "cash",
        short_name [;
            if (self.number == 0) print "embarrassing lack of money";
            else print "money";
            rtrue;
        ],
        number 0,
        article "your",
        before [;
            if (self.number == 0 && action ~= ##Examine)
                "But you have no money!";
         Eat: "Talk about rich food!";
         Drop,ThrowAt,Transfer,Insert,PutOn:
            "You are much too reluctant to part with your hard-earned \
            cash.";
        ],
        description [;
            if (self.number == 0) "You, my friend, are broke.";
            print "You have ", (EnglishNumber) self.number, " ";
            if (self.number == 1) print (string) Currency;
            else print (string) CurrencyPlural;
            ".";
        ];

!--------------------------------------------------------------------------
! Objects representing money are members of MoneyClass.  The class tries to
! get everything right: plurals ("take all the twenty pound notes"),
! articles ("an eight pound note" vs "a ten pound note") and so on.
!--------------------------------------------------------------------------

Class   MoneyClass
 with   parse_name [ n ok w i;
            if (parser_action == ##TheSame) {
                if (parser_one.number == parser_two.number)
                    return -1;
                return -2;
            }
            do {
                ok = 0;
                if (TryNumber(wn) == self.number) {
                    ok = 1; n ++; wn++;
                } else {
                    w = NextWord();
                    for (i = 1: i <= CurrencyNames-->0: i++) {
                        if (w == CurrencyNames-->i) {
                            ok = 1;
                            n ++;
                        }
                    }
                    for (i = 1: i <= CurrencyNamesPlural-->0: i++) {
                        if (w == CurrencyNamesPlural-->i) {
                            ok = 1;
                            n ++;
                            parser_action = PluralFound;
                        }
                    }
                }
            } until (ok == 0);
            return n;
        ],
        article [ a b;
            if (self.number <    10) { a =    1; b = 1; jump PrintArticle; }
            if (self.number <   100) { a =   10; b = 1; jump PrintArticle; }
            if (self.number <  1000) { a =  100; b = 1; jump PrintArticle; }
            if (self.number < 10000) { a = 1000; b = 1; jump PrintArticle; }
            a = 10000; b = 1000;
            .PrintArticle;
            if (self.number / a == 8 || self.number / b == 11 or 18)
                print "an";
            else print "a";
        ],              
        short_name [;
            if (self.number > 1)
                print self.number, " ";
            print (string) Currency;
            if (CurrencyFormat ~= NULL)
                print " ", (string) CurrencyFormat;
            rtrue;
        ],
        plural [;
            if (self.number > 1)
                print self.number, " ";
            print (string) Currency;
            if (CurrencyFormat ~= NULL)
                print " ", (string) CurrencyFormatPlural;
            rtrue;
        ],
        after [;
         Take,Remove:
            PlayersCash.number = PlayersCash.number + self.number;
            remove self;
            "You feel a bit richer now.";
        ];

!--------------------------------------------------------------------------
! Objects that must be purchased are members of BuyClass.  The number
! property is the price of the item.
!--------------------------------------------------------------------------

Class   BuyClass
 with   before [;
         Take,Remove:
            if (self.number ~= 0)
                print_ret "You haven't paid for ", (the) self, ".";
         Buy:
            if (PlayersCash.number < self.number)
                "You haven't enough money to pay for it.";
            PlayersCash.number = PlayersCash.number - self.number;
            print "You hand over ", (EnglishNumber) self.number, " ";
            if (self.number == 1) print (string) Currency;
            else print (string) CurrencyPlural;
            self.number = 0;
            print_ret " and ", (the) self, " is yours.";
        ];

!--------------------------------------------------------------------------
! The game starts here.  The bazaar and its stallholder are stolen from
! Graham Nelson's game "Balances".
!--------------------------------------------------------------------------

[ Initialise;
    location = Bazaar;
    "^^^^^Time for a quick trip to the market...^^";
];

Object  Bazaar "Bazaar"
 has    light
 with   name "bazaar" "jabbering" "natives" "native",
        description "This is a crowded, noisy bazaar. Directly in front \
            of you is a stall. But the contemptuous-looking stallholder \
            is doing a very poor trade: hardly anyone wants to buy his \
            merchandise.",
        each_turn [;
            switch(random(4)) {
             1: "^~Roll up! Roll up! Get your adventuring merchanise \
                 here!~";
             2: "^~Come on, then! Just three pounds gets you a brass \
                 lamp!~";
             3: "^~Elvish swords! You want them, we have them! A snip at \
                 twenty-three pounds!~";
             4: "^~Bargains! Bargains! Come and get 'em!~";
            }
        ],
        cant_go "Everywhere, the crowds of jabbering natives block your \
            way to all the good stalls. In fact, the only stall you can \
            get at is this dismal one.";

Nearby  StallHolder "stallholder"
 has    animate scenery
 with   name "barker" "burly" "man",
        number 0,
        description "A boxer gone to seed who failed as a magician down \
            the coast, that'd be your guess.",
        life [;
         Attack, Kiss: "No way. He must weigh twice what you do.";
         Order, Answer: "The stallholder glowers at you.";
        ];

!--------------------------------------------------------------------------
! With the monster definition of MoneyClass out of the way, actual examples
! of monetary items are easy to define.
!--------------------------------------------------------------------------

Nearby Twenty "x" class MoneyClass with number 20;
Nearby Ten "x" class MoneyClass with number 10;
Nearby Five "x" class MoneyClass with number 5;
Nearby One "x" class MoneyClass with number 1;

!--------------------------------------------------------------------------
! Finally, some objects to purchase.
!--------------------------------------------------------------------------

Nearby  Lamp "brass lamp"
 class  BuyClass
 has    light
 with   name "brass" "lamp" "lantern",
        number 3;

Nearby  Sword "elvish sword"
 class  BuyClass
 with   name "sword" "elvish",
        number 23;

End;