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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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BDX
设计、编写和调试面向对象C++程序,实现任意两个同类数据比大小
的通用函数(模板),涵盖普通数值型数据之间的比较、两个字符串之间的比较
(按字典序)、两个复数之间的比较(按模大小)等,并通过主函数加以调用和
测试。(Design, writing and debugging of object-oriented C++ procedures to achieve similar data than the size of any two generic functions (template), covering general comparison between numerical data, the comparison between the two strings (lexicographically), two Comparison between complex numbers (modulo the size), and through the main function to be invoked and tested.)
- 2020-11-28 13:49:29下载
- 积分:1
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00
说明: 还是通讯录系统 增删改查 课程设计 本科学校要求的数据结构课程设计(Or address book CRUD the data structures required by the curriculum design undergraduate schools curriculum design)
- 2012-06-17 21:36:24下载
- 积分:1
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lianbiao
用c语言写的线性链表的创建、删除、插入、销毁代码(With c language to create a linear linked list, delete, insert, destroy code)
- 2011-10-13 23:06:55下载
- 积分:1
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KDTreeTest
一个KDtree的程序,包含建树过程和消耗的时间。(A KDtree procedures, including the contribution to the process and time consuming.)
- 2020-12-22 10:29:08下载
- 积分:1
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123
校园导航系统
1) 校园景点介:绍介相关景点的有关详细信息。
2) 最佳路线查询:查询校园中任意两点之间所有路线,并提供两点间最短的简单路径。
3) 关节点查询:提供校园图的关节点查询。
4) 多景点最佳路线查询:提供多个景点的最佳线路查询,即求途径这个景点的最佳路径。
(Campus Navigation System 1) campus attractions Introduction: Shao Jie-related attractions for more information. 2) The best route query: Query on campus all the routes between any two points, and provides a simple shortest path between two points. 3) joint points: the key points to provide the campus map queries. 4) The best route queries more attractions: multiple sites to provide the best route queries, that is seeking ways to this spot the best path.)
- 2011-08-25 08:56:05下载
- 积分:1
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8_queen
8_queen问题的一个自创的算法,还不错!(8_queen)
- 2009-10-21 11:49:24下载
- 积分:1
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Graph
数据结构中图的遍历Data structure traversal of center(Data structure traversal of center)
- 2013-11-28 10:53:29下载
- 积分:1
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dxsjjc
多项式加减乘 用数据节够得算法实现多项式的加减乘 原理简单易懂(suoxiangshi jiajiancheng)
- 2009-12-29 11:13:13下载
- 积分:1
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Set
使用C语言建立带头结点链表实现了集合。并进行了性能上的优化。(Achieve set using C to build list witch head node. And make optimization in performance.)
- 2009-11-18 13:29:05下载
- 积分:1