cize课程表
① C语言中,编写一个课程表查询程序,那个星期用什么来定义
用结构类型来定义!
里面的星期用enum类型!把所有的星期都列出来
② 求用c语言写一个课程表
需要的可以私聊
③ Student 学生表 ,Course 课程表 ,SC成绩表 ,Teacher 教师表,sql操作运用
建表语句
CREATE TABLE student
(
s# INT,
sname nvarchar(32),
sage INT,
ssex nvarchar(8)
)
CREATE TABLE course
(
c# INT,
cname nvarchar(32),
t# INT
)
CREATE TABLE sc
(
s# INT,
c# INT,
score INT
)
CREATE TABLE teacher
(
t# INT,
tname nvarchar(16)
)
插入测试数据语句
insert into Student select 1,N'刘一',18,N'男' union all
select 2,N'钱二',19,N'女' union all
select 3,N'张三',17,N'男' union all
select 4,N'李四',18,N'女' union all
select 5,N'王五',17,N'男' union all
select 6,N'赵六',19,N'女'
insert into Teacher select 1,N'叶平' union all
select 2,N'贺高' union all
select 3,N'杨艳' union all
select 4,N'周磊'
insert into Course select 1,N'语文',1 union all
select 2,N'数学',2 union all
select 3,N'英语',3 union all
select 4,N'物理',4
insert into SC
select 1,1,56 union all
select 1,2,78 union all
select 1,3,67 union all
select 1,4,58 union all
select 2,1,79 union all
select 2,2,81 union all
select 2,3,92 union all
select 2,4,68 union all
select 3,1,91 union all
select 3,2,47 union all
select 3,3,88 union all
select 3,4,56 union all
select 4,2,88 union all
select 4,3,90 union all
select 4,4,93 union all
select 5,1,46 union all
select 5,3,78 union all
select 5,4,53 union all
select 6,1,35 union all
select 6,2,68 union all
select 6,4,71
问题
问题: 1、查询“001”课程比“002”课程成绩高的所有学生的学号; select a.S# from (select s#,score from SC where C#='001') a,(select s#,score from SC where C#='002') b where a.score>b.score and a.s#=b.s#; 2、查询平均成绩大于60分的同学的学号和平均成绩; select S#,avg(score) from sc group by S# having avg(score) >60; 3、查询所有同学的学号、姓名、选课数、总成绩; select Student.S#,Student.Sname,count(SC.C#),sum(score) from Student left Outer join SC on Student.S#=SC.S# group by Student.S#,Sname 4、查询姓“李”的老师的个数; select count(distinct(Tname)) from Teacher where Tname like '李%'; 5、查询没学过“叶平”老师课的同学的学号、姓名; select Student.S#,Student.Sname from Student where S# not in (select distinct( SC.S#) from SC,Course,Teacher where SC.C#=Course.C# and Teacher.T#=Course.T# and Teacher.Tname='叶平'); 6、查询学过“001”并且也学过编号“002”课程的同学的学号、姓名; select Student.S#,Student.Sname from Student,SC where Student.S#=SC.S# and SC.C#='001'and exists( Select * from SC as SC_2 where SC_2.S#=SC.S# and SC_2.C#='002'); 7、查询学过“叶平”老师所教的所有课的同学的学号、姓名; select S#,Sname from Student where S# in (select S# from SC ,Course ,Teacher where SC.C#=Course.C# and Teacher.T#=Course.T# and Teacher.Tname='叶平' group by S# having count(SC.C#)=(select count(C#) from Course,Teacher where Teacher.T#=Course.T# and Tname='叶平')); 8、查询课程编号“002”的成绩比课程编号“001”课程低的所有同学的学号、姓名; Select S#,Sname from (select Student.S#,Student.Sname,score ,(select score from SC SC_2 where SC_2.S#=Student.S# and SC_2.C#='002') score2 from Student,SC where Student.S#=SC.S# and C#='001') S_2 where score2 <score; 9、查询所有课程成绩小于60分的同学的学号、姓名; select S#,Sname from Student where S# not in (select S.S# from Student AS S,SC where S.S#=SC.S# and score>60); 10、查询没有学全所有课的同学的学号、姓名; select Student.S#,Student.Sname from Student,SC where Student.S#=SC.S# group by Student.S#,Student.Sname having count(C#) <(select count(C#) from Course); 11、查询至少有一门课与学号为“1001”的同学所学相同的同学的学号和姓名; select distinct S#,Sname from Student,SC where Student.S#=SC.S# and SC.C# in (select C# from SC where S#='1001'); 12、查询至少学过学号为“001”同学所有一门课的其他同学学号和姓名; select distinct SC.S#,Sname from Student,SC where Student.S#=SC.S# and C# in (select C# from SC where S#='001'); 13、把“SC”表中“叶平”老师教的课的成绩都更改为此课程的平均成绩; update SC set score=(select avg(SC_2.score) from SC SC_2 where SC_2.C#=SC.C# ) from Course,Teacher where Course.C#=SC.C# and Course.T#=Teacher.T# and Teacher.Tname='叶平'); 14、查询和“1002”号的同学学习的课程完全相同的其他同学学号和姓名; select S# from SC where C# in (select C# from SC where S#='1002') group by S# having count(*)=(select count(*) from SC where S#='1002'); 15、删除学习“叶平”老师课的SC表记录; Delect SC from course ,Teacher where Course.C#=SC.C# and Course.T#= Teacher.T# and Tname='叶平'; 16、向SC表中插入一些记录,这些记录要求符合以下条件:没有上过编号“003”课程的同学学号、2、 号课的平均成绩; Insert SC select S#,'002',(Select avg(score) from SC where C#='002') from Student where S# not in (Select S# from SC where C#='002'); 17、按平均成绩从高到低显示所有学生的“数据库”、“企业管理”、“英语”三门的课程成绩,按如下形式显示: 学生ID,,数据库,企业管理,英语,有效课程数,有效平均分 SELECT S# as 学生ID ,(SELECT score FROM SC WHERE SC.S#=t.S# AND C#='004') AS 数据库 ,(SELECT score FROM SC WHERE SC.S#=t.S# AND C#='001') AS 企业管理 ,(SELECT score FROM SC WHERE SC.S#=t.S# AND C#='006') AS 英语 ,COUNT(*) AS 有效课程数, AVG(t.score) AS 平均成绩 FROM SC AS t GROUP BY S# ORDER BY avg(t.score) 18、查询各科成绩最高和最低的分:以如下形式显示:课程ID,最高分,最低分 SELECT L.C# As 课程ID,L.score AS 最高分,R.score AS 最低分 FROM SC L ,SC AS R WHERE L.C# = R.C# and L.score = (SELECT MAX(IL.score) FROM SC AS IL,Student AS IM WHERE L.C# = IL.C# and IM.S#=IL.S# GROUP BY IL.C#) AND R.Score = (SELECT MIN(IR.score) FROM SC AS IR WHERE R.C# = IR.C# GROUP BY IR.C# );
自己写的:select c# ,max(score)as 最高分 ,min(score) as 最低分 from dbo.sc group by c# 19、按各科平均成绩从低到高和及格率的百分数从高到低顺序 SELECT t.C# AS 课程号,max(course.Cname)AS 课程名,isnull(AVG(score),0) AS 平均成绩 ,100 * SUM(CASE WHEN isnull(score,0)>=60 THEN 1 ELSE 0 END)/COUNT(*) AS 及格百分数 FROM SC T,Course where t.C#=course.C# GROUP BY t.C# ORDER BY 100 * SUM(CASE WHEN isnull(score,0)>=60 THEN 1 ELSE 0 END)/COUNT(*) DESC 20、查询如下课程平均成绩和及格率的百分数(用"1行"显示): 企业管理(001),马克思(002),OO&UML (003),数据库(004) SELECT SUM(CASE WHEN C# ='001' THEN score ELSE 0 END)/SUM(CASE C# WHEN '001' THEN 1 ELSE 0 END) AS 企业管理平均分 ,100 * SUM(CASE WHEN C# = '001' AND score >= 60 THEN 1 ELSE 0 END)/SUM(CASE WHEN C# = '001' THEN 1 ELSE 0 END) AS 企业管理及格百分数 ,SUM(CASE WHEN C# = '002' THEN score ELSE 0 END)/SUM(CASE C# WHEN '002' THEN 1 ELSE 0 END) AS 马克思平均分 ,100 * SUM(CASE WHEN C# = '002' AND score >= 60 THEN 1 ELSE 0 END)/SUM(CASE WHEN C# = '002' THEN 1 ELSE 0 END) AS 马克思及格百分数 ,SUM(CASE WHEN C# = '003' THEN score ELSE 0 END)/SUM(CASE C# WHEN '003' THEN 1 ELSE 0 END) AS UML平均分 ,100 * SUM(CASE WHEN C# = '003' AND score >= 60 THEN 1 ELSE 0 END)/SUM(CASE WHEN C# = '003' THEN 1 ELSE 0 END) AS UML及格百分数 ,SUM(CASE WHEN C# = '004' THEN score ELSE 0 END)/SUM(CASE C# WHEN '004' THEN 1 ELSE 0 END) AS 数据库平均分 ,100 * SUM(CASE WHEN C# = '004' AND score >= 60 THEN 1 ELSE 0 END)/SUM(CASE WHEN C# = '004' THEN 1 ELSE 0 END) AS 数据库及格百分数 FROM SC
21、查询不同老师所教不同课程平均分从高到低显示
SELECT max(Z.T#) AS 教师ID,MAX(Z.Tname) AS 教师姓名,C.C# AS 课程ID,MAX(C.Cname) AS 课程名称,AVG(Score) AS 平均成绩
FROM SC AS T,Course AS C ,Teacher AS Z
where T.C#=C.C# and C.T#=Z.T#
GROUP BY C.C#
ORDER BY AVG(Score) DESC
22、查询如下课程成绩第 3 名到第 6 名的学生成绩单:企业管理(001),马克思(002),UML (003),数据库(004)
[学生ID],[学生姓名],企业管理,马克思,UML,数据库,平均成绩
SELECT DISTINCT top 3
SC.S# As 学生学号,
Student.Sname AS 学生姓名 ,
T1.score AS 企业管理,
T2.score AS 马克思,
T3.score AS UML,
T4.score AS 数据库,
ISNULL(T1.score,0) + ISNULL(T2.score,0) + ISNULL(T3.score,0) + ISNULL(T4.score,0) as 总分
FROM Student,SC LEFT JOIN SC AS T1
ON SC.S# = T1.S# AND T1.C# = '001'
LEFT JOIN SC AS T2
ON SC.S# = T2.S# AND T2.C# = '002'
LEFT JOIN SC AS T3
ON SC.S# = T3.S# AND T3.C# = '003'
LEFT JOIN SC AS T4
ON SC.S# = T4.S# AND T4.C# = '004'
WHERE student.S#=SC.S# and
ISNULL(T1.score,0) + ISNULL(T2.score,0) + ISNULL(T3.score,0) + ISNULL(T4.score,0)
NOT IN
(SELECT
DISTINCT
TOP 15 WITH TIES
ISNULL(T1.score,0) + ISNULL(T2.score,0) + ISNULL(T3.score,0) + ISNULL(T4.score,0)
FROM sc
LEFT JOIN sc AS T1
ON sc.S# = T1.S# AND T1.C# = 'k1'
LEFT JOIN sc AS T2
ON sc.S# = T2.S# AND T2.C# = 'k2'
LEFT JOIN sc AS T3
ON sc.S# = T3.S# AND T3.C# = 'k3'
LEFT JOIN sc AS T4
ON sc.S# = T4.S# AND T4.C# = 'k4'
ORDER BY ISNULL(T1.score,0) + ISNULL(T2.score,0) + ISNULL(T3.score,0) + ISNULL(T4.score,0) DESC);
23、统计列印各科成绩,各分数段人数:课程ID,课程名称,[100-85],[85-70],[70-60],[ <60]
SELECT SC.C# as 课程ID, Cname as 课程名称
,SUM(CASE WHEN score BETWEEN 85 AND 100 THEN 1 ELSE 0 END) AS [100 - 85]
,SUM(CASE WHEN score BETWEEN 70 AND 85 THEN 1 ELSE 0 END) AS [85 - 70]
,SUM(CASE WHEN score BETWEEN 60 AND 70 THEN 1 ELSE 0 END) AS [70 - 60]
,SUM(CASE WHEN score < 60 THEN 1 ELSE 0 END) AS [60 -]
FROM SC,Course
where SC.C#=Course.C#
GROUP BY SC.C#,Cname;
24、查询学生平均成绩及其名次
SELECT 1+(SELECT COUNT( distinct 平均成绩)
FROM (SELECT S#,AVG(score) AS 平均成绩
FROM SC
GROUP BY S#
) AS T1
WHERE 平均成绩 > T2.平均成绩) as 名次,
S# as 学生学号,平均成绩
FROM (SELECT S#,AVG(score) 平均成绩
FROM SC
GROUP BY S#
) AS T2
ORDER BY 平均成绩 desc;
原文地址:http://www.cnblogs.com/qixuejia/p/3637735.html
④ 数据库中包含学生表、课程表、学生选课表3个表,分别是什么
1、SELECT 课程号, 课程名, 课程学分
FROM 课程 WHERE 课程号 IN(SELECT 课程号
FROM 选课
GROUP BY 课程号
HAVING COUNT(学生号) BETWEEN 2 AND 4 )
2、SELECT MAX(成绩) - MIN(成绩) AS 分数之差
FROM 选课
倘若要每门课程相差
SELECT 课程, MAX(成绩) - MIN(成绩) AS 分数之差
FROM 选课
GROUP BY 课程
⑤ 给定数据库中,包括“学生表”,“课程表”,“选课表”等三个数据表,表结构如下: 学生表:学号(C,6),姓
用LINQ(语言集成查询)完成你说的这些任务很方便,具体的细节问题还得你自己做。下面举出两个例子供你参考,这两个例子用数组代替数据库,对数据库也可用同样的方法。
例1,用bool值作关键字区分两组的结果,注意group子句中的表达式产生的结果。
public class Student
{
public string Name { get; set; }
public int ID { get; set; }
public List<int> Scores;
}
public static List<Student> GetStudents()
{
//实例化数据源,注意各成员内部成绩序列的初始化
List<Student> students = new List<Student>
{
new Student {Name="张勇", ID=1, Scores= new List<int> {97, 72, 81, 60}},
new Student {Name="王磊", ID=2 Scores= new List<int> {75, 84, 91, 39}},
new Student {Name="孙敏", ID=3, Scores= new List<int> {88, 94, 65, 85}},
new Student {Name="刘晓", ID=4, Scores= new List<int> {97, 89, 85, 82}},
new Student {Name="扬帆", ID=5, Scores= new List<int> {35, 72, 91, 70}}
};
return students;
}
static void Main()
{
List<Student> students = GetStudents();
//用true或false分组,查询变量是IEnumerable<IGrouping<bool, Student>>类型
var booleanGroupQuery = from student in students
group student by student.Scores.Average() >= 80;
foreach (var studentGroup in booleanGroupQuery)
{
Console.WriteLine(studentGroup.Key == true ? "平均分高于80" : "平均分低于80");
foreach (var student in studentGroup)
Console.WriteLine("{0,4} {1} {2}", student.ID, student.Name, student.Scores.Average());
}
}
输出:
平均分低于80
1 张勇 77.5
2 王磊 72.25
5 扬帆 67
平均分高于80
3 孙敏 83
4 刘晓 88.25
例2,查询人名先排序再分组,可以用姓作为分组关键字。
string[] Name = {"张明","刘新","王宏","刘洋","张媛","张宝","王金贵","刘东","王凯","刘芳"};
var sortedGroups = from name in Name
orderby name
group name by name[0] into newGroup
select newGroup;
foreach (var nameGroup in sortedGroups)
{
Console.WriteLine(nameGroup.Key);
foreach (var name in nameGroup)
Console.WriteLine(" "+name);
}
输出:
刘
刘东 刘芳 刘新 刘洋
王
王宏 王金贵 王凯
张
张宝 张明 张媛
输出结果按姓分类,组内排序。
《C#编程指南》(清华大学出版社2011年1月出版,可网购)第5章和第17章专门讨论LINQ查询更新数据库。
⑥ 求救!!!用C语言编一个课程表
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
intmain()
{
char*p[8][5],*a;
inti=0,j=0,n;
a=(char*)malloc(sizeof(char));
for(j=0;j<5;j++)
for(i=0;i<8;i++)
{
printf("周%d第%d节",j+1,i+1);
scanf("%s",a);
p[j][i]=a;
a=(char*)malloc(sizeof(char));
}
printf("周一 周二 周三 周四版权 周五 ");
for(j=0;j<5;j++){
for(i=0;i<8;i++)
{
printf("%s ",p[j][i]);
}
printf(" ");
}
}
⑦ 谁能给个C++的课程表
ITjob C++班 课程表
第一阶段 C语言(1-4周,共4周)
第二版阶段权 C++语言(5-7周,共3周)
第三阶段 Win32编程(8-8周,共1周)
第四阶段 MFC编程(9-11周,共3周)
第五阶段 Windows下的项目实战(12-12周,共1周)
第六阶段 Linux操作系统(13-13周,共1周)
第七阶段 Linux下的C/C++编程(14-16周,共3周)
第八阶段 Linux下的QT编程(17-17周,共1周)
第九阶段 Linux和Windows下的混合项目实战(18-19周,共2周)
第十阶段 就业指导,制作简历,模拟面试(20-20周,共1周)
⑧ 用C语言怎么编出来课程表
一、功能模块概要说明:
1.输入函数:
char* uscanf(int,int,int) //图形模式下输入函数,大小写26个字母0-9数字外加空格键为有效输入,可以使用BACKSPACE。
2.开始界面,退出界面和主界面:
void starting() //开始界面
void end() //结束界面
char* index() //主选择界面函数,返回选择信息(字符串);
3.数据输入、创建链表模块
char* tinkey(char*,int,int) //输入切换处理
char* recourse(char*,int,int) //课程输入
int wdetect(struct person*,char*) //课程输入检测,检测课表一星期同一天同一时间段内课程安排是否重复,如果重复给出修改提示信息
char* infuse(char*,char*,int) //课表输入
struct course *ccreat(char*) //创建课程单向链表
struct person* pcreat(char *) //创建个人课表节点
char *infcreat(char**,struct person**,struct person**,char*)
//创建课表双向链表
4.课表输出
char *print(char*) //课表输出背景界面
char *pkey() //课表输出按纽界面及处理
int table(int,int,struct person*) //在指定区域一表格形式输出一个人的课表
int forebox(struct person*) //初略显示下三个人的课表提示
5.文件存储和装载
char* save(char *,struct person *) //保存为磁盘文件,在图形模式下进行文件读写操作之后,程序出现莫名其妙的异常显示情形
6.课表查询:
struct person *pdemand(struct person *,char *) //按人名字查询其课表安排。
struct person* wddemand(struct person*,int) //按星期几查询课程安排情况。
struct person *cdemand(struct person *,char *) //按课程查询老师或学生课程安排情况。
char *demand(struct person *) // 查询切换,并显示查询结果,按名字查询一次只能一个。按星期几和课程查询可以查询到多个,如查询到多个接果,按任意键可依次输出。
7.排序。
struct course *csort(struct course *) //按课程编号排序课表节点中课程链表
struct person *psort(struct person *) //按人学号或老师编号排序课表链表
char sort(struct person*) //排序切换,并提示排序结果
8.插入。
char *insert(char *,struct person **,struct person **)
//擦入课表节点
9.删除。
char *delete(struct person **,char *)
//按人名删除其课表节点
二、操作说明:
1. Infuse:选定这个键后按Enter进入学生输入菜单,你可以输入学生的学号,姓名,学生在一学期内的所学课程的课程名,课程号,学时,以及在一周内上课的地址。如果当输入某课程上课地址有重复时,系统自动发出报警信息,并提示出错的地方,以便修改,
当选定couse时,表明此学生所学的该课程的信息输入完成再输入另外所学课程的信息,如上所写照样输入,
当选定finish时,并按回车键后,表明此学生在这一学期内所学的课程信息输入完成。如要继续输入学生的信息如前所述。
当选定back时,并按下回车键后,返回TIME TABLE主菜单,选择主菜单里的功能对所输入的信息进行处理。
当选定exit时,并按下回车键后,返回程序。结束程序。
2.SAVE/LOAD 选定此并按回车。此键作用对所输入的信息进行格式输出/载入。输入你要保存信息的文件名,文件格式系统自动生成。利用键盘上的方向键和TAB键进行控制。
3.DEMAND:按ENTER键开始输入,按反向键进行查询切换。当按星期几和课程查询时候,如遇到查询到多个结果,按任意键可依次输出直到完。
4.INSERT:按ENTER键开始输入,按反向键进行查询切换。输入同INFURE项。
5. DELETE: 按ENTER键显示输入框开始输入。其他同上。
6.SORT:当提示框中SORT变为红色时候,表示被选中,按ENTER键开始插入,如成功给出提示信息。
7.PRINT:依次输出链表,如果输出链表为空则不进仍输出页面。NEXT为下一个,PRO为上一个。下面FORENOTICE 框显示后三个节点。
8.EXIT:退出系统。效果同按ESC。
三、例程:
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
intmain()
{
char*p[8][5],*a;
inti=0,j=0,n;
a=(char*)malloc(sizeof(char));
for(j=0;j<5;j++)
for(i=0;i<8;i++)
{
printf("周%d第%d节",j+1,i+1);
scanf("%s",a);
p[j][i]=a;
a=(char*)malloc(sizeof(char));
}
printf("周一 周二 周三 周四 周五 ");
for(j=0;j<5;j++){
for(i=0;i<8;i++)
{
printf("%s ",p[j][i]);
}
printf(" ");
}
}
⑨ 希赛程序员在线培训课程表
课时1主讲:计算机基础
课时2主讲:操作系统
课时3主讲:多媒体技术
课时4主讲:计算机应用基础
课时5主讲:网络与信息安全
课时6主讲:法律法规与标准化
课时7主讲:数据库系统(一)
课时8主讲:数据库系统(二)
课时9主讲:软件工程
课时10主讲:程序设计语言
课时11主讲:数据结构
课时12主讲:C程序设计
课时13主讲:C++/Java
⑩ c语言怎样编写课程表,请问程序怎样写
链表存,
没学链表就数组+结构体完成。还没学结构体的话你就再啃啃C语言吧