By keyboard input, an arithmetic type and output the operation type and operation as a result, the output format see proof,
12 * 12 * 34 for example: input, output, 34=408; Input is not arithmetic type, output "non arithmetic";

Input arithmetic type divisor is 0, then output "in addition to the type of the denominator is zero,"
(1) application switch - completed case statement,

(2) the data input from the keyboard, joining instructions for data input and output requirements (as a data is output, one line of text from the keyboard input and output on the screen),

(3) write operation result,