哈希表的设计与实现。设计哈希表实现电话号码查询系统。基本要求：（1）设每个记录有一列数据项：电话号码、用户名、地址（2）从键盘输入各记录，分别以电话号码和用户名为关键字建立哈希表；（3）采用再哈希法解决冲突（4）查找并显示给定电话号码的记录；（5）查找并显示给定用户名的记录（5）在哈希函数确定的前提下，尝试各种不同类型处理冲突的方法（至少两种），考察平均查找长度的变化。 -Design and Implementation of the hash table. The design of the hash table telephone number inquiry system. Basic requirements: (1) set each record has a data item: telephone number, user name, address (2) from the keyboard to enter each record, phone number and user name keyword, the hash table　(3) re-hash method to resolve the conflict (4) Find and show it to set the phone number of record　(5) to find and display to the given user name records (5) in the hash function to determine the premise, try a variety of different types of conflict method (at least two) investigated the changes of the average search length.