-
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
-
calc
这是我在学习数据结构做练习时写的一个小程序,功能是在命令行下进行形如:23+34*3/4+(3*6+10)的四则运算,支持+,-,*,/,(,)进行整数运算。(This is a simple code about data structure.It uses to carry on four arithmetic operations with parenthesis.But now it only supports integer.)
- 2009-12-28 12:15:21下载
- 积分:1
-
a
说明: 进程死锁.资源分配图的绘制 建立所需数据结构;
使用题目21存成的资源分配图的文件作为输入;
编写资源分配图化简算法;
每化简一步,在屏幕上显示化简的当前结果;
最后给出结论,是否死锁,如思索给出死锁的进程及资源;
(Process deadlock. Resource allocation mapping establish the required data structures Use title 21 deposit into resource allocation graph file as input writing resource allocation map simplification algorithm Each simplification step, on-screen display simplification of the current result Finally, the conclusion of a deadlock, deadlock is given as thinking processes and resources )
- 2013-07-04 19:50:58下载
- 积分:1
-
structure-array-code
根据队列搜索算法的基本思想,现设计了一个简单的结构体数组如下定义代码所示。此结构体数组具备控制结点搜索和存储结点信息和路径的功能,可以较好的实现TDN的最小时间路径搜索。(Search algorithm based on the basic idea of the queue is now designed a simple structure array as defined code. This structure array with the control node and storage node information search and path functions, you can achieve better TDN minimum time path search.)
- 2013-10-09 14:35:43下载
- 积分:1
-
@163
数值计算方法中高斯主元素消元法 在vc环境中运行 用于解方程组(Numerical methods in the Gaussian elimination method, the main elements of the environment in vc run for the solution of equations)
- 2011-10-19 20:28:39下载
- 积分:1
-
Nqueen
n皇后问题构造法实现,比起启发式修补运行时间较长。(n Queen realize the issue of construction method, compared to a longer run-time heuristic repair.)
- 2008-05-16 12:45:32下载
- 积分:1
-
BeiDa_ACM1702
北大ACM1702题 转换为3进制
很经典(NULL)
- 2009-12-08 11:31:40下载
- 积分:1
-
bfs
这是BFS算法的实现。用C语言实现的。好好学习吧。(This is achieved BFS algorithm. Implemented using C language. Learn it.)
- 2013-12-05 15:56:50下载
- 积分:1
-
BFS
迷宫问题 队列求解 界面还不完善 可以自己添加(Maze problem solving interface queue is not perfect you can add your own)
- 2013-12-26 22:08:58下载
- 积分:1
-
xx
说明: 数据结构实验报告链表的操作,包括创建空链表、插入、删除节点等(Experimental Report list data structure operations, including creating an empty list, insert, delete nodes, etc.)
- 2009-11-25 08:36:26下载
- 积分:1