Introduction - If you have any usage issues, please Google them yourself
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~ ---- calculator with a user interface can be calculated addition, subtraction, multiplication and division, but can not be calculated the four fundamental operations with brackets, runs, Enter a digit in turn, operation symbols and the second two digits can output results, such as: calculation of 65+79, followed by enter " 65 " ," +" ," 85" , but the program if To calculate a number, you must enter two numbers, if you want to enter the 8, you must enter 08 Caixing ~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~