计算器,可以计算加减乘除等四则运算。当除数为0的时候会显示错误。支持连续输入进行计算。输入数值可以为浮点数-Calculator, can be calculated, such as addition and subtraction multiplication and division four computing. When the divisor is 0, when will display an error. Support for the importation calculated. Enter the value for float