制作学生信息（姓名，学号，成绩）管理系统(用Java)

Posted 2023-04-13

制作学生信息（姓名，学号，成绩）管理系统
功能包括：
1 输入学生信息（姓名，学号，成绩）
2 列出学生信息，依次列出各学生 姓名，学号，成绩
3 按学号检索学生信息，输出：姓名，成绩
4 学生信息按学生成绩进行低到高排序输出
5 存储学生信息，将各学生姓名，学号，成绩按二进制方式存入文件
6 读出学生信息，从文件中读出学生信息，放入数组
7 读到end字符串，程序结束
参考结构如下：

其中，StudentData以数组存储学生信息（num成员变量表示数组有效个数，MAXSIZE为最大记录数）MainClass中使用死循环读入指令操作
谢谢

import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Container;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JToolBar;
import javax.swing.SwingConstants;
public class MainFrame extends JFrame implements ActionListener
InsertPanel ip = null;
SelectPanel sp = null;
JPanel pframe;
JButton jb1,jb2,jb3;
JMenuItem jm11,jm21,jm22,jm23,jm31,jm32,jm41,jm42;
CardLayout clayout;
public MainFrame(String s)
super(s);
JMenuBar mb = new JMenuBar();
this.setJMenuBar(mb);
JMenu m1 = new JMenu("系统");
JMenu m2 = new JMenu("基本信息");
JMenu m3 = new JMenu("成绩");
JMenu m4 = new JMenu("奖惩");
mb.add(m1);
mb.add(m2);
mb.add(m3);
mb.add(m4);
jm11 = new JMenuItem("退出系统");
jm21 = new JMenuItem("输入");
jm22 = new JMenuItem("查询");
jm23 = new JMenuItem("更改");
jm31 = new JMenuItem("输入成绩");
jm32 = new JMenuItem("查询成绩");
jm41 = new JMenuItem("奖励");
jm42 = new JMenuItem("处分");
m1.add(jm11);
m2.add(jm21);
m2.add(jm22);
m2.add(jm23);
m3.add(jm31);
m3.add(jm32);
m4.add(jm41);
m4.add(jm42);
Icon i1 = new ImageIcon();
Icon i2 = new ImageIcon();
Icon i3 = new ImageIcon();
jb1 = new JButton(i1);
jb1.setToolTipText("输入");
jb2 = new JButton(i2);
jb2.setToolTipText("查询");
jb3 = new JButton(i3);
jb3.setToolTipText("退出");
JToolBar tb = new JToolBar("系统工具");
tb.add(jb1);
tb.add(jb2);
tb.add(jb3);
add(tb,BorderLayout.NORTH);
jm11.addActionListener(this);
jm21.addActionListener(this);
jm22.addActionListener(this);
jb1.addActionListener(this);
jb2.addActionListener(this);
jb3.addActionListener(this);
clayout = new CardLayout();
pframe = new JPanel(clayout);
add(pframe);
JPanel mainp = new JPanel(new BorderLayout());
JLabel mainl = new JLabel("学生信息管理平台",SwingConstants.CENTER);
mainl.setFont(new Font("serif",Font.BOLD,30));
mainp.add(mainl);
pframe.add(mainp,"main");
clayout.show(pframe, "main");

public void actionPerformed(ActionEvent e)
if(e.getSource() == jm21 || e.getSource() == jb1)
if(ip == null)
ip= new InsertPanel();
pframe.add(ip,"insert");

clayout.show(pframe, "insert");
this.setTitle("输入学生信息");

else if(e.getSource() == jm22 || e.getSource() == jb2)
if(sp == null)
sp= new SelectPanel();
pframe.add(sp,"select");

clayout.show(pframe, "select");
this.setTitle("查询学生信息");

else if(e.getSource() == jm11 || e.getSource() == jb3)
System.exit(0);



第二个：
import javax.swing.JFrame;
public class MainTest
public static void main(String [] args)
MainFrame f = new MainFrame("学生信息管理平台");
f.setSize(400,300);
f.setLocation(350,250);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);


第二个：
import java.sql.Connection;
import java.sql.DriverManager;
public class mysqlConnection
static Connection getCon()
Connection con = null;
try
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost/test","root","123");

catch(Exception e)
System.out.println("建立数据库连接遇到异常！");

return con;


第四个：
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
public class SelectPanel extends JPanel implements ActionListener
JButton jb;
JTextField jt;
JTextField jt1,jt2,jt3,jt4;
public SelectPanel()
JLabel jl = new JLabel("请输入学号:",SwingConstants.CENTER);
jt = new JTextField();
jb = new JButton("确定");
JPanel jp1 = new JPanel(new GridLayout(1,3));
jp1.add(jl);
jp1.add(jt);
jp1.add(jb);
JLabel j1,j2,j3,j4;
j1 = new JLabel("学号:",SwingConstants.CENTER);
j2 = new JLabel("姓名:",SwingConstants.CENTER);
j3 = new JLabel("性别:",SwingConstants.CENTER);
j4 = new JLabel("年龄:",SwingConstants.CENTER);
jt1 = new JTextField(6);
jt1.setEditable(false);
jt2 = new JTextField(6);
jt2.setEditable(false);
jt3 = new JTextField(6);
jt3.setEditable(false);
jt4 = new JTextField(6);
jt4.setEditable(false);
JPanel jp2 = new JPanel(new BorderLayout());
JPanel jp3 = new JPanel(new GridLayout(4,2));
jp2.add(new JLabel(""),BorderLayout.NORTH);
jp3.add(j1);
jp3.add(jt1);
jp3.add(j2);
jp3.add(jt2);
jp3.add(j3);
jp3.add(jt3);
jp3.add(j4);
jp3.add(jt4);
jp2.add(jp3);
this.setLayout(new BorderLayout());
add(jp1,BorderLayout.NORTH);
add(jp2);
jb.addActionListener(this);

public void actionPerformed(ActionEvent e)
if(e.getSource() == jb)
String stuNo = jt.getText().trim();
Student s = new Student();
boolean b = true;
try
b = s.selectByStuNo(stuNo);

catch(Exception ex)
System.out.println("查询学生信息遇到异常!");

if(b)
jt1.setText(s.getStuNo());
jt2.setText(s.getName());
jt3.setText(s.getGender());
int a = s.getAge();
Integer i = new Integer(a);
jt4.setText(i.toString());

else
JOptionPane.showMessageDialog(null, "无此学生!");





第五个：
import javax.swing.JFrame;
public class SelectTest
public static void main(String [] args)
JFrame f = new JFrame("查询学生信息");
SelectPanel p = new SelectPanel();
f.add(p);
f.setSize(400,300);
f.setLocation(300,250);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);


第六个：
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
public class Student
String stuNo;
String name;
String gender;
int age;
public Student()
public Student(String stuNo,String name,String gender, int age)
this.stuNo = stuNo;
this.name = name;
this.gender = gender;
this.age = age;

public String getStuNo()
return stuNo;

public void setStuNo(String stuNo)
this.stuNo = stuNo;

public String getName()
return name;

public void setName(String name)
this.name = name;

public String getGender()
return gender;

public void setGender(String gender)
this.gender = gender;

public int getAge()
return age;

public void setAge(int age)
this.age = age;

public boolean insertStudent()
boolean b = true;
try
Connection con = MySQLConnection.getCon();
Statement statement = con.createStatement();
String sql = "insert into student values('" + stuNo + "','" + name +"','" + gender + "'," + age + ")";
sql = new String(sql.getBytes("gb2312"),"ISO8859_1");
statement.executeUpdate(sql);
con.close();

catch(Exception e)
b = false;
System.out.println("插入数据库遇到异常！");

return b;

public boolean selectByStuNo(String stuNo)throws Exception
boolean b = true;
Connection con = MySQLConnection.getCon();
Statement statement = con.createStatement();
String sql = "select * from student where stuNo =" + stuNo;
ResultSet rs = statement.executeQuery(sql);
if(rs != null && rs.next())
String no = rs.getString(1);
this.setStuNo(no);
String n = rs.getString(2);
n = new String(n.getBytes("ISO8859_1"),"gb2312");
this.setName(n);
String g = rs.getString(3);
g = new String (g.getBytes("ISO8859_1"),"gb2312");
this.setGender(g);
this.setAge(rs.getInt(4));
b = true;

rs.close();
statement.close();
con.close();
return b;

参考技术A 都不对本回答被提问者采纳

用c语言链表编写一个学生信息系统程序，要求输出学生的学号，姓名，性别，还有三门课比如语，数，外的成绩

要简单一点的，才学c语言，链表不懂，复杂的可能看不懂，谢谢各位大神了，很急！在线等啊！！！！！！
怎么没人啊！很急，实在是不会，网上也搜了好多可大多不能运行，不懂更不知道怎么改，来个大哥大姐编一下啊！！！！

参考技术A /*
用c语言链表编写一个学生信息系统程序，要求输出学生的学号，姓名，性别，还有三门课比如语，数，外的成绩
*/
//FileName: stuinfo.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define SERIALLEN 20
#define COURSENUM 3

typedef struct

char course[SERIALLEN];
float score;
_courseInfo;

typedef struct _stuinfo

char serial[SERIALLEN];
char name[SERIALLEN];
char sex[SERIALLEN];
_courseInfo courseInfo[COURSENUM];
struct _stuinfo *next;
stuinfo;

int main(int argc, char **argv)

stuinfo *head=NULL,*ptr=NULL,*s=NULL;
char str[SERIALLEN];
int cycle=1;
int i=0;
memset(str,0,SERIALLEN);
printf("建立学生信息：\n");
head=(stuinfo *)calloc(1,sizeof(stuinfo));
if(!head)

perror("申请空间失败，没有足够内存。");
return -1;

ptr=head;
while(cycle)

puts("输入学生学号(0退出):");
scanf("%s",str);
if(strcmp(str,"0")) //如果学号为0，则退出链表的创建

s=(stuinfo *)calloc(1,sizeof(stuinfo));
if(!ptr)

perror("申请空间失败，没有足够内存。");
return -1;

memset(s->serial,0,SERIALLEN);
strcpy(s->serial,str);
memset(s->name,0,SERIALLEN);
puts("输入姓名:");
scanf("%s",s->name);
memset(s->sex,0,SERIALLEN);
puts("输入性别:");
scanf("%s",s->sex);
for(i=0;i<COURSENUM;i++)

memset(s->courseInfo[i].course,0,SERIALLEN);
puts("输入课程名称:");
scanf("%s",s->courseInfo[i].course);
s->courseInfo[i].score=0.0f;
puts("输入课程分数:");
scanf("%f",&(s->courseInfo[i].score));


ptr->next=s;
ptr=s;

else cycle=0;


ptr->next=NULL;
ptr=head;
head=head->next;
free(ptr);
//head=linkSort(head);
ptr=head;
printf("学号\t姓名\t性别");
for(i=0;i<COURSENUM;i++)
printf("\t课程[%d]",i);
printf("\n");
while(ptr!=NULL)

printf("%s\t%s\t%s",ptr->serial,ptr->name,ptr->sex);
for(i=0;i<COURSENUM;i++)
printf("\t%s[%.2f]",ptr->courseInfo[i].course,ptr->courseInfo[i].score);
printf("\n");
ptr=ptr->next;

return 0;


C:\mypro>gcc -g -Wall student.c -o student

C:\mypro>student
建立学生信息：
输入学生学号(0退出):
007
输入姓名:
zxsh
输入性别:
male
输入课程名称:
chinese
输入课程分数:
99
输入课程名称:
phy
输入课程分数:
100
输入课程名称:
english
输入课程分数:
98
输入学生学号(0退出):
002
输入姓名:
pipal
输入性别:
female
输入课程名称:
chem
输入课程分数:
98
输入课程名称:
math
输入课程分数:
97
输入课程名称:
chinese
输入课程分数:
100
输入学生学号(0退出):
0
学号 姓名 性别 课程[0] 课程[1] 课程[2]
007 zxsh male chinese[99.00] phy[100.00] english[98.00]
002 pipal female chem[98.00] math[97.00] chinese[100.00]

C:\mypro>本回答被提问者和网友采纳 参考技术B 简单数组实现

student.h
//---------------------
#ifndef STUDENT_H_
#define STUDENT_H_
#include <stdio.h>
#define MAX 20
#define SIZE 5

struct student

char name[MAX];
int age;
float chinese;
float math;
float average;
;

typedef struct student STD;

void get_data(STD *ps);
void print_info(STD *ps);
void get_avg(STD *ps);
void s_sort(STD *ps);

#endif
//-----------------------------
student.c
//----------------------
#include <stdio.h>
#include "student.h"

static float sum(STD *ps);

void get_data(STD *ps)

int i;
puts("-------------------------请输入学生信息");
puts("姓名 年龄 语文 数学"); //各成员空格间隔
for(i=0; i<SIZE; i++)

scanf("%s%d%f%f", (ps+i)->name, &((ps+i)->age), &((ps+i)->chinese), &((ps+i)->math));
get_avg(ps+i);
while (getchar() != '\n')
continue;

puts("");
return ;


void print_info(STD *ps)

int i;
puts("--------------------- 学生的成绩列表:");
puts("姓名 年龄 语文 数学 总分 平均分");
for (i=0; i<SIZE; i++)

printf("%s %d %.1f %.1f %.1f %.1f \n", (ps+i)->name, (ps+i)->age, (ps+i)->chinese,
(ps+i)->math, sum(ps+i), (ps+i)->average);



void get_avg(STD *ps)

ps->average = sum(ps) / 2;


void s_sort(STD *ps)

float temp;
STD pt;
int i;
int j;
for (i=0; i<SIZE; i++)

for (j=i+1; j<SIZE; j++)

if (sum(ps+i) < sum(ps+j))

pt = ps[j];
ps[j] = ps[i];
ps[i] = pt;




static float sum(STD *ps)

return ps->chinese + ps->math;

//--------------------------------
main.c
//--------------------------------
#include <stdio.h>
#include "student.h"

int main(void)

STD std[SIZE];
get_data(std);
s_sort(std);
print_info(std);


复杂的链表实现:

/*头文件*/
#include <stdio.h>
#include<dos.h>
#include<stdlib.h> /*其它说明*/
#include<string.h> /*字符串函数*/
#include<mem.h> /*内存操作函数*/
#include<ctype.h> /*字符操作函数*/
#include<alloc.h> /*动态地址分配函数*/
#define LEN sizeof(STUDENT)
typedef struct stu /*定义结构体数组用于缓存数据*/
char num[6];
char name[5];
int score[3];
int sum;
float average;
int order;
struct stu *next;
STUDENT;

/*函数原型*/
STUDENT *init(); /*初始化函数*/
int menu_select(); /*菜单函数*/
STUDENT *create(); /*创建链表*/
void print(STUDENT *head); /* 显示全部记录*/
void search(STUDENT *head); /*查找记录*/
STUDENT *delete(STUDENT *head); /*删除记录*/
STUDENT *sort(STUDENT *head); /*排序*/
STUDENT *insert(STUDENT *head,STUDENT *new); /*插入记录*/
void save(STUDENT *head); /*保存文件*/
STUDENT *load(); /*读文件*/

/*主函数界面*/
main()
STUDENT *head,new;
head=init(); /*链表初始化,使head的值为NULL*/
for(;;) /*循环无限次*/
switch(menu_select())

case 1:head=create();break;
case 2:print(head);break;
case 3:search(head);break;
case 4:head=delete(head);break;
case 5:head=sort(head);break;
case 6:head=insert(head,&new);break; /*&new表示返回地址*/
case 7:save(head);break;
case 8:head=load(); break;
case 9:exit(0); /*如菜单返回值为9则程序结束*/




/*初始化函数*/
STUDENT *init()

return NULL; /*返回空指针*/


/*菜单选择函数*/
menu_select()
int n;
struct date d; /*定义时间结构体*/
getdate(&d); /*读取系统日期并把它放到结构体d中*/
printf("\n按任一键进入主菜单...... \npress any key to enter the menu......"); /*按任一键进入主菜单*/
getch(); /*从键盘读取一个字符,但不显示于屏幕*/
clrscr(); /*清屏*/
printf("********************************************************************************\n");
printf("\t\t 欢迎 Welcome to\n");
printf("\n\t\t\t 使用学生管理系统1.0\n\n\t\t\t\t\t-----------景炎中学计算机组WJQ\n");
printf("*************************************MENU***************************************\n");
printf("\t\t\t1. 输入学生成绩记录 Enter the record\n"); /*输入学生成绩记录*/
printf("\t\t\t2. 显示 Print the record\n"); /*显示*/
printf("\t\t\t3. 寻找 Search record on name\n"); /*寻找*/
printf("\t\t\t4. 删除 Delete a record\n"); /*删除*/
printf("\t\t\t5. 排序 Sort to make new a file\n"); /*排序*/
printf("\t\t\t6. 插入 Insert record to list\n"); /*插入*/
printf("\t\t\t7. 保存 Save the file\n"); /*保存*/
printf("\t\t\t8. 读取 Load the file\n"); /*读取*/
printf("\t\t\t9. 退出 Quit\n"); /*退出*/
printf("\n\t\t 制作吴俊遒WJQ Made by Wu Junqiu.\n");
printf("********************************************************************************\n");
printf("\t\t\t\t当前系统日期:%d\\%d\\%d\n",d.da_year,d.da_mon,d.da_day); /*显示当前系统日期*/
do
printf("\n\t\t\t输入你的选择Enter your choice(1~9):");
scanf("%d",&n);
while(n<1||n>9); /*如果选择项不在1~9之间则重输*/
return(n); /*返回选择项，主函数根据该数调用相应的函数*/


/*输入函数*/
STUDENT *create()
int i,s;
STUDENT *head=NULL,*p; /* 定义函数.此函数带回一个指向链表头的指针*/
clrscr();
for(;;)
p=(STUDENT *)malloc(LEN); /*开辟一个新的单元*/
if(!p) /*如果指针p为空*/
printf("\n输出内存溢出. Out of memory."); /*输出内存溢出*/
return (head); /*返回头指针,下同*/

printf("输入学号Enter the num(0:list end):");
scanf("%s",p->num);
if(p->num[0]=='0') break; /*如果学号首字符为0则结束输入*/
printf("输入名字Enter the name:");
scanf("%s",p->name);
printf("请输入3门成绩Please enter the %d scores\n",3); /*提示开始输入成绩*/
s=0; /*计算每个学生的总分，初值为0*/
for(i=0;i<3;i++) /*3门课程循环3次*/

do
printf("成绩score%d:",i+1);
scanf("%d",&p->score[i]);
if(p->score[i]<0 || p->score[i]>100) /*确保成绩在0~100之间*/
printf("数据错误,请重新输入 Data error,please enter again.\n");
while(p->score[i]<0 || p->score[i]>100);
s=s+p->score[i]; /*累加各门成绩*/

p->sum=s; /*将总分保存*/
p->average=(float)s/3; /*先用强制类型转换将s转换成float型,再求平均值*/
p->order=0; /*未排序前此值为0*/
p->next=head; /*将头结点做为新输入结点的后继结点*/
head=p; /*新输入结点为新的头结点*/

return(head);


/* 显示全部记录函数*/
void print(STUDENT *head)
int i=0; /* 统计记录条数*/
STUDENT *p; /*移动指针*/
clrscr();
p=head; /*初值为头指针*/
printf("\n************************************STUDENT************************************\n");
printf("-------------------------------------------------------------------------------\n");
printf("| Rec | Num | Name | Sc1 | Sc2 | Sc3 | Sum | Ave | Order |\n");
printf("-------------------------------------------------------------------------------\n");
while(p!=NULL)

i++;
printf("| %3d | %4s | %-4s | %3d | %3d | %3d | %3d | %4.2f | %-5d|\n",
i, p->num,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);
p=p->next;

printf("-------------------------------------------------------------------------------\n");
printf("**************************************END**************************************\n");


/*查找记录函数*/
void search(STUDENT *head)
STUDENT *p; /* 移动指针*/
char s[5]; /*存放姓名用的字符数组*/
clrscr();
printf("请输入个姓名来查找. Please enter name for searching.\n");
scanf("%s",s);
p=head; /*将头指针赋给p*/
while(strcmp(p->name,s) && p != NULL) /*当记录的姓名不是要找的，或指针不为空时*/
p=p->next; /*移动指针，指向下一结点*/
if(p!=NULL) /*如果指针不为空*/
printf("\n*************************************FOUND************************************\n");
printf("-------------------------------------------------------------------------------\n");
printf("| Num | Name | sc1 | sc2 | sc3 | Sum | Ave | Order |\n");
printf("-------------------------------------------------------------------------------\n");
printf("| %4s | %4s | %3d | %3d | %3d | %3d | %4.2f | %-5d|\n",
p->num,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);
printf("-------------------------------------------------------------------------------\n");
printf("***************************************END**************************************\n");

else
printf("\n没有该学生 There is no num %s student on the list.\n",s); /*显示没有该学生*/


/*删除记录函数*/
STUDENT *delete(STUDENT *head)
int n;
STUDENT *p1,*p2; /*p1为查找到要删除的结点指针，p2为其前驱指针*/
char c,s[6]; /*s[6]用来存放学号,c用来输入字母*/
clrscr();
printf("请输入要删除的学号 Please enter the deleted num: ");
scanf("%s",s);
p1=p2=head; /*给p1和p2赋初值头指针*/
while(strcmp(p1->num,s) && p1 != NULL) /*当记录的学号不是要找的，或指针不为空时*/
p2=p1; /*将p1指针值赋给p2作为p1的前驱指针*/
p1=p1->next; /*将p1指针指向下一条记录*/

if(strcmp(p1->num,s)==0) /*学号找到了*/
printf("**************************************FOUND************************************\n");
printf("-------------------------------------------------------------------------------\n");
printf("| Num | Name | sc1 | sc2 | sc3 | Sum | Ave | Order |\n");
printf("-------------------------------------------------------------------------------\n");
printf("| %4s | %4s | %3d | %3d | %3d | %3d | %4.2f | %-5d|\n",
p1->num,p1->name,p1->score[0],p1->score[1],p1->score[2],p1->sum,p1->average,p1->order);
printf("-------------------------------------------------------------------------------\n");
printf("***************************************END**************************************\n");
printf("\n是否要删除,输入Y删除,N则退出\nAre you sure to delete the student Y/N ?"); /*提示是否要删除,输入Y删除,N则退出*/
for(;;)
scanf("%c",&c);
if(c=='n'||c=='N') break; /*如果不删除,则跳出本循环*/
if(c=='y'||c=='Y')

if(p1==head) /*若p1==head，说明被删结点是首结点*/
head=p1->next; /*把第二个结点地址赋予head*/
else
p2->next=p1->next; /*否则将一下结点地址赋给前一结点地址*/
n=n-1;
printf("\n学号为(Num): %s 学生以被删除(student have been deleted.)\n",s);
printf("别忘了保存. Don't forget to save.\n");break; /*删除后就跳出循环*/



else
printf("\n没有这个学生在表上\nThere is no num %s student on the list.\n",s); /*找不到该结点*/
return(head);


/*排序函数*/
STUDENT *sort(STUDENT *head)
int i=0; /*保存名次*/
STUDENT *p1,*p2,*t,*temp; /*定义临时指针*/
temp=head->next; /*将原表的头指针所指的下一个结点作头指针*/
head->next=NULL; /*第一个结点为新表的头结点*/
while(temp!=NULL) /*当原表不为空时，进行排序*/

t=temp; /*取原表的头结点*/
temp=temp->next; /*原表头结点指针后移*/
p1=head; /*设定移动指针p1，从头指针开始*/
p2=head; /*设定移动指针p2做为p1的前驱，初值为头指针*/
while(t->average<p1->average&&p1!=NULL) /*作成绩平均分比较*/

p2=p1; /*待排序点值小，则新表指针后移*/
p1=p1->next;

if(p1==p2) /*p1==p2，说明待排序点值大，应排在首位*/

t->next=p1; /*待排序点的后继为p*/
head=t; /*新头结点为待排序点*/

else /*待排序点应插入在中间某个位置p2和p1之间，如p为空则是尾部*/

t->next=p1; /*t的后继是p1*/
p2->next=t; /*p2的后继是t*/


p1=head; /*已排好序的头指针赋给p1，准备填写名次*/
while(p1!=NULL) /*当p1不为空时，进行下列操作*/

i++; /*结点序号*/
p1->order=i; /*将结点序号赋值给名次*/
p1=p1->next; /*指针后移*/

printf("排序成功 Sorting is sucessful.\n"); /*排序成功*/
return (head);


/*插入记录函数*/
STUDENT *insert(STUDENT *head,STUDENT *new)
STUDENT *p0,*p1,*p2;
int n,sum1,i;
p1=head; /*使p1指向第一个结点*/
p0=new; /*p0指向要插入的结点*/
printf("\nPlease enter a new record.\n"); /*提示输入记录信息*/
printf("输入学号Enter the num:");
scanf("%s",new->num);
printf("输入名字Enter the name:");
scanf("%s",new->name);
printf("Please enter the %d scores.\n",3);
sum1=0; /*保存新记录的总分，初值为0*/
for(i=0;i<3;i++)

do
printf("成绩score%d:",i+1);
scanf("%d",&new->score[i]);
if(new->score[i]>100||new->score[i]<0)
printf("数据错误Data error,please enter again.\n");
while(new->score[i]>100||new->score[i]<0);
sum1=sum1+new->score[i]; /*累加各门成绩*/

new->sum=sum1; /*将总分存入新记录中*/
new->average=(float)sum1/3;
new->order=0;
if(head==NULL) /*原来的链表是空表*/
head=p0;p0->next=NULL; /*使p0指向的结点作为头结点*/
else
while((p0->average<p1->average)&&(p1->next!=NULL))
p2=p1; /*使p2指向刚才p1指向的结点*/
p1=p1->next; /*p1后移一个结点*/

if(p0->average>=p1->average)
if(head==p1)head=p0; /*插到原来第一个结点之前*/
else p2->next=p0; /*插到p2指向的结点之后*/
p0->next=p1;
else
p1->next=p0;p0->next=NULL; /*插到最后的结点之后*/

n=n+1; /*结点数加1*/
head=sort(head); /*调用排序的函数,将学生成绩重新排序*/
printf("\n学生Student %s 已被更新have been inserted.\n",new->name);
printf("不要忘了保存Don't forget to save the new file.\n");
return(head);


/*保存数据到文件函数*/
void save(STUDENT *head)
FILE *fp; /*定义指向文件的指针*/
STUDENT *p; /* 定义移动指针*/
char outfile[10];
printf("输出文件例如:c:\\score Enter outfile name,for example c:\\score\n");
scanf("%s",outfile);
if((fp=fopen(outfile,"w"))==NULL) /*为输出打开一个二进制文件,为只写方式*/

printf("打不开文件Cannot open the file\n");
return; /*若打不开则返回菜单*/

printf("\n保存中...Saving the file......\n");
p=head; /*移动指针从头指针开始*/
while(p!=NULL) /*如p不为空*/

fwrite(p,LEN,1,fp); /*写入一条记录*/
p=p->next; /*指针后移*/

fclose(fp); /*关闭文件*/
printf("保存成功....Save the file successfully!\n");


/* 从文件读数据函数*/
STUDENT *load()
STUDENT *p1,*p2,*head=NULL; /*定义记录指针变量*/
FILE *fp; /* 定义指向文件的指针*/
char infile[10];
printf("倒入文件例如:c:\\score Enter infile name,for example c:\\score\n");
scanf("%s",infile);
if((fp=fopen(infile,"r"))==NULL) /*打开一个二进制文件，为只读方式*/

printf("打不开文件Can not open the file.\n");
return(head);

printf("\n寻找文件...Loading the file!\n");
p1=(STUDENT *)malloc(LEN); /*开辟一个新单元*/
if(!p1)

printf("内存溢出!Out of memory!\n");
return(head);

head=p1; /*申请到空间，将其作为头指针*/
while(!feof(fp)) /*循环读数据直到文件尾结束*/

if(fread(p1,LEN,1,fp)!=1) break; /*如果没读到数据，跳出循环*/
p1->next=(STUDENT *)malloc(LEN); /*为下一个结点开辟空间*/
if(!p1->next)

printf("Out of memory!\n");
return (head);

p2=p1; /*使p2指向刚才p1指向的结点*/
p1=p1->next; /*指针后移，新读入数据链到当前表尾*/

p2->next=NULL; /*最后一个结点的后继指针为空*/
fclose(fp);
printf("\n你成功的从文件中读取了数据!\nYou have success to read data from the file!\n");
return (head);