(1) application arithmetic operators: including +, -, *,/, % and the + +, the decrement - operator, such as

(2) the arithmetic expression oneself write,

(3) data types include: int, float, double, char,

(4) character constants,

(5) 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),

(6) write operation result,