c 班级管理系统

文档 主要包含以下数据 账号信息:id, 密码，身份信息. 学生信息:id, 姓名，c 语言成绩，英语成绩，数学成绩，总成绩. 采用二进制文本的形式储存

实现有以下功能:

• 添加学生 (教师) 账号信息
• 浏览所有学生信息
• 按照指定 id 查询信息
• 修改指定 id 信息
• 删除指定 id 信息
• 修改密码
• 重置系统

扩展功能:

• 排序浏览
• 学生和账号信息分别存放在不同的文件中
• 把文件中的学生和账号信息导入的程序中

  #include <stdio.h>
  #include <stdlib.h>
  #include <windows.h>
  #include <string.h>
  #define SUPERKEY 123456
  typedef struct Class {
      long long id;
      char name[10];
      int cScore;
      int mathScore;
      int englishScore;
      int allScore;
      struct Class *next;
  } Class;
  typedef struct Identity {
      long long id;
      long long key;
      int identity;            ///1表示教师,0表示学生;
      struct Identity *next;
  } Identity;
  void Show(char*);
  void Print(Class *s) {       ///对内容进行输出
      printf("     %-10lld  %-13s%-13d%-13d%-13d%-5d\n",s->id,s->name,s->cScore,s->mathScore,s->englishScore,s->allScore);
  };
  
  void Init();                                                     ///系统重置
  void GotoTeacher(long long,long long,Identity*,Class*);          ///教师端
  void GotuStudent(long long,long long,Identity*,Class*);          ///学生端
  void Admin(void*);                                               ///管理员界面
  
  void LogIn();                                                    ///登录端口
  void GotoXY(int,int);                                            ///移动光标到输入栏
  long long KeyIn();                                               ///密文输入
  int LoadInformation(long long,long long);                        ///加载账号信息;
  
  void SaveFile(void *,char*);                                     ///存文件
  void *readFile(char*);                                           ///读取文件
  
  void Add(Class*,Identity*,char*);                                ///添加
  void Change(long long,void*,char*);                              ///修改
  void *Find(long long id,void *head,char*func);                   ///查找(*->next即为查找到的数据)
  void ViewAll(Class *);                                           ///查看所有
  void Delete(long long,Class*,Identity*,char*);                   ///删除
  void Sort(Class*);                                             ///排序
  int main() {
      LogIn();
      return 0;
  }
  
  long long KeyIn() {           ///密文输入****
      char key[20], c;
      int i = 0;
      memset(key,0,sizeof(key));
      while ((c = getch())!='\r') {
          if(c != 8) {
              key[i++] = c;
              printf("*");
          } else {
              printf("\b \b");
          }
      }
      key[i] = 0;
      return atoll(key);
  }
  void GotoXY(int x,int y) {    ///定位光标位置到指定坐标
      HANDLE hOut;
      hOut = GetStdHandle(STD_OUTPUT_HANDLE);
      COORD pos= {x,y};
      SetConsoleCursorPosition(hOut,pos);
  }
  
  void LogIn() {                ///登录界面
      long long id;
      long long key;
      while(1) {
          Show("Login");
          GotoXY(13,3);
          scanf("%lld",&id);
          GotoXY(13,5);
          key = KeyIn();
          LoadInformation(id,key);
  
      }
  }
  int LoadInformation(long long id,long long key) {
      Identity *accont = (Identity*)readFile("ACC");
      Class *student = (Class*)readFile("STU");
      Identity *p = accont;
      Show("Load");
      while(p = p->next) {
          if(p->id == id&&p->key == key) {
              if(p->identity)
                  GotoTeacher(id,key,accont,student);
              else
                  GotuStudent(id,key,accont,student);
              return 0;
          }
      }
      long long superKey;
      system("cls");
      printf("┌────────────────────────────────────┐\n");
      printf("│账号密码错误!!!                     │\n");
      printf("│请输入管理员密码:                   │\n");
      printf("└────────────────────────────────────┘\n");
      GotoXY(19,2);
      superKey = KeyIn();
      if(superKey == SUPERKEY)
          Admin(accont);
      else {
          getchar();
          printf("\n\n密码错误!");
          Sleep(2000);
      }
      system("cls");
      return 1;
  }
  
  void ViewAll(Class *head) {
      Class *p = head;
      Show("splitter");
      while(p = p->next)
          Print(p);
  }
  
  void ViewAllAcc(Identity*head) {
      Identity *p = head;
      Show("splitter");
      while(p = p->next)
          printf("%10lld%10d\n",p->id,p->key);
  }
  
  void Add(Class *student,Identity*accont,char*func) {
      Identity *addAccont = (Identity*)malloc(sizeof(Identity));
      printf("请输入你要添加的id:\n");
      if(strcmp(func,"STU")==0) {
          Class *add = (Class*)malloc(sizeof(Class));
          scanf("%lld",&add->id);
          if(((Identity*)Find(add->id,accont,"ACC"))->next) {
              printf("此id已存在\n");
              free(add);
              free(addAccont);
              return;
          }
          printf("请输入该生名字:\n");
          scanf("%s",add->name);
          printf("请输入c成绩,数学成绩,英语成绩(以空格隔开)\n");
          scanf("%d%d%d",&add->cScore,&add->mathScore,&add->englishScore);
          add->allScore = add->cScore+add->mathScore+add->englishScore;
  
          addAccont->id = add->id;
          addAccont->key = 123456;
          addAccont->identity = 0;
  
          add->next = student->next;
          student->next = add;
          SaveFile(student,"STU");
      } else {
          scanf("%lld",&addAccont->id);
          if(((Identity*)Find(addAccont->id,accont,"ACC"))->next) {
              printf("此id已存在\n");
              free(addAccont);
              return;
          }
          printf("请输入该账号的初始密码:\n");
          addAccont->key = KeyIn();
          addAccont->identity = 1;
      }
      addAccont->next = accont->next;
      accont->next = addAccont;
      SaveFile(accont,"ACC");
  }
  void Change(long long id,void *head,char* func) {
      if(strcmp(func,"STU")==0) {
          Class *Cur = ((Class*)Find(id,head,"STU"))->next;
          if(Cur) {
              printf("请按照姓名,c语言成绩,数学成绩,英语成绩的格式输入(以空格隔开)\n");
              scanf("%s%d%d%d",Cur->name,&Cur->cScore,&Cur->mathScore,&Cur->englishScore);
              Cur->allScore = Cur->cScore + Cur->englishScore + Cur->mathScore;
          } else
              printf("查无此人\n");
          SaveFile(head,"STU");
      } else {
          Identity *Cur = ((Identity*)Find(id,head,"ACC"))->next;
          printf("请输入新密码:\n");
          Cur->key = KeyIn();
          printf("\n");
          SaveFile(head,"ACC");
      }
  }
  void Delete(long long id,Class*student,Identity*accont,char*func) {
      if(strcmp(func,"STU")==0) {
          Class *p = Find(id,student,"STU");
          if(p->next) {
              Class *r = p->next;
              p->next = r->next;
              free(r);
          } else {
              printf("操作有误\n");
              return;
          }
          SaveFile(student,"STU");
      }
  
      Identity *p = Find(id,accont,"ACC");
      if(p->next) {
          if(p->identity==0) {
              Class *r = p->next;
              p->next = r->next;
              free(r);
          }
      } else {
          printf("操作有误\n");
      }
      SaveFile(accont,"ACC");
      printf("成功!!!\n");
  }
  void *Find(long long id,void *head,char *func) {
      if(strcmp(func,"STU")==0) {
          Class *p = (Class*)head;
          while(p->next&&p->next->id !=id)
              p = p->next;
          return p;
      } else {
          Identity *p = (Identity*)head;
          while(p->next&&p->next->id !=id)
              p = p->next;
          return p;
      }
  }
  void *readFile(char*func) {
      FILE* fp;
      if(strcmp(func,"STU")==0) {
          Class *head = (Class*)malloc(sizeof(Class));
          Class *p,*r = head;
          head->next = NULL;
          fp = fopen("student.txt", "ab+");
          while(1) {
              p=(Class*)malloc(sizeof(Class));
              if(fread(p,sizeof(Class)-sizeof(Class*),1,fp)) {
                  r->next = p;
                  r = p;
              } else
                  break;
          }
          r->next = NULL;
          return head;
      } else {
          Identity *head = (Identity*)malloc(sizeof(Identity));
          Identity *p,*r = head;
          head->next = NULL;
          fp = fopen("accont.txt", "ab+");
          while(1) {
              p=(Identity*)malloc(sizeof(Identity));
              if(fread(p,sizeof(Identity)-sizeof(Identity*),1,fp)) {
                  r->next = p;
                  r = p;
              } else
                  break;
          }
          r->next = NULL;
          return head;
      }
  }
  
  void SaveFile(void *head,char*func) {
      FILE *fp;
      if(strcmp(func,"STU")==0) {
          fp = fopen("student.txt","wb");
          Class* p = (Class*)head;
          while(p = p->next)
              fwrite(p,sizeof(*p)-sizeof(Class*),1,fp);
      } else {
          fp = fopen("accont.txt","wb");
          Identity* p = (Identity*)head;
          while(p = p->next)
              fwrite(p,sizeof(*p)-sizeof(Identity*),1,fp);
      }
      fclose(fp);
  }
  
  void GotuStudent(long long id,long long key,Identity* accont,Class*student) {   ///学生端
      int input;
      while(1) {
          Show("student");
          scanf("%d",&input);
          switch(input) {
          case 1:
              Show("splitter");
              Print(((Class*)(Find(id,student,"STU")))->next);
              break;
          case 2:
              Change(id,accont,"ACC");
              break;
          case 3:
              return;
          default:
              printf("输入有误");
          }
          system("pause");
      }
  }
  
  void GotoTeacher(long long id,long long key,Identity*accont,Class*student) {               ///教师端
      while(1) {
          Show("teacher");
          int input;
          scanf("%d",&input);
          switch(input) {
          case 1:
              Add(student,accont,"STU");
              break;
          case 2:
              Sort(student);
              ViewAll(student);
              break;
          case 3: {
              long long findId;
              printf("请输入查询的id:\n");
              scanf("%lld",&findId);
              Class* find = ((Class*)Find(findId,student,"STU"))->next;
              if(find) {
                  Show("splitter");
                  Print(find);
              } else
                  printf("查无此人\n");
              break;
          }
          case 4: {
              long long changeId;
              printf("请输入修改的id:\n");
              scanf("%lld",&changeId);
              Change(changeId,student,"STU");
          }
          break;
          case 5: {
              long long deleteId;
              printf("请输入要删除的id:\n");
              scanf("%lld",&deleteId);
              Delete(deleteId,student,accont,"STU");
              break;
          }
          case 6:
              Change(id,accont,"ACC");
              break;
          case 7:
              return;
          default:
              printf("输入错误,请重新输入\n");
              Sleep(1000);
          }
          system("pause");
      }
  }
  void Admin(void *head) {
      while(1) {
          system("cls");
          Show("Admin");
          int input;
          scanf("%d",&input);
          switch(input) {
          case 1:
              Add(NULL,head,"ACC");
              break;
          case 2: {
              long long deleteId;
              printf("请输入要删除的id:\n");
              scanf("%lld",&deleteId);
              Delete(deleteId,NULL,head,"ACC");
              break;
          }
          case 3:
              return;
          case 4:
              Init();
              break;
          default:
              printf("输入有误\n");
          }
          system("pause");
      }
  }
  void Show(char *func) {
      system("cls");
      if(strcmp(func,"splitter")==0) {     ///Splitter
          printf("     id          姓名      c语言成绩      数学成绩      英语成绩     总分\n");
          printf("==========================================================================\n");
      } else if(strcmp(func,"teacher")==0) { ///Teacher;
          printf("┌───────────────────────────────────┐\n");
          printf("│           学生成绩管理系统        │\n");
          printf("│               教师端              │\n");
          printf("│───────────────────────────────────│\n");
          printf("│       添加学生信息          -->1  │\n");
          printf("│       浏览所有学生信息      -->2  │\n");
          printf("│       查询学生信息          -->3  │\n");
          printf("│       修改学生信息          -->4  │\n");
          printf("│       删除学生信息          -->5  │\n");
          printf("│       修改密码              -->6  │\n");
          printf("│       退出系统              -->7  │\n");
          printf("└───────────────────────────────────┘\n");
      } else if(strcmp(func,"student")==0) {
          printf("┌────────────────────────────────────┐\n");
          printf("│──────────学生成绩管理系统──────────│\n");
          printf("│────────────────────────────────────│\n");
          printf("│       查询自己成绩信息      -->1   │\n");
          printf("│       修改密码              -->2   │\n");
          printf("│       退出系统              -->3   │\n");
          printf("└────────────────────────────────────┘\n");
      } else if(strcmp(func,"Login")==0) {
          printf("┌────────────────────────────────────┐\n");
          printf("│──────────学生成绩管理系统──────────│\n");
          printf("│────────────────────────────────────│\n");
          printf("│请输入账号：                        │\n");
          printf("│────────────────────────────────────│\n");
          printf("│请输入密码：                        │ \n");
          printf("└────────────────────────────────────┘\n");
      } else if(strcmp(func,"Admin")==0) {
          printf("┌───────────────────────────────────┐\n");
          printf("│          学生成绩管理系统         │\n");
          printf("│              管理员端             │\n");
          printf("│───────────────────────────────────│\n");
          printf("│       添加教师账号          -->1  │\n");
          printf("│       删除教师账号          -->2  │\n");
          printf("│       退出系统              -->3  │\n");
          printf("│       重置系统              -->4  │\n");
          printf("└───────────────────────────────────┘\n");
      } else {      ///Load
          char loadR[] = {">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"};
          char loadL[] = {"<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"};
          const int leng = sizeof(loadR)/sizeof(char);
          char *ploadR[leng+5],*ploadL[leng+5];
          int i;
  
          printf("\n\n");
          for(i=0;i<leng;i++){
              ploadR[i] = &loadR[i];
              ploadL[i] = &loadL[i];
          }
          for(i=1;i <= leng; i++) {
              printf("\r%50s    Loading %3d%%    %-50s",ploadL[leng-i],i*2,ploadR[leng-i]);
              Sleep(40);
          }
      printf("\n");
      }
  }
  void Init() {                           ///重置系统
      printf("请注意,该操作将会清空系统内所有信息!\n");
      Sleep(1000);
      printf("1.执行\n2.不执行\n");
      int flag;
      scanf("%d",&flag);
      if(flag==1) {
          FILE *fin = fopen("student.txt","w");
          FILE *fout = fopen("accont.txt","w");
          fclose(fin);
          fclose(fout);
          printf("重置成功!\n");
          Sleep(1000);
          return;
      } else if(flag==2)
          return;
      else
          printf("输入有误,默认返回\n");
      Sleep(1000);
      return;
  }
  void Sort(Class* head) {        ///冒泡,q,p为交换数据的前一个节点
      Class* p = head,*q;
      while(p->next){
          q = p;
          while(q = q->next){
              if(q->next&& p->next->allScore > q->next->allScore){
                  Class *tmp = p->next;
                  p->next = q->next;
                  q->next = q->next->next;
                  p->next->next = tmp;
              }
          }
          p = p->next;
      }
  }