主类Main1

/**
	 * 计算无括号加减
	 * @param formula 公式
	 * @return
	 */
	public static double accountMinusAndAdd(String formula)
	{
		Shed shed = new Shed();
		char[] c = formula.toCharArray();
		String tmp = "";
		boolean isAcc = false;
		for(int i = 0; i < c.length; i++)
		{
			if(c[i] == '+' || c[i] == '-')
			{
				//是否计算
				if(isAcc)
				{
					String operator = shed.get();
					String strX = shed.get();
					double x = Double.parseDouble(strX);
					double y = Double.parseDouble(tmp);
					tmp = "" + account(x, y, operator);
					isAcc = false;
				}
				else
				{
					isAcc = true;
				}
				shed.put(tmp);
				shed.put(c[i] + "");
				tmp = "";
				continue;
			}
			tmp += c[i];
		}
		shed.put(tmp);
		//计算
		if(isAcc)
		{
			String strY = shed.get();
			double y = Double.parseDouble(strY);
			String operator = shed.get();
			String strX = shed.get();
			double x = Double.parseDouble(strX);

			tmp = "" + account(x, y, operator);
			shed.put(tmp);
		}
		return Double.parseDouble(shed.get());
	}

	/**
	 * 计算无括号乘除
	 * @param formula 公式
	 * @return
	 */
	public static String accountMultiplyAndDivide(String formula)
	{
		Shed shed = new Shed();
		char[] c = formula.toCharArray();

		String tmp = "";
		boolean isAcc = false;
		for(int i = 0; i < c.length; i++)
		{
			if(c[i] == '*' || c[i] == '/' || c[i] == '+' || c[i] == '-')
			{
				//是否计算
				if(isAcc)
				{
					String operator = shed.get();
					String strX = shed.get();
					double x = Double.parseDouble(strX);
					double y = Double.parseDouble(tmp);
					tmp = "" + account(x, y, operator);
					isAcc = false;
				}
				if(c[i] == '*' || c[i] == '/')
				{
					isAcc = true;
				}

				shed.put(tmp);
				shed.put(c[i] + "");
				tmp = "";
				continue;
			}
			tmp += c[i];
		}

		shed.put(tmp);
		//是否计算
		if(isAcc)
		{
			String strY = shed.get();
			double y = Double.parseDouble(strY);
			String operator = shed.get();
			String strX = shed.get();
			double x = Double.parseDouble(strX);

			tmp = "" + account(x, y, operator);
			shed.put(tmp);
		}

		//重组公式
		String gs = "";
		for(int i = 0; i < shed.list.size(); i++)
		{
			gs += shed.list.get(i);
		}

		return gs;
	}