算术表达式求值完整课程设计报告-对于基本的算术表达式，以字符序列的形式从终端进行输入，要求语法正确的，不含变量，按照算术运算优先级顺序，实现基本算术表达式的运算

Arithmetic expression evaluation Complete course design report - For basic arithmetic expressions, input from the terminal in the form of a sequence of characters, requiring correct syntax, no variables, and operation of basic arithmetic expressions in accordance with the order of priority of arithmetic operations process.