1．进一步掌握栈的基本操作的实现。 2．掌握栈在算术表达式的计算方面的应用。 -1. Further understand the basic operation of the stack implementation. 2. Control stack in the calculation of arithmetic expression applications.

车厢调度:程序对栈的任何存取（即更改，读取和状态判别等操作必须借助于基本操作。-Train scheduling: proceedings of the stack of any access (that is, changing, reading and state identification must be by means of basic operations such as Operation.