Introduction - If you have any usage issues, please Google them yourself
Achieve the function of the calculator. The main functional requirements are as follows: ⑴ calculated to an arbitrary constant arithmetic expressions of addition, subtraction, division and multiplication. Operands default decimal integer and fractional other options as binary, octal and hexadecimal. (2) achieve calculator' s other functions, such as seeking logarithmic, square root. ⑶ requires the use of a graphical interface. The man-machine interface is friendly. Such as user input error in the calculation can be modified before