三道几何题：hdu 1007、hdu 2289、poj 3714

组合问题，从M个不同字符中任取N个字符的所有组合-Combination of issues, from the M different characters of any N-character check all combinations

红黑树数据结构的c实现-RED-BLACK TREE data structure to achieve the c

本系统是一简单的物资管理系统，能够实现物资的基本信息，入库信息，出库信息，借用情况的管理等功能，适合初学者下载-The system is a simple material management system, able to realize the basic material of information, storage information, a database of information, loan management and other functions, suitable for beginners to download

一款用C#编写的精简ERP系统，帮你了解ERP系统和C#开发的方法

算法：华容道问题的启发式搜索。寻求一种最优解的快速算法。-Algorithm: Huarong issues heuristic search.

ado and access operatiion such as insert delet update -ado and access operatiionsuch as insert delet update

设置信号放大器，在包中有详细的代码说明及注释，通过树的数据结构实现信号放大器的设置~-Set-signal amplifier, in the package are detailed code descriptions and notes, through the tree data structure to achieve signal amplifier settings ~

单比特树查找算法，是用于路由查找的，内含有路由查找相关资料-Monobit tree-search algorithm is used to identify the routing, which contain routing information Search

将前缀表达式转为中缀表达式，并画出所建的树-To prefix infix expression to expression, and draw the tree built

数据结构单链表的实现,包含链表元素的删除,查找,插入-single linked list data structure to achieve List contains elements delete, retrieve, insert