Description: Problem Description: An arithmetic expression is an operand (operand), operator (operator) and boundary character (delimiter) composition. Assuming a positive integer operands, operators, containing only addition, subtraction and other four operators, boundary character has left and right parentheses and expressions start and end symbol # , such as:# (7+ 15)* (23-28/4)#. Introducing expressions start and end character is for convenience. Programming using the operator precedence Evaluate arithmetic expressions.
Basic requirements: reads a legitimate arithmetic expressions, output the correct result the keyboard display change process sequence and stack input operand types expanded to real numbers.
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main.c
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