功能：
（1）整数计算器，包括“+”、“-”、“*”、“/”的四则运算。
??? （2）计算器中含有进制转换功能。
（3）房贷计算器，通过“贷款额”、“月利息”和“还款月数”的输入，可计算“累计还款额”和“月还款额”。
（4）“还款月数”可通过旋钮控件。
（5）包含“整数计算器”和“贷款计算器”选项卡
（6）可通过选项卡进行整数和房贷计算器的切换。(Function:
(1) integer calculator, including "+", "-", "*", "/" four operations.
(2) contains a hexadecimal conversion function calculator.
(3) the loan calculator, through the input of "loan amount", "monthly interest" and "repayment month number", can calculate cumulative sum and monthly repayment amount.
(4) "the number of repayment months" can be used by the knob control.
(5) include the "integer calculator" and the "loan calculator" tab
(6) the switchover of integer and mortgage calculator can be carried out through the tabs.)