一个用C#写成的简易计算器程序，除了简单地加减乘除功能外，还可进行开方、幂运算、 三角函数、十进制转二进制等功能，功能还是挺强大滴！-A C# written in simple calculator program, in addition to simple arithmetic functions, but also for prescribing, exponentiation, trigonometric functions, decimal binary transfer funct