是一个印刷体数学表达式识别系统.能识别一些一般的印刷体数学表达式，为工程者计算者提供了方便，减轻了他们的工作量-A printed mathematical expression recognition system. Printed to identify some general mathematical expression for the project is calculated to provide a convenient, reducing their workload

数据结构编程示例，包含表达式求值，多项式计算，哈弗曼，内部排序，停车场，长整数等常用功能-Data structure programming examples, including expression, polynomial, Huffman, internal sorting, parking, long integers and other common functions