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liu
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)
- 2017-04-07 10:58:37下载
- 积分:1
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tree
二叉树的先序遍历。采用递归实现。释放资源时用了后序遍历。(Preorder traversal of a binary tree. Recursive implementation. Release resources used after preorder.)
- 2013-07-09 13:39:31下载
- 积分:1
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Is_BST
This is a C++ code. It finds out if the tree is a binary search tree (BST)or not, where the BST is one of data structures types.
- 2012-02-02 05:45:59下载
- 积分:1
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QuickSort
快速排序,用数组的存储结构,实现数的排序。共有八组随机数据,还能够计算出每组数据的处理时间,最终得到平均时间。(Quicksort array storage structure, to achieve the sort of number. A total of eight sets of random data, but also be able to calculate the processing time of each data, and eventually obtain the average time.)
- 2013-03-22 21:21:16下载
- 积分:1
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sy1.cpp
实验内容:
建立一个包含图书(书号,书名,定价)信息的的链表,并具有如下功能:
(1) 根据指定图书个数,逐个输入图书信息;
(2) 根据书名进行查找,返回此书的书号和定价;
(3) 根据指定的位置可返回相应的图书信息(书号,书名,定价);
(4) 给定一个图书信息,插入到表中指定的位置;
(5) 删除指定位置的图书记录;
(6) 统计表中图书个数。
(It is a good c++.)
- 2012-10-26 15:23:15下载
- 积分:1
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baiji
百鸡算法是一种简单的逻辑算法,通过不同的鸡不同的价钱,得出大鸡小鸡的个数(Typical code for white chicken algorithm)
- 2012-06-02 16:31:30下载
- 积分:1
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deep-copy
该代码实现了深拷贝的问题,对于深拷贝进行了一系列的介绍,并且显示其与浅拷贝的区别。(A deep copy of the code issues a series of deep copy for presentation, and shows the difference between a shallow copy.)
- 2014-01-03 10:46:48下载
- 积分:1
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a-linked-list-and-related-processing
链表的建立及相关处理,包括排序,删除,初始化,增加,删除等等,且程序已运行通过。(The establishment of a linked list and related processing, including sorting, delete, initialization, increase, delete, etc., and the program has been run through
)
- 2014-01-13 23:56:27下载
- 积分:1
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Haffman
将一组数组转换为哈夫曼编码,使用数据结构中的二叉树功能实现(Convert an array to Haffman code)
- 2016-01-30 14:56:20下载
- 积分:1
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HuffmanTree
用c++实现的haffman tree 小程序,仅供参考 。 (The the haffman tree applet realized with c++ for reference only.)
- 2013-03-14 16:38:15下载
- 积分:1