数据结构是计算机专业的核心课程，是计算机科学的算法理论基础和软件设计的技术基础-computer data structure is the core professional courses computer science is the theoretical basis of algorithms and software design technology base

计算机软件基础——利用栈实现一位数表达式的计算-Computer software- use the stack to achieve a number of expressions calculation based on