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@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
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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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Graph
采用邻接矩阵实现有向网的存储,建立有向网,并实现单源最短路径算法。(The realization of the use of adjacency matrix to the network storage, the establishment of the network, and to achieve single-source shortest path algorithm.)
- 2007-12-25 16:55:03下载
- 积分:1
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20070320list
包括链表的各项操作,添加、删除、修改等。还包括单项连标和双向链表。(including the operation, add, delete, revise. Also including individual targets and even two-way linked list.)
- 2007-03-20 10:39:42下载
- 积分:1
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elevator
电梯模拟,实现一个模拟电梯的环境,用C程序实现的,封装良好(elevator modify)
- 2021-04-22 15:38:48下载
- 积分:1
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Tetris
使用很好的数据结构,程序运行效率高,界面简洁美观。(Good data structure, high efficiency, simple and beautiful interface.)
- 2013-03-27 10:51:16下载
- 积分:1
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FRFT-algorim
常在该网站下载资料,也想分享些材料上去,这个资料是FRFT算法(Often the site to download information, but also want to share some material up, this information is FRFT algorithm)
- 2020-07-04 13:00:02下载
- 积分:1
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vbsort
vb实现的排序算法演示vb实现的排序算法演示.冒泡、选择、折半等多种排序算法(vb sort demodemodemodemodemovb sort demodemodemodemodemo)
- 2011-10-09 10:21:28下载
- 积分:1
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C-integer-linear-sequence
对元素类型为整型的顺序存储的线性表进行插入、删除和查找操作(C++)。(C integer linear sequence of stored data table insert, delete and search operations)
- 2011-11-20 11:13:40下载
- 积分:1
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5-source--code-of-DS--PRO
数据结构课上老师布置的5个小项目的源代码,分别是汽车过河,一元多项式,迷宫,日历,BFS_DFS(failed to translate)
- 2011-05-18 17:01:17下载
- 积分:1