1.代码

/*-----------------------------------------------------------------------------------------程序名：stu_management.c程序功能：         1.鉴别root权限，设置管理员和学生权限，管理员和学生可以异步登录         （如果加入网络模块就可以实现多用户同步登录）         2.管理员可以设置/查询/修改学生所有账户信息，也可以增加新的管理员         3.学生只有查询账户/课程/奖学金的权限         4.自动生成配置文件，退出时并保存配置文件，防止信息丢失         5.移植程序只需将可执行程序和配置文件移植即可，信息不会丢失程序实现：采用链表加文件操作库函数结合过程控制实现编译：gcc stu_management.c -o stu_management编译环境：gcc 版本 4.5.1 20100924 (Red Hat 4.5.1-4) (GCC) 作者：张峰   [mailto:frankzhang02010@gmail.com]修改日期：2013-12-8-----------------------------------------------------------------------------------------*/#include 
    
     #include 
     
      #include 
      
       #include 
       
        #define N 3                //课程和奖学金种类的总数量和typedef struct SCORE{    char course_name[32];    float score;}Score;typedef struct node{    int auth;    char usr_name[32];    char password[18];    int id;    char stu_name[32];    char major[32];    Score s[N];    struct node* next;}Node;Node *head,*last;int usr_type;char usr_name[32],password[18];const char* f_name="usr_info.conf";void load_data(),save_data(),export_data(),check_admin(),add_admin(),login();void add_student(),search_student(),del(),modify(),modify_password(),logout();void show_score(),search_course();void title_win(),msg_win();int main(){    int ch;    load_data();    title_win();    check_admin();    loop:    printf("请选择用户类型:");    scanf("%d",&usr_type);    if(usr_type!=1 && usr_type!=2)    {        msg_win("没有该用户类型，请重新输入，1表示admin，2表示student\n");        goto loop;    }        if(usr_type==1)    {         title_win();        login();        while(1)        {            msg_win("User Type:Admin");            msg_win("Add/Srch/Del/Mdfy/M_Psd/Quit/Exp/Save");            printf(">");            scanf("%d",&ch);                        switch(ch)            {                case 1:add_student();break;                case 2:search_student();break;                case 3:del();break;                case 4:modify();break;                case 5:modify_password();break;                case 6:logout();break;                case 7:export_data();break;                case 8:save_data();break;                case 9:add_admin();break;                default:break;            }            getchar();            msg_win("按任意键返回");            getchar();            system("clear");        }        }    else    {         title_win();        login();               while(1)        {            msg_win("User Type:Student");            msg_win("ShowScore/SrchCourse/M_Pwd/Quit");            printf(">");            scanf("%d",&ch);                        switch(ch)            {                case 1:show_score();break;                case 2:search_course();break;                case 3:modify_password();break;                case 4:logout();break;                default:break;            }            getchar();            msg_win("按任意键返回");            getchar();            system("clear");        }        }    return 0;}void load_data(){      FILE* fp=NULL;           if(!(fp=fopen(f_name,"a")))    {        msg_win("Open file fail");        return;    }        fclose(fp);    fp=NULL;        if(!(fp=fopen(f_name,"r+")))    {        msg_win("Open file fail");        return;    }        Node* p;    while(1)    {            p=(Node*)malloc(sizeof(Node));        if(!p) continue;        if(!fread(p,sizeof(Node),1,fp))            break;               if(head==NULL)        {            head=last=p;            head->next=NULL;        }        else        {            last->next=p;            last=p;            last->next=NULL;        }      }      fclose(fp);     fp=NULL;     }void save_data(){    FILE* fp=NULL;    if(!(fp=fopen(f_name,"w+")))    {        msg_win("Open file fail");        return;    }        Node* p;    p=head;    while(p)    {        fwrite(p,sizeof(Node),1,fp);         p=p->next;    }    fclose(fp);    fp=NULL;}void export_data(){    FILE* fp;    if(!(fp=fopen("export.log","w+")))    {        msg_win("Open file fail");        return;    }        Node* p;    int i;    p=head;    while(p)    {        fprintf(fp,"%-2d|%-15s|%-18s|%-15s|%-10d|%-18s|\n",p->auth,p->usr_name,p->password,p->stu_name,p->id,p->major);        for(i=0;i
        
         s[i].course_name,p->s[i].score);        fprintf(fp,"\n");         p=p->next;    }    fclose(fp);}void check_admin(){    Node* p;    p=head;    while(p)    {        if(p->auth==1)            return;        p=p->next;    }    p=(Node*)malloc(sizeof(Node));    p->auth=1;    msg_win("请设置管理员账户");    printf("用户名:");    scanf("%s",p->usr_name);    printf("密码:");    scanf("%s",p->password);        if(head==NULL)    {        head=last=p;        head->next=NULL;    }    else    {        last->next=p;        last=p;        last->next=NULL;    }           msg_win("管理员账户设置成功");    sleep(1);    system("clear");}void add_admin(){    Node* p;    p=(Node*)malloc(sizeof(Node));    p->auth=1;    msg_win("添加管理员账户");    printf("用户名:");    scanf("%s",p->usr_name);    printf("密码:");    scanf("%s",p->password);        if(head==NULL)    {        head=last=p;        head->next=NULL;    }    else    {        last->next=p;        last=p;        last->next=NULL;    }           msg_win("新管理员账户设置成功");}void login(){login: system("clear");    msg_win("登录");    printf("用户名:");    scanf("%s",usr_name);    printf("密码:");    scanf("%s",password);        Node* p;    p=head;    while(p)    {        if(!strcmp(p->usr_name,usr_name) && !strcmp(p->password,password) && p->auth==usr_type)        {            msg_win("登录成功");            sleep(1);            system("clear");            return;        }        p=p->next;    }    msg_win("用户名或密码不正确,按任意键重新登录");    getchar();getchar();        goto login;}void add_student(){    Node* p=(Node*)malloc(sizeof(Node));    if(!p)  return ;        p->auth=2;    msg_win("添加学生账户");    printf("用户名:");    scanf("%s",p->usr_name);    printf("密码:");    scanf("%s",p->password);    printf("姓名:");    scanf("%s",p->stu_name);    printf("学号:");    scanf("%d",&(p->id));    printf("专业:");    scanf("%s",p->major);        if(head==NULL)    {        head=last=p;        head->next=NULL;    }    else    {        last->next=p;        last=p;        last->next=NULL;    }           msg_win("学生账户设置成功");}void search_student(){    msg_win("搜索账户信息");    int stu_id,i;    printf("请输入学号:");    scanf("%d",&stu_id);        Node* p;    p=head;    while(p)    {        if(p->id==stu_id)        {            printf("%d %s %s %s %d %s\n",p->auth,p->usr_name,p->password,p->stu_name,p->id,p->major);            for(i=0;i
         
          s[i].course_name,p->s[i].score); printf("\n"); return; } p=p->next; } msg_win("系统中没有该学号");}void del(){ Node *p,*q; int stu_id; msg_win("删除账户信息"); printf("请输入学号:"); scanf("%d",&stu_id); p=head; while(p) { if(p->id==stu_id) { if(head==p) head=head->next; else q->next=p->next; free(p); msg_win("删除成功！"); return; } q=p; p=p->next; } msg_win("删除失败！系统中没有该学号"); }void modify(){ int stu_id,i; msg_win("修改课程成绩和奖学金"); printf("请输入学号:"); scanf("%d",&stu_id); Node* p; p=head; while(p) { if(p->id==stu_id) { for(i=0;i
          
           s[i].course_name,&(p->s[i].score)); return; } p=p->next; } msg_win("系统中没有该学号"); }void modify_password(){ char temp[18],new_password[18]; msg_win("修改密码"); printf("请输入旧密码:"); scanf("%s",temp); printf("请输入新密码:"); scanf("%s",new_password); printf("请确认新密码:"); scanf("%s",password); Node* p; p=head; while(p) { if(!strcmp(usr_name,p->usr_name)) { if(!strcmp(p->password,temp)&& !strcmp(new_password,password)) { strcpy(password,new_password); strcpy(p->password,password); msg_win("密码修改成功"); return; } else { msg_win("输入有误，自动退出"); return; } } p=p->next; }}void logout(){ save_data(); msg_win("成功退出"); exit(1);}void show_score(){ int i; Node* p; p=head; msg_win("所有课程成绩和奖学金"); while(p) { if(!strcmp(usr_name,p->usr_name)) { printf("%d %s %s %s %d %s\n",p->auth,p->usr_name,p->password,p->stu_name,p->id,p->major); for(i=0;i
           
            s[i].course_name,p->s[i].score); printf("\n"); return; } p=p->next; }}void search_course(){ char course_name[32]; int i; msg_win("输入要查询的课程"); printf(">"); scanf("%s",course_name); Node* p; p=head; while(p) { if(!strcmp(usr_name,p->usr_name)) { for(i=0;i
            
             s[i].course_name)) { printf("%s:%-5.1f\n",p->s[i].course_name,p->s[i].score); return; } } } p=p->next; }}char str1[]="Student Information Management System";void title_win(){ int i,M; M=strlen(str1); for(i=0;i
            
           
          
         
        
       
      
     
    

2.配置文件

   配置文件自动生成，在用户当前目录下面，名为usr_info.conf的文件，如果需要移植程序到其他主机上运行而又想数据转移，那么将可执行程序和配置文件一起移植即可

3.效果图

a. 注册root账户

b. 登录

c. admin添加学生账户信息

d. admin添加和修改学生课程成绩和奖学金

e. admin查看学生信息

f. admin或学生修改登录密码

g. 学生账户登录后查询账户信息

h. 学生查询单科成绩