实验软装置（基于表达式的计算器ExprEval） 很不错的 有帮助于学习提高-Experimental soft device (based on expression calculator ExprEval) very good help in learning to improve

Java编写的表达式计算器, 即可以像我们书写表达式那样直接输入计算表达式, 程序自动进行运算, 支持加减乘除幂运算以及判断表达式如A?B C, 程序包含完整的Document和测试运行环境-Java calculator prepared expressions that can be done as we write the expression directly into the calculation expression, the program automatically compu

编译原理课程设计，词法分析，语法分析，语义分析等。-Compilation principle course design, lexical analysis, syntactic analysis, semantic analysis, etc.