package?文本計(jì)算器;

import?java.util.ArrayList;
import?java.util.Stack;

/**?
*?文本計(jì)算器
*?@author?YuJing
*?@date?2017年5月8日?下午3:57:49?
*/
public?class?計(jì)算器?{
	private?final?static?String?ERR_NOT_END_VALID?=?“你表達(dá)的最后一個(gè)字符必須是‘#‘!“;
	private?final?static?String?ERR_PARENTHESE_NOT_PAIR?=?“括號不配對!“;
	private?final?static?String?ERR_CHAR_NOT_SUPPORT?=?“不支持的字符！“;
	private?final?static?String?ERR_OPERATION_NOT_SUPPORTED?=?“不支持的操作！“;
	private?final?static?String?ERR_OPERATOR_NOT_VALID?=?“?不支持double數(shù)據(jù)！“;
	private?final?static?String?ERR_UNKNOWN?=?“未知錯(cuò)誤！“;
	private?static?boolean?isDouble;//?輸入的類型是否是double類型

	//?傳入字符串表達(dá)式如：“1-（2*2）+6“
	public?static?String?eval（String?expression）?{
		expression?=?expression.replaceAll（“?“?““）;//?去掉全部空格
		expression?+=?“#“;//?#為結(jié)束標(biāo)記
		ArrayList?li