java 计算器

功能键：



MC键：清除存储器中数据



CE键：清除当前显示的数据



C键：清除所有数据



MR键：将存于存储器中的数据显示出来



MS键：将显示的数据存储在存储器中



M+键：将显示的数据与存储器中的数据相加并进行存储





sqrt：开平方-java calculator function keys: MC key: CE key to clear the data in memory: clear the currently displayed data C key: MR button to clear all the data: the data stored in the memory display MS key: will display the data stored in memory M+ button: to display the data and the data memory to store the sum and sqrt: square root