高校教务管理系统源码

#include <stdio.h>

#include <string.h>

#include <windows.h>

struct student

{

long int num

char name[20]

int age

char sex[4]

char b[30]

char p[15]

}

int n=0

struct student stu[100]

struct student p

void lr()

void ll()

void cx()

void xg()

void sc()

void main()

{

int z

printf("+---------------------------+n")

printf("| 欢迎使用学生信息管理系统 |n")

printf("+---------------------------+n")

printf("提示：为保证您的操作得到保存，请按正常顺序退出系统^_^n")

do

{

printf("nttt--------------------------------n")

printf("ttt+主菜单|n")

printf("ttt--------------------------------n")

printf("ttt+[1]----录入学生信息 |n")

printf("ttt+[2]----浏览学生信息 |n")

printf("ttt+[3]----查询学生信息 |n")

printf("ttt+[4]----删除学生信息 |n")

printf("ttt+[5]----修改学生信息 |n")

printf("ttt+[0]----退出系统 |n")

printf("ttt--------------------------------n")

printf("请输入您的选择：")

scanf("%d", &z)

system("color 2f")

switch(z)

{

case 0 :break

case 1 :lr()break

case 2 :ll()break

case 3 :cx()break

case 4 :sc()break

case 5 :xg()break

default:printf("n无效选项!")

}

}

while(z!= 0)

}

void lr()

{

int y

if(n==0)

p=stu

do

{

printf("--------------------n")

printf("请输入学生的学号:")

scanf("%ld",&p->num)

printf("请输入学生的姓名:")

scanf("%s",p->name)

printf("请输入学生的年龄:")

scanf("%d",&p->age)

printf("请输入学生的性别:")

scanf("%s",p->sex)

printf("请输入学生的地址:")

scanf("%s",p->b)

printf("请输入学生的电话:")

scanf("%s",p->p)

n++

p++

printf("n1.继续输入.n0.输入完毕.n")

printf("请选择：")

scanf("%d",&y)

}

while(y==1)

printf("提示：输入完毕!你一共输入%d个n",n)

}

void ll()

{

int i,j

if(n!=0)

{ printf("学生总数:%dn", n)

printf("学号t姓名t年龄t性别t地址tt电话n")

printf("-----------------------------------------------------n")

for(i=0i<ni++)

printf("%ldt%st%dt%st%stt%sn",stu[i].num,stu[i].name,stu[i].age,stu[i].sex,stu[i].b,stu[i].p)

}

else printf("提示:无学生数据，请输入数据！")

}

void cx()

{

int c

int w,i,j=0

char name[20]

if(n!=0)

{

do{printf("n")

printf("+--------------------+n")

printf("| 按学号查询 请按 1 |n")

printf("| 按姓名查询 请按 2 |n")

printf("| 取消请按 0 |n")

printf("+--------------------+n")

printf("请输入您的选择：")

scanf("%d", &c)

switch(c)

{

case 0:break

case 1:

printf("请输入学生的学号")

scanf("%ld", &w)

printf("n")

for(i=0i<ni++)

if(stu[i].num==w)

{

printf("n学号t姓名t年龄t性别t地址tt电话n")

printf("%ldt%st%dt%st%stt%sn",stu[i].num,stu[i].name,stu[i].age,stu[i].sex,stu[i].b,stu[i].p)

j=1

}

if(j==0)

printf("提示:没有该学生记录，请核对！")

break

case 2:

printf("请输入学生的姓名：")

scanf("%s", name)

printf("n")

for(i=0i<ni++)

if(strcmp(name,stu[i].name)==0)

{

printf("n学号t姓名t年龄t性别t地址tt电话n")

j=1

printf("%ldt%st%dt%st%stt%sn",stu[i].num,stu[i].name,stu[i].age,stu[i].sex,stu[i].b,stu[i].p)

}

if(j==0)

printf("提示:没有该学生记录，请核对！")

break

default:

printf("n提示:无效选项!")

break

}

}while(c!= 0)

}else printf("提示:无学生数据，请输入数据！")

return

}

void xg()

{

long int num

int i,j,c

if(n!=0)

{

printf("请输入您要修改的学生的学号：")

scanf("%ld", &num)

printf("n")

for(i=0i<ni++)

if(stu[i].num==num)

j=i

do{

printf("请选择您要修改的学生的信息内容：n")

printf("+----------------------+n")

printf("| 姓名 请按 1 |n")

printf("| 年龄 请按 2 |n")

printf("| 性别 请按 3 |n")

printf("| 学号 请按 4 |n")

printf("| 地址 请按 5 |n")

printf("| 电话 请按 6 |n")

printf("| 取消 请按 0 |n")

printf("+----------------------+n")

printf("请输入您的选择：")

scanf("%d", &c)

printf("n")

switch(c)

{

case 0:break

case 1:printf("请输入新姓名：")

scanf("%s",stu[j].name)

break

case 2:printf("请输入新年龄：")

scanf("%d",&stu[j].age)

break

case 3:printf("请输入新性别：")

scanf("%s",stu[j].sex)

break

case 4:printf("请输入新学号：")

scanf("%ld",&stu[j].num)

break

case 5:printf("请输入新地址：")

scanf("%s",stu[j].b)

break

case 6:printf("请输入新电话：")

scanf("%s",stu[j].p)

break

default:

printf("n无效选项!")

break

}

}while(c!= 0)

}else printf("提示:无学生数据，请输入数据！")

}

void sc()

{

long int num

int i,j,e

if(n!=0)

{

printf("学号t姓名t年龄t性别t地址tt电话n")

printf("-----------------------------------------------------n")

for(i=0i<ni++)

printf("%ldt%st%dt%st%stt%sn",stu[i].num,stu[i].name,stu[i].age,stu[i].sex,stu[i].b,stu[i].p)

printf("请输入您要删除的学生的学号：")

scanf("%ld", &num)

printf("n")

for(i=0i<ni++)

if(num==stu[i].num)

j=i

if(j!=(n-1))

{

for(e=i-1e<ne++,j++)

{

stu[j].num=stu[j+1].num

strcpy(stu[j].name,stu[j+1].name)

strcpy(stu[j].sex,stu[j+1].sex)

stu[j].age=stu[j+1].age

strcpy(stu[j].b,stu[j+1].b)

strcpy(stu[j].p,stu[j+1].p)

n--p--

}

}else {n--p--}

printf("提示:删除完毕！")

}elseprintf("提示:无学生数据，请输入数据！")

}

教务管理系统源码下载在哪了

这是我用来交作业的程序.虽然不是自己写的.传上来再说了.

等我自己的可以用了.再传...

package jettang

import java.lang.

import java.awt.

import java.awt.event.

import javax.swing.

import java.sql.

//////////////////////////////////////////////

//主类

public class STU {

public STU() {

try {

jbInit()

} catch (Exception ex) {

ex.printStackTrace()

}

}

public static void main(String args[]) {

new Frm_Main()

}

private void jbInit() throws Exception {

}

}

//主框架，数据库

class Frm_Main implements ActionListener { //throws IOException

public static final int EXIT_ON_CLOSE = 0

public Jframe frame

public Container c

public JMenuBar menuBar

public JMenu mainMenu1

public JMenu mainMenu2

public JMenu mainMenu3

public JMenuItem subMenu1[] = new JMenuItem[5]

public JMenuItem subMenu2[] = new JMenuItem[7]

public JMenuItem subMenu3[] = new JMenuItem[2]

JButton toolBarButton[] = new JButton[8]

public JToolBar toolBar

//////////////////////////////////////////////

String strTip[] = {"姓名查询...", "添加信息...",

"删除...", "修改...", "修改确认...",

"添加确认...", "删除确认...", "关于产品信息:)"}

//////////////////////////////////////////////

// String id = new String()

String name = new String()

String sex = new String()

String age = new String()

String classid = new String()

String department = new String()

String call = new String()

//////////////////////////////////////////////

Connection con

ResultSet rs

Statement st

// ResultSetmetaData rsmd

// Vector columnHeads=new Vector()

// Vector rows = new Vector()

// Vector currentRow=new Vector()

///////////////////////////////////////////////

public JLabel classidL = new JLabel("班级")

public JLabel nameL = new JLabel("姓名")

public JLabel sexL = new JLabel("性别")

public JLabel ageL = new JLabel("年龄")

public JLabel departmentL = new JLabel("单位")

public JLabel callL = new JLabel("电话")

public JLabel tittleLabel = new JLabel()

//////////////////////////////////////////////

public JTextField classidT = new JTextField()

public JTextField nameT = new JTextField()

public JTextField sexT = new JTextField()

public JTextField ageT = new JTextField()

public JTextField departmentT = new JTextField()

public JTextField callT = new JTextField()

public Jtextarea textT = new Jtextarea()

//////////////////////////////////////////////

//////////////////////////////////////////////

public Frm_Main() {

/////////////////////////////////////////////////

frame = new Jframe("学籍管理系统V1.0")

c = frame.getContentPane()

c.setLayout(null)

menuBar = new JMenuBar()

toolBar = new JToolBar()

toolBar.setFloatable(false)

frame.setJMenuBar(menuBar)

frame.setResizable(false)

////////////////////////////////////////////////

mainMenu1 = new JMenu("管理")

String str1[] = {"添加", "删除", "查询", " ", "关闭"}

for (int i = 0i <5i++) {

if (i == 3) {

mainMenu1.addSeparator()

} else {

subMenu1[i] = new JMenuItem(str1[i])

subMenu1[i].addActionListener(this)

mainMenu1.add(subMenu1[i])

}

}

menuBar.add(mainMenu1)

/////////////////////////////////////////////////

mainMenu2 = new JMenu("操作")

String str2[] = {"查询", "添加", "删除", "修改",

"提交修改", "提交添加", "提交删除"}

for (int i = 0i <7i++) {

subMenu2[i] = new JMenuItem(str2[i])

subMenu2[i].addActionListener(this)

mainMenu2.add(subMenu2[i])

}

menuBar.add(mainMenu2)

/////////////////////////////////////////////////

mainMenu3 = new JMenu("集体查询")

String str3[] = {"按班级...", "按单位..."}

for (int i = 0i <2i++) {

subMenu3[i] = new JMenuItem(str3[i])

subMenu3[i].addActionListener(this)

mainMenu3.add(subMenu3[i])

}

menuBar.add(mainMenu3)

////////////////////////////////////////////////

String strToolBar[] = {"查询", "添加", "删除", "修改", "提交修改",

"提交添加", "提交删除", "关于"}

for (int i = 0i <8i++) {

toolBarButton[i] = new JButton(strToolBar[i])

toolBarButton[i].setToolTipText(strTip[i])

toolBarButton[i].addActionListener(this)

toolBar.add(toolBarButton[i])

}

toolBar.setLocation(0, 0)

toolBar.setSize(400, 30)

c.add(toolBar)

////////////////////////////////////////////////

classidL.setLocation(35, 40)

classidL.setSize(40, 20)

//classidL.setFont(new Font("",Font.BOLD,12))

c.add(classidL)

classidT.setLocation(90, 40)

classidT.setSize(200, 20)

//classidT.setEnabled(false)

c.add(classidT)

nameL.setLocation(35, 70)

nameL.setSize(40, 20)

c.add(nameL)

nameT.setLocation(90, 70)

nameT.setSize(200, 20)

c.add(nameT)

sexL.setLocation(35, 100)

sexL.setSize(40, 20)

c.add(sexL)

sexT.setLocation(90, 100)

sexT.setSize(200, 20)

c.add(sexT)

ageL.setLocation(35, 130)

ageL.setSize(40, 20)

c.add(ageL)

ageT.setLocation(90, 130)

ageT.setSize(200, 20)

c.add(ageT)

departmentL.setLocation(35, 160)

departmentL.setSize(40, 20)

c.add(departmentL)

departmentT.setLocation(90, 160)

departmentT.setSize(200, 20)

c.add(departmentT)

callL.setLocation(35, 190)

callL.setSize(40, 20)

c.add(callL)

callT.setLocation(90, 190)

callT.setSize(200, 20)

c.add(callT)

/////////////////////////////////////////////////

tittleLabel.setText("----------集体查询结果--------")

tittleLabel.setSize(300, 20)

tittleLabel.setLocation(10, 210)

c.add(tittleLabel)

////////////////////////////////////////////

textT.setSize(400, 300)

textT.setLocation(10, 240)

c.add(textT, 14)

///////////////////////////////////////////////

frame.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE)

frame.setSize(500, 650)

frame.setLocation(200, 200)

frame.setVisible(true)

conDB()

}

//以上是框架设计

//JDBC

public void conDB() {

try {

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver")

} catch (ClassNotFoundException e) {

JOptionPane.showMessageDialog(null, "数据库错误")

}

try {

con = DriverManager.getConnection("jdbc:odbc:jettang", "sa", "")

st = con.createStatement()

} catch (SQLException e) {

JOptionPane.showMessageDialog(null, "数据库连接失败")

}

}

//关闭连接

public void closeDB() {

try {

st.close()

con.close()

} catch (SQLException e) {

JOptionPane.showMessageDialog(null, "数据库关闭失败")

}

}

//事件响应

public void actionPerformed(ActionEvent e) {

//////////////////////////////////////////////

if (e.getSource() == toolBarButton[7]) {

JOptionPane.showMessageDialog(null, "当前版本1.0，designed by qyq &wxm")

}

/////////////////////////////////////////////查询(按姓名)

if (e.getSource() == subMenu2[0] || e.getSource() == toolBarButton[0] ||

e.getSource() == subMenu1[2]) {

String idid = JOptionPane.showInputDialog("请输入学生姓名")

if (idid.trim() != "") {

String strSQL = "select from stuinfo where name ='" + idid +

"'"

try {

rs = st.executeQuery(strSQL)

int count = 0

while (rs.next()) {

classid = rs.getString("classid")

name = rs.getString("name")

department = rs.getString("department")

sex = rs.getString("sex")

age = rs.getString("age")

call = rs.getString("call")

++count

}

if (count == 0) {

JOptionPane.showMessageDialog(null, "无此信息")

} else {

classidT.setText(classid)

nameT.setText(name)

sexT.setText(sex)

ageT.setText(age)

callT.setText(call)

departmentT.setText(department)

}

} catch (Exception ex) {

JOptionPane.showMessageDialog(null, "查询失败")

}

}

}

/////////////////////////////////////////////关闭

if (e.getSource() == subMenu1[4]) {

frame.dispose()

closeDB()

}

/////////////////////////////////////////////添加

if (e.getSource() == subMenu1[0] || e.getSource() == subMenu2[1] ||

e.getSource() == toolBarButton[1]) {

JOptionPane.showMessageDialog(null, "请输入你添加的信息再点击提交添加键")

classidT.setEnabled(true)

classidT.setText("")

nameT.setText("")

sexT.setText("")

ageT.setText("")

callT.setText("")

departmentT.setText("")

}

/////////////////////////////////////////////提交添加

if (e.getSource() == toolBarButton[5] || e.getSource() == subMenu2[5]) {

if ((classidT.getText().trim()).equals("") ||

(nameT.getText().trim()).equals("") ||

(sexT.getText().trim()).equals("") ||

(ageT.getText().trim()).equals("") ||

(callT.getText().trim()).equals("") ||

(departmentT.getText().trim()).equals("")) {

JOptionPane.showMessageDialog(null, "请先点击添加键")

} else {

classid = classidT.getText()

name = nameT.getText()

sex = sexT.getText()

age = ageT.getText()

call = callT.getText()

department = departmentT.getText()

String strSQL =

"insert into stuinfo(classid,name,sex,age,call,department) values('" +

classid + "','" +

name + "','" + sex + "','" + age + "','" + call + "','" +

department + "')"

try {

st.executeUpdate(strSQL)

} catch (Exception exx) {

JOptionPane.showMessageDialog(null, "添加失败")

return

}

JOptionPane.showMessageDialog(null, "添加成功")

classidT.setText("")

nameT.setText("")

sexT.setText("")

ageT.setText("")

callT.setText("")

departmentT.setText("")

}

}

////////////////////////////////////////////提交修改

if (e.getSource() == subMenu2[4] || e.getSource() == toolBarButton[4]) {

if ((classidT.getText().trim()).equals("") ||

(nameT.getText().trim()).equals("") ||

(sexT.getText().trim()).equals("")

|| (ageT.getText().trim()).equals("") ||

(callT.getText().trim()).equals("") ||

(departmentT.getText().trim()).equals("")) {

JOptionPane.showMessageDialog(null, "请先点击修改键")

return

} else {

classid = classidT.getText()

name = nameT.getText()

sex = sexT.getText()

age = ageT.getText()

call = callT.getText()

department = departmentT.getText()

String strSQL = "update stuinfo set classid='" + classid +

"',sex='" + sex + "',age='" + age + "',call='" +

call + "',department='" + department + "'" +

"where name='" + name + "'"

try {

st.executeUpdate(strSQL)

} catch (Exception exx) {

JOptionPane.showMessageDialog(null, "修改失败")

return

}

JOptionPane.showMessageDialog(null, "修改成功")

classidT.setText("")

nameT.setText("")

sexT.setText("")

ageT.setText("")

callT.setText("")

departmentT.setText("")

}

}

///////////////////////////////////////////////修改

if (e.getSource() == subMenu2[3] || e.getSource() == toolBarButton[3]) {

String idid = JOptionPane.showInputDialog

("请输入你要修改的学生姓名后点击提交修改键确认")

if (idid.trim() != "") {

String strSQL = "select from stuinfo where name ='" + idid +

"'"

try {

rs = st.executeQuery(strSQL)

int count = 0

while (rs.next()) {

classid = rs.getString("classid")

name = rs.getString("name")

department = rs.getString("department")

sex = rs.getString("sex")

age = rs.getString("age")

call = rs.getString("call")

++count

}

if (count == 0) {

JOptionPane.showMessageDialog(null, "无此信息")

} else {

classidT.setText(classid)

nameT.setText(name)

sexT.setText(sex)

ageT.setText(age)

callT.setText(call)

departmentT.setText(department)

classidT.setEnabled(false)

}

} catch (Exception ex) {

JOptionPane.showMessageDialog(null, "修改失败")

}

}

}

/////////////////////////////////////////////////删除

if (e.getSource() == subMenu2[2] || e.getSource() == toolBarButton[2] ||

e.getSource() == subMenu1[1]) {

String idDel = JOptionPane.showInputDialog

("请输入要删除的学生姓名后点击提交删除键确认")

if (idDel.trim() != "") {

String strSQL = "select from stuinfo where name ='" + idDel +

"'"

try {

rs = st.executeQuery(strSQL)

int count = 0

while (rs.next()) {

classid = rs.getString("classid")

name = rs.getString("name")

department = rs.getString("department")

sex = rs.getString("sex")

age = rs.getString("age")

call = rs.getString("call")

++count

}

if (count == 0) {

JOptionPane.showMessageDialog(null, "无此信息")

} else {

classidT.setText(classid)

nameT.setText(name)

sexT.setText(sex)

ageT.setText(age)

callT.setText(call)

departmentT.setText(department)

classidT.setEnabled(false)

}

} catch (Exception ex) {

JOptionPane.showMessageDialog(null, "删除失败")

}

}

}

//////////////////////////////////////////////////提交删除

if (e.getSource() == toolBarButton[6] ||

e.getSource() == subMenu2[6]) {

if ((classidT.getText().trim()).equals("") ||

(nameT.getText().trim()).equals("") ||

(sexT.getText().trim()).equals("") ||

(ageT.getText().trim()).equals("") ||

(callT.getText().trim()).equals("") ||

(departmentT.getText().trim()).equals("")) {

JOptionPane.showMessageDialog(null, "请先点击删除键")

return

} else {

name = nameT.getText()

String strSQL = "delete from stuinfo where name='" + name +

"'"

try {

st.executeUpdate(strSQL)

} catch (Exception exx) {

JOptionPane.showMessageDialog(null, "删除失败")

return

}

JOptionPane.showMessageDialog(null, "删除成功")

classidT.setText("")

nameT.setText("")

sexT.setText("")

ageT.setText("")

callT.setText("")

departmentT.setText("")

}

}

//////////////////////////////////////////////集体查询（按班级）

if (e.getSource() == subMenu3[0]) {

classidT.setText("")

nameT.setText("")

sexT.setText("")

ageT.setText("")

callT.setText("")

departmentT.setText("")

if ((classidT.getText().trim()).equals("")) {

String idclass = JOptionPane.showInputDialog("请输入班级")

String strSQL = "select from stuinfo where classid='" +

idclass +

"'"

try {

rs = st.executeQuery(strSQL)

displayres(rs)

} catch (Exception ex) {

JOptionPane.showMessageDialog(null, "查询失败")

}

} else {

String idclass = classidT.getText()

String strSQL = "select from stuinfo where classid='" +

idclass +

"'"

try {

rs = st.executeQuery(strSQL)

displayres(rs)

} catch (Exception ex) {

JOptionPane.showMessageDialog(null, "查询失败")

}

}

}

////////////////////////////按单位

if (e.getSource() == subMenu3[1]) {

classidT.setText("")

nameT.setText("")

sexT.setText("")

ageT.setText("")

callT.setText("")

departmentT.setText("")

if ((departmentT.getText().trim()).equals("")) {

String idclass = JOptionPane.showInputDialog("请输入单位")

String strSQL = "select from stuinfo where department='" +

idclass +

"'"

try {

rs = st.executeQuery(strSQL)

displayres(rs)

} catch (Exception ex) {

JOptionPane.showMessageDialog(null, "查询失败")

}

} else {

String idclass = departmentT.getText()

String strSQL = "select from stuinfo where department='" +

idclass +

"'"

try {

rs = st.executeQuery(strSQL)

displayres(rs)

} catch (Exception ex) {

JOptionPane.showMessageDialog(null, "查询失败")

}

}

}

}

public void displayres(ResultSet rs1) throws SQLException {

//定位到达第一条记录

boolean moreRecords = rs1.next()

//如果没有记录，则提示一条消息

if (!moreRecords) {

JOptionPane.showMessageDialog(null, "无此记录")

return

}

try {

//获取数据

getNextRow(rs1)

//刷新Table

c.validate()

}

catch (SQLException sqlex) {

sqlex.printStackTrace()

}

}

public void getNextRow(ResultSet rs2) throws

SQLException {

int count = 1

while (rs2.next()) {

name = " 姓名：" + rs2.getString(1)

age = " 年龄：" + rs2.getString(2) + " 单位："

department = rs2.getString(3) + "n"

textT.append(count + "." + name + age + department)

count++

}

}

}

教务信息管理系统（C语言）

这就是普通的网站后台，或ERP系统就可以实现，现在网上这方面水平比较高的就是李天生老师了，你要以去“xin3721视频教程网”，那里有很多他的视频教程，当然也有ASP+Access方面的内容。

#include <stdio.h>

struct Student

{

int num

char name[20]

float score[3]

float avg

}stus[30]

void Add()//填加学员

void List()//学员详细列表

void Asc()//显示后三名学员

void Desc()//显示前三名学员

void Display()

void main()

{

int s

while(1)

{

printf("学员管理系统：n")

printf("1、增加学员n")

printf("2、学员详细列表n")

printf("3、显示前三名n")

printf("4、显示后三名n")

printf("5、显示平均成绩n")

printf("6、退出n")

printf("请选择：")

scanf("%d",&s)

switch(s)

{

case 1:

Add()

break

case 2:

List()

break

case 3:

Desc()

Display()

break

case 4:

Asc()

Display()

break

case 5:

Display()

break

case 6:

return

break

default:

printf("选择错误!n")

break

}

}

}

void Add()

{

int i,k

float sum

char c

for(i=0i<30i++)

{

printf("请输入第%d个学员信息：n",i+1)

printf("学号：")

scanf("%d",&stus[i].num)

printf("姓名：")

fflush(stdin)

scanf("%s",stus[i].name)

printf("请输入三门课的成绩：n")

sum=0

for(k=0k<3k++)

{

printf("%d:",k+1)

scanf("%f",&stus[i].score[k])

sum+=stus[i].score[k]

}

stus[i].avg=sum/3

printf("是否继续？")

fflush(stdin)

scanf("%c",&c)

if(c=='n' || c=='N')

return

}

}

void List()

{

int i,j=0

printf("学号t姓名t成绩1t成绩2t成绩3t平均n")

for(i=0i<30i++)

{

if(stus[i].num!=0)

{

printf("%dt%st%.2ft%.2ft%.2ft%.2fn",stus[i].num,stus[i].name,stus[i].score[0],stus[i].score[1],stus[i].score[2],stus[i].avg)

}

}

}

void Asc()

{

int i,j

struct Student c

for(i=0i<30i++)

{ for(j=0j<29-ij++)

if(stus[j].avg<stus[j+1].avg)

{

c=stus[j]

stus[j]=stus[j+1]

stus[j+1]=c

}

}

}

void Desc()

{

int i,j

struct Student c

for(i=0i<30i++)

{ for(j=0j<29-ij++)

if(stus[j].avg>stus[j+1].avg)

{

c=stus[j]

stus[j]=stus[j+1]

stus[j+1]=c

}

}

}

void Display()

{

int i,d=0

printf("学号t姓名t平均n")

for(i=0i<30i++)

{

if(stus[i].num!=0)

{

printf("%dt%st%.2fn",stus[i].num,stus[i].name,stus[i].avg)

d++

}

if(d==3)

break

}

}

看看我写的这个！