ds3

各种排序算法的实现，如快速排序，冒泡排序，选择排序，堆排序，二分插入排序等(Implementation of various sorting algorithms, such as quick sort, bubble sort, selection sort, heap sort, binary insertion sort, etc.)

一．问题描述 对2006年度全国80多个城市的每天空气质量状况进行查询、排序等操作。 空气质量状况对象包括城市代码、城市名称、首要污染物、污染指数、污染物级别、空气状况、年、月、日 二、实验要求 1． 普通查询：输入城市名称和城市代码，分别查询该城市每天、每周、每月、每季度和全年的空气质量状况 例子：查询太原市2006年第8周的空气质量状况 2．统计查询： （1）输入城市名称和城市代码，分别查询该城市每周、每月、每季度和全年的空气质量为优、良、轻微污染、轻度污染、重污染的天数 例子：查询石家庄市2006年第2季度空气质量为轻微污染的总天数 （2）根据时间查询空气质量状况：输入周编号、月编号、季度编号或年编号，以及空气质量为优、良、轻微污染、轻度污染、重污染的天数，查找相应的城市名称 例子：查询2006年5月，空气被轻度污染3天以上的城市有哪些？ 3．排序查询 （1）输入周编号、月编号、季度编号或年编号，查询城市空气质量的排行榜 例子：查询2006年第6周，全国空气平均质量最好的前20个城市为哪些？ 三、数据文件 Data.txt(one. Problem Description of the air quality day in 2006 more than 80 cities nationwide query, sorting and other operations. Air Quality objects include city code, city name, the primary pollutant, pollution index, contaminant level, air condition, year, month, day two, experimental requirements 1. General Queries: Enter a city name and city codes, each query in the city daily, weekly, monthly, quarterly example air quality and full year: Queries air quality in Taiyuan first eight weeks of 2006 2. Statistical inquiry: (1) enter a city name and city codes, each query in the city weekly, monthly, quarterly and annual air quality as excellent, good, slight pollution, light pollution, heavy pollution days example: inquiry Shijiazhuang City in 2006 second quarter, the air quality is the total number of days a slight pollution (2) according to time of the query air quality conditions: enter the week number, month number, quarter number or in number, and the air quality is excellent, good, sli)

本程序解决的是：模拟类似计算机主、缓存的存储结构，当用户请求某个页面时，若某个页面已在缓存中，则直接从缓存中去取，不会产生失误（即未在缓存中命中），否则，就到主存中去取，代价变大。 本程序采用随机标记算法，即在在线标记算法的基础上，对于替换页面时，采用随机从未标记的缓存项中选出一项进行替换。 代码、文档详尽(Addressed in this program are: analog computer-like main, cache storage structure, when the user requests a page, a page in the cache directly from the cache to fetch, does not produce errors (that is, not in the cache in the hit), otherwise, to the main memory to fetch a consideration of larger. This program uses a random marking algorithm, online marking algorithm based on random never mark the cache entry selected a replacement for the replacement page. Code, documentation detailed)

通过学习奥赛培训课程，利用回溯加递归的编程技巧完成的迷宫问题(Training courses through learning Orsay, plus use of recursive programming skills back to complete the maze problem)

二查树遍历文件，可以用于程序测试，有喜欢的朋友要多多使用哦(Two check tree traversal file that can be used for program testing)

这个是C++编译的单链表，其中包括多种链表操作，是很好的学习资料。(This is a C++ compiler single linked list, which includes a variety of linked list operations, is a good learning materials.)

　广度优先搜索及深度优先搜索，用C语言实现，比较使用(Breadth-first search and depth first search, using C language, compared with)

讲解了循环单链表的建立，以及在链表中插入、删除、更改数据...(Explain the establishment of circular single linked list, and insert in the list, delete, change the data ...)

停车场管理系统 c语言实现 停车场拥有M个车位和一条进入停车场的便道，便道上最多停放N辆汽车。汽车要想进入车位，首先进入便道等候。若有空闲车位，则停车入位，否则在便道继续等候，直至有车位空出。若便道已经停满等候的汽车，后到达的汽车只能离开，选择其他停车场。设计一个停车场管理系统，模拟停车场的运作，并统计停车场的收入。(Parking Management System with M c language parking spaces and a sidewalk into the parking lot, parked up on the sidewalk N cars. To enter the car parking spaces, first into the pavement waiting. If free parking, the parking into place, or in the sidewalk to wait until the needed spot. If the sidewalk is already full of parked cars waiting, after the arrival of the vehicle to leave, choose a parking lot. Designing a car park management systems, simulation parking operations and parking revenue statistics.)

说明：  数据结构：Huffman编码。哈夫曼编码是哈夫曼树的一个应用。哈夫曼编码应用广泛，如JPEG中就应用了哈夫曼编码。 哈夫曼树又称最优二叉树，是一种带权路径长度最短的二叉树。(Data structure: Huffman coding. Huffman coding is an application of the Huffman tree. Huffman coding is widely used, such as JPEG in the application of the Huffman coding. Huffman tree, also known as the best binary tree is a weighted shortest path length binary tree.)