package?automat;
import?java.util.HashMap;

/**
?*?自動售貨機程序：
?*?	工作流程：
?*?		顧客投入硬幣購買飲料：啤酒和橙汁，售價都是5毛一個，機內預存兩種飲料各3個，
?*?	機內存硬幣5毛的5個，1元的3個，要求完成一下功能：
?*?		1。	如顧客投入5毛，則可以選擇飲料，如果選擇是啤酒和橙汁，且有存貨，顯示“請取回**飲料”字樣；
?*?			否則如果沒有存貨或者選擇飲料類型超出上面兩種，顯示錯誤信息，退出5毛給用戶；；
?*?		2。	如果用戶投入超過5毛的金額，則要考慮是否要找錢，只要在飲料種類正確、庫存足夠、金額足夠、
?*?			能夠找錢的情況下才給出飲料，否則顯示錯誤信息；
?*?		
?*?@author?decoer
?*
?*/
public?class?SaleMachine?{
	//number?of?50?coin
	private?int?num50?		=?5;
	//number?of?100?coin
	private?int?num100?		=?3;
	
	//type?of?juices
	private?HashMap?types;
	
	//constructor
	public?SaleMachine（）{
		//initialization
		types?=?new?HashMap（2）;
		types.put（“beer“?Integer.valueOf（3））;
		types.put（“orange“?Integer.valueOf（3））;
	}
		
	/**
	?*?buy?an?item?with?given?type?and?money
	?*?@param?type		
	?*?@param?money
	?*?@return?the?message?text
	?*/
	public?String?buy（String?type?int?money）{
		//whether?a?valid?money?number
		if（!（money==50?||?money==100））
			return?SaleMachineMessage.INVALID_MONEY;
		
		//whether?an?allowed?type
		if（!types.containsKey（type））
			return?SaleMachineMessage.NOT_PROVIDED;
		
		//still?available
		Integer?num?=?types.get（type）;
		if（num.intValue（）==0）
			return?SaleMachineMessage.ALREADY_SOLD;
		
		//whether?to?give?change
		boolean?change?=?false;
		if（money>50）{
			if（num50==0）
				return?SaleMachineMessage.NO_CHANGE;
			num50?--;
			num100?++;
			change?=?true;
		}else
			num50?++;
		
		//ok?give?a?juice?out?and?decrease?the?number?by?1
		num?--;
		types.put（type?num）;
		
		return?SaleMachineMessage.PICK_UP?+?（（change）?SaleMachineMessage.PICK_CHANGE:““）;?
	}
	
	/**
	?*?print?current?states
	?*/
	public?void?printInfo（）{
		System.out.println（“--------------------------“）;
		System.out.println（“Juice?:?“）;
		for（String?key?:?types.keySet（））{
			System.out.println（“\t“?+?key?+?“\t=\t“?+?types.get（key））;
		}
		System.out.println（“50?coin?:?\t“?+?num50）;
		System.out.println（“100?coin?:?\t“?+?num100）;
		System.out.println（“Total?money?:?\t“?+?Integer.toString（num50*50?+?num100*100））;
		System.out.println（“--------------------------“）;
	}
	
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2011-01-23?20:53??ST.emma.automat\
?????文件?????????696??2011-01-24?21:01??ST.emma.automat\.classpath
?????文件?????????391??2011-01-23?08:04??ST.emma.automat\.project
?????目錄???????????0??2011-01-23?08:04??ST.emma.automat\.settings\
?????文件?????????629??2011-01-23?08:04??ST.emma.automat\.settings\org.eclipse.jdt.core.prefs
?????文件???????10341??2011-01-23?20:50??ST.emma.automat\beer.jpeg
?????目錄???????????0??2011-01-24?21:01??ST.emma.automat\bin\
?????目錄???????????0??2011-01-24?21:01??ST.emma.automat\bin\automat\
?????文件????????2698??2011-01-24?21:01??ST.emma.automat\bin\automat\SaleMachine.class
?????文件?????????827??2011-01-24?21:01??ST.emma.automat\bin\automat\SaleMachineMessage.class
?????文件????????1847??2011-01-25?06:16??ST.emma.automat\bin\automat\SaleMachineTest.class
?????目錄???????????0??2011-01-24?21:01??ST.emma.automat\bin\gui\
?????文件????????1403??2011-01-24?21:01??ST.emma.automat\bin\gui\SaleMachineGUI$1.class
?????文件????????1405??2011-01-24?21:01??ST.emma.automat\bin\gui\SaleMachineGUI$2.class
?????文件????????3180??2011-01-24?21:01??ST.emma.automat\bin\gui\SaleMachineGUI.class
?????文件??????107210??2011-01-23?20:30??ST.emma.automat\bin\org.eclipse.core.commands_3.6.0.I20100512-1500.jar
?????文件??????101957??2011-01-23?20:29??ST.emma.automat\bin\org.eclipse.equinox.common_3.6.0.v20100503.jar
?????文件?????1068738??2011-01-23?20:16??ST.emma.automat\bin\org.eclipse.jface_3.6.0.I20100601-0800.jar
?????文件?????1738337??2011-01-23?20:15??ST.emma.automat\bin\swt.jar
?????文件????????4817??2011-01-23?20:57??ST.emma.automat\orange.jpeg
?????目錄???????????0??2011-01-23?21:05??ST.emma.automat\src\
?????目錄???????????0??2011-01-23?21:05??ST.emma.automat\src\automat\
?????文件????????2406??2011-01-24?15:31??ST.emma.automat\src\automat\SaleMachine.java
?????文件?????????512??2011-01-23?21:05??ST.emma.automat\src\automat\SaleMachineMessage.java
?????文件????????1906??2011-01-25?06:16??ST.emma.automat\src\automat\SaleMachineTest.java
?????目錄???????????0??2011-01-23?21:06??ST.emma.automat\src\gui\
?????文件????????2808??2011-01-23?21:05??ST.emma.automat\src\gui\SaleMachineGUI.java
?????文件??????107210??2011-01-23?20:30??ST.emma.automat\src\org.eclipse.core.commands_3.6.0.I20100512-1500.jar
?????文件??????101957??2011-01-23?20:29??ST.emma.automat\src\org.eclipse.equinox.common_3.6.0.v20100503.jar
?????文件?????1068738??2011-01-23?20:16??ST.emma.automat\src\org.eclipse.jface_3.6.0.I20100601-0800.jar
?????文件?????1738337??2011-01-23?20:15??ST.emma.automat\src\swt.jar
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