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C++学生信息管理系统

时间：2020-01-27 16:09 编辑：来源：阅读：
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摘要：C++学生信息管理系统

本文实例为大家分享了C++学生信息管理系统源码，供大家参考，具体内容如下 [b]1. tea_list.c [/b]

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include"teacher.h"
int sq_tea ;
PTEA head = NULL ;
FILE *fp ;
int tea_llopen(const char* path)//打开文件
{
  fp=fopen(path,"r");
  if(fp==NULL){
    perror("open fail");
    return -1;}
#ifdef DEBUG
  printf ("debug--001") ;
#endif
  PTEA p;
  int ret;
  while(p)
  {
    p=malloc(sizeof(TEA));
    if(p==NULL){
      perror("申请空间不够");
      return -1;}
    ret=fscanf(fp,"%d%d%d%s%s",
     &p->id,&p->age,&p->wages,p->name,p->passwd);
    if(ret<=0) break;
    if(head==NULL){
      p->next=NULL;
      p->pre=NULL;
      head=p;}
    else{
      p->next=head;
      p->pre=NULL;
      head->pre=p;
      head=p;}
  }
  return 0;
}
#if 1
int tea_llshow( )//显示
{
  if(head==NULL)
  return -1;
  PTEA p=head;
  printf("工号\t年龄\t工资\t姓名\n");
  while(p)
  {
  printf("%d\t%d\t%d\t%s\n",
  p->id,p->age,p->wages,p->name);
  p=p->next;
  }
  return 0;
}
 
PTEA tea_llcheck(PTEA a)//查找
{
  printf("输入查找教师工号\n");
  int id;
  scanf("%d",&id);
      while(getchar()!='\n');
   PTEA p;
   p=head;
   while(p)
   {
     if(p->id==id){
 printf ("工号\t年龄\t薪水\t姓名\n " );
 printf ("%d\t%d\t%d\t%s\n",p->id,p->age,p->wages,p->name);
    break ;
                  }
   p=p->next;
 }
   if (p==NULL) {
        printf ("未找到该教师\n");
        printf ("是否继续查找y/n\n") ;
      char ch ;
      getchar();
      ch=getchar();
      if((ch=='y')||(ch=='Y')) 
      tea_llcheck (p )  ;  
      else
        return NULL ;
   }   
   
return 0;
 
}
#endif
#if 1
int tea_lladd(PTEA b )//增加老师信息
{
#ifdef _DEBUG_ 
  printf ("debug-001\n") ;
#endif
    PTEA p ;
    char ch ;
    p=malloc(sizeof(TEA));
    if(p==NULL){
      perror("申请空间不够\n");
      return -1;}
    printf ("请输入添加老师的信息\n工号\t年龄\t薪水\t姓名\t密码\n") ;
    scanf("%d%d%d%s",&p->id,&p->age,&p->wages,p->name,p->passwd) ;
        while(getchar()!='\n');
    if ( p == NULL )
      return -1 ;
    if ( head == NULL ) //说明链表为空，加入成第一个
    { p->next = NULL ;
      p->pre = NULL ;
      head->pre = p ;
      head = p ; 
    }
     else {
     p->next=head ;
     p->pre=NULL ;
     head->pre = p ;
     head=p ;
     }
/*    fprintf ( fp , "%d\t%d\t%d\t%s\n",p->id,p->age,p->wages,p->name ) ;
       fclose ( fp ) ;
         fopen ("teacher.txt" , "a+");
*/   
 
 
    return 0 ;
}
 
#endif 
#if 1
int tea_lldelete( PTEA a  ) //删除老师
{  int key ;
  printf ("请输入要删除的老师的工号\n") ;
  scanf ("%d",&key);
      while(getchar()!='\n');
  PTEA p ;
  PTEA q ;
  p = head ;
  while (p)
  {  if (p->id == key )
    {
  if( (p == head)&&(head->next!=NULL) )
    { head = head->next ;
     head->pre = NULL ;  
#ifdef _DEBUG_
    printf ("case 1\n") ;
#endif
    }
    else if ((p==head) && ( head->next==NULL))
    { head = NULL ;
#ifdef _DEBUG_
    printf ("case 2\n") ; 
#endif   
    } 
   else if( (p!=head )&&(p->next!=NULL) )
      {p->pre->next=p->next ;
        p->next->pre = p->pre ;
#ifdef _DEBUG_
        printf ("case 3\n ") ; I
#endif 
      }
    else { p->pre->next = NULL ;
#ifdef _DEBUG_ 
       printf ("case 4\n") ; 
#endif 
    }
         break ;
  }  
     p = p->next ;
      
  }
       free (p) ;
    if (p==NULL)
      printf ("未找到该教师") ;
/*   fp = fopen("teacher.txt","r+");
  while(p){
  fprintf (fp ," %d\t%d\t%d\t%s\n" , p->id , p->age ,p->wages , p->name );
    p=p->next ;
  }
   fclose (fp) ;
    tea_llopen ;
*/ }
#endif 
#if 1  
int tea_llchange()//修改老师信息
{ 
  PTEA p;
  printf("\n输入工号");
    int key;
    scanf("%d",&key);
      while(getchar()!='\n');
     p=head;
     while(p)
     {
         if(p->id==key){
     printf("工号\t年龄\t薪水\t姓名\n");
  scanf("%d%d%d%s%s",
    &p->id,&p->age,&p->wages,p->name,p->passwd);
      while(getchar()!='\n');
       break ;
}
         p=p->next;}
 
          p = head ;
  printf ("修改之后为\n");
    printf("学号\t年龄\t数学\t英语\t语文\t班级\t姓名\t密码\n");
    while(p)
    {
  printf("%d\t%d\t%d\t%s\t%s\n",
  p->id,p->age,p->wages,p->name,p->passwd);
    p=p->next;
    }
 
 
 
  return 0;
}
 
 
#endif
 
#if 1
 
PTEA tea_check_id() //校验老师用户名
{
  PTEA p;
  p = head;
  int id;
  char ch;
  printf("请输入您的工号:");
  scanf("%d",&id);
      while(getchar()!='\n');
  while(p)
  {
    if(p->id==id){
      return p;
 
    }
    p = p->next;
  }
  if(p==NULL){
  printf("找不到该用户\n");
  printf("是否重试?[y/n]\n");
// scanf("%c",&ch) ;
 //  getchar () ;
  ch = getchar () ;
  if ((ch=='y')||(ch=='Y'))
      tea_check_id();
  else
    menu();
}
}
#endif
#if 1
PTEA tea_check_passwd() //校验老师密码
{
  PTEA p;
  p =tea_check_id();
  char passwd[20];
  char ch;
  printf("请输入密码:");
  scanf("%s",passwd); 
      while(getchar()!='\n');
  if(strcmp (p->passwd , passwd)==0)
  { 
    sq_tea = p->id ;
#ifdef _DEBUG_
    printf("================%d\n",p->id) ;
    printf("================%d\n",sq_tea) ;
    getchar();
    getchar();
#endif
    return p;
  }else{
  printf("密码不正确\n");
  printf("是否重新输入[y/n]\n");
// getchar() ;
  ch = getchar () ;
      while(getchar()!='\n');
  if((ch=='y')||(ch=='Y'))
    tea_check_passwd();
  else
    menu();
  }
  return NULL;
}
#endif
#if 1
int tea_change_passwd()
{
  PTEA p;
  p=tea_check_passwd();
  char new_passwd[20];
  char new[20];
  char ch;
  printf("请输入新密码:");
  scanf("%s",new_passwd);
    while(getchar() != '\n');
  printf("请再次输入新密码:");
  scanf("%s",new);
    while(getchar() != '\n');
  if(strcmp(new_passwd,new)==0)
  {
    strcpy(p->passwd,new_passwd) ;
     printf("密码修改成功!\n");
 
 
  //  tea_write() ;
  }
  else
  {
  printf("密码输入错误\n");
  printf("是否重试[y/n]\n");
// getchar();
  ch=getchar() ;
      while(getchar()!='\n');
  if((ch=='y')||(ch=='Y'))
    tea_change_passwd();
  else
    exit(1);
  }
  return 0;
}
#endif
 
#if 1
int tea_lookme()
{
  PTEA p;
  p = head ;
  while (p) { 
   if( p->id == sq_tea ) {
  printf("工号\t年龄\t薪水\t姓名\t密码\n");
    printf("%d\t%d\t%d\t%s\n%s\n",
      p->id,p->age,p->wages,p->name,p->passwd);
   }
  p = p->next ;
} 
 return 0 ;
}
#endif
 
 
#if 1
 
int tea_write()
{
   PTEA p;
  //  PTEA head ;
   FILE *fp;
    p=head;
   fp=fopen("teacher.txt","w+");
   while(p)
    {  
    fprintf( fp, 
         "%d\t%d\t%d\t%s\t%s\n",
         p->id,p->age,p->wages,p->name,p->passwd);
         p=p->next;
                                 }  
                return 0;
}
 
 
#endif
 
 
#if 0
int main(int argc,char * argv[])
{
  if(argc<2){
    printf("execult error");
    return -1;}
  int ret;
  PTEA p;
  ret=tea_llopen(argv[1]);
    if(ret<0){
      printf("list is end\n");
      return -1;}
// tea_llshow(head);
// int id;
/* p=tea_llcheck();
  printf("%d\t%d\t%d\t%s\n",
  p->id,p->age,p->wages,p->name);
*/ //tea_llshow();
// tea_lladd(head) ;
// tea_llshow(head) ;
//  tea_lldelete( head ) ;  
 //  tea_llshow(head) ;
  tea_llcheck(head) ;
   return 0;
 }
#endif

[b]2. stu_list.c [/b]

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include"student.h"
PSTU head1 = NULL ;
int sq_stu ;
#if 1
  FILE*fp;
int stu_llopen(char* path)//打开文件
{
  fp=fopen(path,"r");
  if(fp==NULL){
    perror("open fail");
    return -1;}
#ifdef _DEBUG_
     printf ("open susess\n") ;
#endif
  PSTU p;
  int ret;
  while(p)
  {  
#ifdef _DEBUG_
    perror("while -time\n");
#endif
    p=malloc(sizeof(STU));
    if(p==NULL){
      printf("申请空间不够");
      return -1;}
    ret=fscanf(fp,"%d%d%d%d%d%d%s%s",
     &p->id,&p->age,&p->math,&p->english,
     &p->chinese,&p->class,p->name,p->passwd);
#ifdef _DEBUG_
    printf("ret is ok\n") ;
#endif
    if(ret<=0) {
#ifdef _DEBUG_
      printf ("list is end \n ") ;
#endif
      break;
    }
    if(head1==NULL){
      p->next=NULL;
      p->pre=NULL;
      head1=p;}
    else{
      p->next=head1;
      p->pre=NULL;
      head1->pre=p;
      head1=p;} 
  }
  return 0;
}
#endif
int stu_llshow()//显示
{
// FILE *fp;
  if(head1==NULL)
  return -1;
  PSTU p=head1;
  printf("学号\t年龄\t数学\t英语\t语文\t班级\t姓名\n");
  while(p)
  {
  printf("%d\t%d\t%d\t%d\t%d\t%d\t%s\n",
  p->id,p->age,p->math,p->english,p->chinese,
  p->class,p->name);
  p=p->next;
  }
//   fflush(stdout) ;
  return 0;
}
 
int stu_llcheck()//查找
{
  printf("\n输入查找学号\n");
  int key;
  scanf("%d",&key);
    while(getchar()!='\n');
     PSTU p;
   p=head1;
  if(head1==NULL) 
 {
  printf ("打开链表失败") ;
    return -1;
 }
   while(p)
   {
     if(p->id==key) {
#ifdef _DEBUG_
  printf ("while p ") ;   
#endif
  printf("%d\t%d\t%d\t%d\t%d\t%d\t%s\n",
  p->id,p->age,p->math,p->english,p->chinese,
  p->class,p->name);
        break ;
}       
       p=p->next;
       }
 
    if (p==NULL) {
    printf ("未找到该学生");
    printf ("是否继续查找y/n") ;
    char ch ;
    ch=getchar();
    while(getchar()!='\n');
    if((ch='y')||(ch=='Y')) 
       stu_llcheck()  ;
     else exit(1) ;
 
   }
 
return 0;
}
int __stu_lladd(PSTU p)//被调用添加
{
  if(p==NULL) return -1;
  if(head1==NULL){
   p->next=NULL;
   p->pre=NULL;
   head1->pre=p;
   head1=p;}
 else{
   p->next=head1;
   p->pre=NULL;
   head1->pre=p;
   head1=p;}
 return 0;
}
int stu_lladd()//添加
{
  PSTU p;
 p=malloc(sizeof(STU));
 if(p==NULL) return -1;
  printf("\n输入添加学生信息\n\n");
  printf("学号\t年龄\t数学\t英语\t语文\t班级\t姓名\t密码\n");
  scanf("%d%d%d%d%d%d%s",
    &p->id,&p->age,&p->math,&p->english,
    &p->chinese,&p->class,p->name,p->passwd);
  __stu_lladd(p);
/* fprintf( fp ,
      "%d\t%d\t%d\t%d\t%d\t%d\t%s\n",
      p->id,p->age,p->math,p->english,p->chinese,p->class,p->name  );
  fclose (fp) ;
    fp = fopen ("student.txt","r" ) ;
*/
 return 0;
}
#if 1
int __stu_lldelete(int id)//被调用的删除
{
   PSTU p;
   PSTU q=NULL;
   p=head1;
   while(p)
   {
   if(p->id==id){
     if(p==head1){
       if(head1->next){
         head1=head1->next;
         head1->pre=NULL;}
       else{
         head1=NULL;}
           }
       else{
         if(p->next){
           p->pre->next=p->next;
           p->next->pre=p->pre;}
         else{
           p->pre->next=NULL;}
       }
     
     break;
   }
    p=p->next;
   } 
     if (p==NULL) {
           printf ("未找到该学生\n");
 
     }
     free(p);
/*    fclose (fp) ;
    p=head1 ;
    fp = fopen("student.txt","w+");
  while(p){
  fprintf (fp ,
      "%d\t%d\t%d\t%d\t%d\t%d\t%s\n", 
    p->id,p->age,p->math,p->english,p->chinese,p->class, p->name);  
     p=p->next ;
                        }  
                 fclose (fp) ;
                fp = fopen ("student.txt","r" ) ;
                 p=head1 ;
                stu_llopen("") ;
*/}
int stu_lldelete()//删除
{
    int id;
    PSTU p;
  printf("\n输入删除学号\n");
  scanf("%d",&id);
  while(getchar()!='\n') ;
  return __stu_lldelete(id);
}
#endif
#if 1
int stu_llchange()//修改
{ 
  PSTU p;
  printf("\n输入修改学号");
    int key;
    scanf("%d",&key);
    while(getchar() != '\n');
     p=head1;
     while(p)
     {
         if(p->id==key){
     printf("学号\t年龄\t数学\t英语\t语文\t班级\t姓名\t密码\n");
  scanf("%d%d%d%d%d%d%s%s",
    &p->id,&p->age,&p->math,&p->english,
  &p->chinese,&p->class,p->name,p->passwd);
 
       break ;
}
         p=p->next;}
 
/* fprintf( fp ,
      "%d\t%d\t%d\t%d\t%d\t%s\t%d\n",
      p->id,p->age,p->math,p->english,p->chinese,p->name,p->class  );
  printf("学号\t年龄\t数学\t英语\t语文\t姓名\t班级");
*/   p = head1 ;
  printf ("修改之后为\n");
    printf("学号\t年龄\t数学\t英语\t语文\t班级\t姓名\n");
    while(p)
    {
  printf("%d\t%d\t%d\t%d\t%d\t%d\t%s\n",
  p->id,p->age,p->math,p->english,p->chinese,
    p->class,p->name);
    p=p->next;
    }
 
 
 
  return 0;
}
#endif
#if 1 //排序
int stu_sort()
{
  PSTU p ;
// p->sum == (p->math + p->english + p->chinese) ;
PSTU new_head1=NULL;
PSTU q=NULL,max=head1,prev;
 printf ("按照总成绩排序\n");
while(head1)
{
  //1,找到最大分数的节点地址
  max = head1;
  prev=q=NULL;
  p=head1;
  while(p)
  {
    if( (p->math+p->english+p->chinese) > (max->math+max->english+max->chinese) )
    {
      max = p;
      prev= q;
    }
    q = p;
    p=p->next;
  }
  if(prev){
    prev->next = max->next;
  }else{
     head1= head1->next;
  }
 
  //3,把该节点头插到新链表头指针
  max->next = new_head1;
  new_head1 = max;
}
head1 = max;
stu_llshow() ;
 return 0 ;
}
#endif
 
#if 1
PSTU stu_check_id() //校验学生用户名
{
  PSTU p;
  p = head1;
  int id;
  char ch;
  printf("请输入您的学号:");
  scanf("%d",&id);
    while(getchar() != '\n');
  while(p)
  {
    if(p->id==id){
      return p;
    }
    p = p->next;
  }
    printf ("找到该用户\n") ;
  if(p==NULL){
  printf("找不到该用户\n");
  printf("是否重试?[y/n]\n");
  ch = getchar () ;
   while(getchar()!='\0');
  if ((ch=='y')||(ch=='Y'))
      stu_check_id();
  else
    menu();
}
}
#endif
#if 1
PSTU stu_check_passwd() //校验学生密码
{
  PSTU p;
  p =stu_check_id();
  char passwd[20];
  char ch;
  printf("请输入密码:");
  scanf("%s",passwd);
   while(getchar()!='\n') ;
  if(strcmp (p->passwd , passwd)==0)
   {
    sq_stu = p->id ;
    return p;
  }else{
  printf("密码不正确\n");
  printf("是否重新输入[y/n]\n");
  ch = getchar () ;
    while(getchar()!='\n');
  if((ch=='y')||(ch=='Y'))
    stu_check_passwd();
  else
    menu();
  }
  return NULL;
}
#endif
#if 1
int stu_change_passwd()
{
  PSTU p;
  p=stu_check_passwd();
//  p->passwd=1234;
  char new_passwd[20];
  char new[20];
  char ch;
  printf("请输入新密码:");
  scanf("%s",new_passwd);
  while(getchar() != '\n');
  printf("请再次输入新密码:");
  scanf("%s",new);
   while(getchar()!='\n') ;
  if(strcmp(new_passwd,new)==0)
  {
    strcpy(p->passwd,new_passwd) ;
     printf("密码修改成功!\n");
  }
  else
  {
  printf("密码输入错误\n");
  printf("是否重试[y/n]\n");
  ch=getchar();
  while (getchar()!='\n') ;
  if((ch=='y')||(ch=='Y'))
    stu_change_passwd();
  else
    student_menu();
  }
  return 0;
}
#endif
 
#if 1
int stu_lookme()
{
  PSTU p;
  p = head1 ;
#ifdef _DEBUG_
    printf ("%d\n",sq_stu) ;
#endif
  while (p) {
       if (p->id==sq_stu){ 
       printf("学号\t年龄\t数学\t英语\t语文\t班级\t姓名\t密码\n");
       printf("%d\t%d\t%d\t%d\t%d\t%d\t%s\t%s\n",
       p->id,p->age,p->math,p->english,p->chinese, p->class,p->name,p->passwd);
  }           p = p->next ;
              
  } 
  return 0 ; 
}
 
#endif
#if 1
 
int stu_write()
{
  PSTU p;
  FILE *fp;
// PSTU head1 ;
  p=head1;
  fp=fopen("student.txt","w");
  while(p)
  {
  fprintf( fp,
      "%d\t%d\t%d\t%d\t%d\t%d\t%s\t%s\n",
       p->id,p->age,p->math,p->english,p->chinese,p->class,p->name,p->passwd);
         p=p->next;
  }
  return 0;
}
#endif
#if 1 
void stu_check_class() 
{
int class ;
PSTU p ;
int i=0 ;
p = head1 ;
printf ("请输入您要查找的班级:\n");
scanf ("%d",&class);
   while(getchar()!='\n') ;
while (p){ 
  if (p->class==class ) {
    printf("%d\t%d\t%d\t%d\t%d\t%d\t%s\n",
        p->id,p->age,p->math,p->english,p->chinese,
        p->class,p->name); 
           i++ ; }
          p=p->next;  
   
}
    if((p==NULL)&&(i==0))
  printf("未找到该班级\n");
  
}
 
#endif
 
#if 0
int main(int argc,char * argv[])
{
 /*  if(argc<2){
    printf("execult error");
    return -1;}
*/ int ret;
  PSTU p;
  ret=stu_llopen("student.txt");
    if(ret<0){
      printf("创建失败\n");
      return -1;}
 
  printf ("debug-000\n") ;
 
// int id;
    stu_llshow();
// stu_lldelete();
//     stu_llcheck() ;
// stu_llshow();
  stu_check_class() ; 
// stu_llchange();
// sleep (1) ;
// stu_llshow();
// stu_sort();
// stu_llshow();
return 0;
}
#endif

[b]3. student.txt [/b]1002 25 100 90 85 1 s1 000 1003 25 107 90 84 1 s1 000 1004 25 100 90 80 1 s1 000 1005 25 107 90 80 1 s1 000 1006 25 100 90 80 1 s1 000 1007 25 108 90 80 1 s1 000 1008 25 100 78 80 1 s1 000 1009 25 100 90 80 1 s1 000 1010 25 100 45 80 1 s1 000 1012 25 90 90 80 1 s1 000 [b]4. teacher.txt [/b]10002 75 4500 wang2 000 10003 75 4500 wang3 000 10004 75 4500 wang4 000 10005 75 4500 wang5 000 10006 75 4500 wang6 000 10007 75 4500 wang7 000 10008 75 4500 wang8 000 10009 75 4500 wang9 000 10010 75 4500 wang10 000 10011 75 4500 wang11 000 10012 75 4500 wang12 000 10013 75 4500 wang13 000 10014 75 4500 wang14 000 10015 75 4500 wang15 000 10016 75 4500 wang16 000 10017 75 4500 wang17 000 10018 75 4500 wang18 000 [b]5. menu.c [/b]

#include"student.h"
#include"teacher.h"
#if 1
void admin_menu_1()
{
  char u[20]="";
  char u1[20]="admin";
  char p[20]="";
  char p1[20]="admin";
  while (1)
  {
  printf("管理员用户名\n");
  scanf("%s",u);
       while(getchar()!= '\n');
  printf("管理员密码\n");
  scanf("%s",p);
       while(getchar()!= '\n');
  if (strcmp(u,u1)==0&&strcmp(p,p1)==0)
           admin_menu_2()  ;
  else
    printf ("输入用户名或密码不正确，是否重试y/n\n");
    char ch ;
    ch=getchar() ;
        while(getchar()!= '\n');
    if ((ch=='y')||(ch=='Y'))
       admin_menu_1() ;
     else
           menu() ;
      
  }
}
#endif
#if 1
void admin_menu_2() {
  while(1)
  { system ("clear");
   printf("\n\n\n");        
   printf("\t\t\t\t******************************\n");
   printf("\t\t\t\t*     1.管理老师    *\n");
   printf("\t\t\t\t*     2.管理学生    *\n");
   printf("\t\t\t\t*     0.返回      *\n");
   printf("\t\t\t\t******************************\n");
   printf("\t\t\t\t请输入数字选择\n");
     char ch ;     
     ch=getchar();
     while(getchar()!= '\n');
   switch(ch)
   {
     case '1':
         admin_menu_2_1() ;
             break ;
     case '2':
          admin_menu_2_2() ;
              break ;
     case '0':
         menu();
     default:
             admin_menu_2() ;
             break;
  }
  }
 
  }
 
#endif 
#if 1
void teacher_menu() 
{
 tea_check_passwd();
 
 
  char ch;
  while(1)
  {    
    printf("\n\n\n");        
    printf("\t\t\t\t******************************\n");
    printf("\t\t\t\t*  1.查找学生信息      *\n");
    printf("\t\t\t\t*  2.按总成绩排名     *\n");
    printf("\t\t\t\t*  3.修改老师密码     *\n");
    printf("\t\t\t\t*  4.查看我的信息     *\n");
    printf("\t\t\t\t*  5.按照班级查找学生   *\n");
    printf("\t\t\t\t*  0.返回         *\n");
    printf("\t\t\t\t******************************\n");
     printf("\t\t\t\t请输入数字选择\n");        
    ch=getchar();
    while(getchar()!='\n');
    switch(ch)
    {
      case '1':
        //admin_tea_delete();break;
          stu_llshow();
          stu_llcheck();
          break;
      case '2':
           stu_sort() ;
           break ;
      case '3':
           printf ("修改老师密码\n") ;
            tea_change_passwd() ;
            break ;
      case '4':
            printf("我的信息\n");
            tea_lookme() ;
            break;
        case '5':
            printf("按照班级查找\n");
                        stu_check_class();
             break ;
      case '0':
                 menu();
      default :
            printf("字符不符\n");
            break;
        }
       }
          }    
#endif 
#if 1  
void student_menu()
{
  stu_check_passwd();
  while(1)
  {      
    printf("\n\n\n");        
    printf("\t\t\t\t******************************\n");
    printf("\t\t\t\t*  1.查询我的信息     *\n");
    printf("\t\t\t\t*  2.修改学生密码     *\n");
    printf("\t\t\t\t*  0.返回         *\n");
    printf("\t\t\t\t******************************\n");
    printf("\t\t\t\t请输入数字选择\n");     
         char ch;   
        ch=getchar();
    while(getchar()!='\n');
    switch(ch)
    {
      case '1':
        printf("查询我的信息\n");
                  stu_lookme();
        break;
      case '2':
        printf("修改密码\n");
         stu_change_passwd();
        break;
      case '0':
        menu() ;// break;//exit(0);
      default :
        printf("请输入\n");
        break;
    }
  }
 
 
}
#endif
 
#if 1
void menu()
{
 char ch;
  while(1)
  {  system ("clear");     
   printf("\n\n\n");        
    printf("\t\t\t\t******************************\n");
    printf("\t\t\t\t*  欢迎进入学生管理系统  *\n");
    printf("\t\t\t\t******************************\n");
    printf("\t\t\t\t*    1.管理员登录    *\n");
    printf("\t\t\t\t*    2.老师登录     *\n");
    printf("\t\t\t\t*    3.学生登录     *\n");
    printf("\t\t\t\t*    0.保存并退出    *\n");
    printf("\t\t\t\t******************************\n");
    printf("\t\t\t\t请输入数字选择\n");  
          
    ch=getchar(); 
    while(getchar()!= '\n');
    switch(ch)
    {
      case '1':
        admin_menu_1();break;
      case '2':
       teacher_menu(); break;
      case '3':
              student_menu();break;
      case '0': 
              tea_write() ;
        stu_write() ;
       exit(0) ; //break;//exit(0);
      default :
        printf("输入不存在的字符\n");
        break;
    }
  }
}
#endif 
#if 1
void admin_menu_2_1() {
 
while(1) 
       {  
        printf("\n\n\n");        
        printf("\t\t\t\t******************************\n");
        printf("\t\t\t\t*     1.删除老师     *\n");
        printf("\t\t\t\t*     2.添加老师     *\n");
        printf("\t\t\t\t*     3.查找老师     *\n");
        printf("\t\t\t\t*     4.修改老师     *\n");
        printf("\t\t\t\t*     5.查看全部老师   *\n");
        printf("\t\t\t\t*     0.返回       *\n");
        printf("\t\t\t\t******************************\n");
        printf("\t\t\t\t请输入数字选择\n");        
        char ch ;
        ch=getchar();
                while(getchar()!='\n');
        switch(ch)
        {
          case '1':
            //admin_tea_delete();break;
            printf("删除教师\n");
            tea_llshow( ) ;
            tea_lldelete() ;
            break;
          case '2':
            printf("添加教师\n");
            tea_lladd( ) ;
            tea_llshow() ;
            break;
            //admin_tea_add();break;
          case '3':
            printf("查找教师\n");
            tea_llcheck( ) ;
            break;
            //admin_tea_cheak();break;
          case '4':
            printf("修改老师\n");
                        tea_llchange() ;
                        break;
          case '5':
            printf("查看全部老师\n");
                        tea_llshow() ;
                        break;
            //   
          case '0':
             admin_menu_2() ;// break;//exit(0);
          default :
            printf("字符不符\n");
            break;
        }
       }
 
 
}
#endif
#if 1
void admin_menu_2_2() {
        while(1)
   {   
        printf("\n\n\n");        
        printf("\t\t\t\t******************************\n");
        printf("\t\t\t\t*     1.删除学生     *\n");
        printf("\t\t\t\t*     2.添加学生     *\n");
        printf("\t\t\t\t*     3.查找学生     *\n");
        printf("\t\t\t\t*     4.修改学生     *\n");
    printf("\t\t\t\t*     5.查看全部学生   *\n");
        printf("\t\t\t\t*     0.返回       *\n");
        printf("\t\t\t\t******************************\n");
        printf("\t\t\t\t请输入数字选择\n"); 
                char ch ;       
        ch=getchar();
        while(getchar()!='\n'); 
        switch(ch)
        {
          case '1':
            printf ("删除学生"); 
            stu_llshow();
            stu_lldelete(); 
            stu_llshow();
            break ;
          case '2':
            printf("添加学生\n");
            stu_lladd(); 
            stu_llshow();
            break ;
          case '3':
            printf("查找学生\n");
            stu_llcheck();
            break;
          case '4':
            printf("修改学生\n");
            stu_llchange();
            break;
          case '5':
            printf("查看全部学生\n");
                        stu_llshow() ;
                        break;
          case '0':
                admin_menu_2() ;
          default :
            printf("请选择\n");
            break;
        }
       }
}
#endif
#if 1
int main()
{   
  stu_llopen(FILENAME1);
    tea_llopen(FILENAME);
#ifdef _DEBUG_
    stu_llshow();
    tea_llshow();
#endif
    sleep(1);
    system ("clear");
  menu();
 
}
#endif

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