实现了按照计算器的基本功能设计用于基本运算的计算器软件，实现实数间的加、减、乘、除，以及取倒数运算（另亦可添加平方、开方等运算）。-Implemented in accordance with the basic functions of calculators designed for basic operations calculator software, to achieve real number between the add, subtract, multiply, divide,