Introduction - If you have any usage issues, please Google them yourself
(1) set operator operand stack stack and operator precedence relations aided analysis (2) a sequence of characters in the reading, the completion of operator and operand processing, and the corresponding operation (3) In computing the number of identification at the same time , to form the character sequence into a float type data form (4) Enter the character sequence, the operand is not necessarily a number, may be more digits, such as 16+32 (6) in the program will use two stacks: the operand stack and the operator stack, respectively, float-type data and character data, thinking in the same program, how to deal with two different data types?