-
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
-
Untitled
航迹起始中的逻辑航迹起始算法源代码,本代码具有很好的航迹起始效果!
(Track initiation logic for track initiation algorithm source code, this code has the effect of track initiation)
- 2012-06-06 21:35:20下载
- 积分:1
-
fml
已知二叉树的先序遍历结果,建立二叉树并输出其先序、中序、后序遍历结果(Build a binary tree and print the results of preorder, midorder and postorder traversals based on the known result of preorder traversal)
- 2015-02-15 15:20:26下载
- 积分:1
-
sgu-499
题意:给你n个数,求出两两组合的最大公约数
类似打素数表的做法
(Meaning of the questions: to give you the number n, find greatest common divisor of a similar combination twenty-two hit the practice table of prime numbers)
- 2011-08-30 21:56:59下载
- 积分:1
-
Introduction-to-Algorithms
算法导论的英文版,讲解算法的非常经典的书。(English version of Introduction to Algorithm. A classical book to teach algorithm.)
- 2015-09-14 16:44:34下载
- 积分:1
-
LongestIncreasingSequence
找出数组A中最长的递增序列的长度,使用动态规划算法,复杂度为O(N*N)。(Find the longest increasing sequence)
- 2011-09-05 17:36:27下载
- 积分:1
-
mataqipan
马踏棋盘的贪心算法,8*8棋盘,基本上不用回溯。(horse riding chessboard of the greedy algorithm, 8* 8 chessboard, basically not retroactive.)
- 2006-05-30 20:05:17下载
- 积分:1
-
001
二叉树的中序遍历,先序遍历以及后序遍历的算法(Binary tree in preorder traversal, preorder traversal and postorder traversal algorithm)
- 2012-06-03 23:26:44下载
- 积分:1
-
太阳能电池参数计算器 升级版
太阳能电池参数计算,可以快速方便计算电流,电压,填充因子等参数(Solar cell parameter calculation)
- 2017-11-23 21:30:46下载
- 积分:1
-
2007327
带权有向以及无向图的各种操作,适合数据结构初学者使用,是图那一章的重点(belt and the right to have no plans to the various operations, data structure suitable for beginners, is the chief focus of the chapter)
- 2007-04-22 23:49:54下载
- 积分:1