Design simple interactive calculator, function as follows: (1) calculator function and Windows operating system with the standard system of the same type of calculator.
设计简易交互式计算器，功能如下：(1)计算器功能与Windows操作系统带的标准型的计算器系统相同。
Design simple interactive calculator, function as follows: (1) calculator function and Windows operating system with the standard system of the same type of calculator.
设计简易交互式计算器，功能如下：(1)计算器功能与Windows操作系统带的标准型的计算器系统相同。
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