说明：  数据结构课程设计-栈的实现及应用，实现功能：1.数制转换2.括号区配3.行编辑4.表达式求值
(Data structure the curriculum design- the realization and application stack, the realization of function: 1. The number of system conversion 2. Brackets with District 3. Line editor 4. Expression evaluation)