xuanke4.c

C语言学生选课系统程序

#include <stdio.h>
#include <string.h>
#include <conio.h>
#define MAXSTU 30
/*定义课程结构***********************/
typedef struct cour{
  char name[40];/*课程名称*/
  int semester;/*开始学期*/
  int score;/*考试分数*/
  int value;/*所占学分*/
  int flag;/*课程标志：-1表示还有前继课程未修，0表示无前继课程，1表示可选择该课程，2表示已选择该课程，3表示该课程已通过*/
  char character[10];
  struct cour *before;
  struct cour *next;
}course;
/*定义学生信息结构**********************/
struct Student{
  char name[10];
  char num[9];
  int semester;
  int data[26*2];/*双数记录考试分数，单数记录课程标志*/
}*stu;
/*定义学生简单信息结构********************/
struct Stu{
  char name[30];
  char num[9];
}*Stu,*allstu[MAXSTU];
course all[26]=
  {{"Advanced Mathematics",1,0,5,0,"required"},
   {"College Physics",2,0,6,-1,"required"},
   {"Circuitry Analysis",1,0,3,0,"required"},
   {"Analogical Electronics",2,0,4,-1,"required"},
   {"Digital Electronics",3,0,4,-1,"required"},
   {"Principles of Microcomputer",4,0,6,-1,"required"},
   {"Programming with C Language",1,0,5,0,"required"},
   {"Visual C++ Programming",2,0,4,-1,"required"},
   {"Java Language Programming",3,0,4,-1,"required"},
   {"Discrete Mathematics",2,0,4,0,"required"},
   {"Data Structure",3,0,6,-1,"required"},
   {"Operating system",4,0,4,-1,"required"},
   {"Database Principles",5,0,5,-1,"required"},
   {"Software engineering",5,0,4,0,"required"},
   {"Assembly Language",4,0,4,0,"required"},
   {"Graph theory",6,0,3,0,"required"},
   {"College English",1,0,5,0,"required"},
   {"Compilation Method",5,0,4,0,"required"},
   {"Linear Algebra",2,0,3,0,"required"},
   {"Graduation Project",6,0,10,0,"required"},
   {"Network Technology",2,0,5,0,"elective"},
   {"Specialty English",3,0,4,0,"elective"},
   {"Set Theory",2,0,5,0,"elective"},
   {"Numeric Calculation",1,0,4,0,"elective"},
   {"Fundamentals of Law",1,0,3,0,"elective"},
   {"Intelligence robot",4,0,5,0,"elective"}};
/*初始界面显示***************************/
StartScr()
{
   printf("###############################################################################\n");
   printf("#######                       Welcome to Course System!                  ######\n");
   printf("###############################################################################\n");
   printf("#######   1.Login with Teacher       2.Login with Student      3.Exit    ######\n");
   printf("###############################################################################\n\n");
}
TeacherScr()
{
   printf("###############################################################################\n");
   printf("#######             Welcome to Course System!(Teacher Part)              ######\n");
   printf("###############################################################################\n");
   printf("####### 1.Creat user   2.Student   3.Change password    4.Back   5.Exit  ######\n");
   printf("###############################################################################\n\n");
}
TeacherScr2()
{
   printf("###############################################################################\n");
   printf("#######             Welcome to Course System!(Teacher Part 2)            ######\n");
   printf("###############################################################################\n");
   printf("#######  1.Give score         2.Student infor        3.Show course       ######\n");
   printf("#######  4.Special operation  5.Back                 6.Exit              ######\n");
   printf("###############################################################################\n\n");
}
TeacherScr3()
{
   printf("###############################################################################\n");
   printf("#######            Welcome to Course System!(Teacher Part 3)             ######\n");
   printf("###############################################################################\n");
   printf("####### 1.Give score          2.Semester operation    3.Select course    ######\n");
   printf("####### 4.Course could select 5.Back                  6.Exit             ######\n");
   printf("###############################################################################\n\n");
}

StudentScr()
{
   printf("###############################################################################\n");
   printf("#######             Welcome to Course System!(Student Part)              ######\n");
   printf("###############################################################################\n");
   printf("#######  1.Select course    2.Inquire score   3.Inquire credit hour      ######\n");
   printf("#######  4.Selected course  5.back            6.Exit                     ######\n");
   printf("###############################################################################\n\n");
}
/*将学生信息课程部分读入课程信息组*/
ReadInfo()
{
   int i;
   for(i=0;i<26;i++)
  {
     all[i].score=stu->data[(i+1)*2-2];
     all[i].flag=stu->data[(i+1)*2-1];
  }
}
/*将课程信息组写入学生信息课程部分*/
WriteInfo()
{
   int i;
   for(i=0;i<26;i++)
  {
     stu->data[(i+1)*2-2]=all[i].score;
     stu->data[(i+1)*2-1]=all[i].flag;
  }
}
/*输出可选课程*/
ShowCourToSelect()
{
 int i,j=0;
 printf("number        coursename              semester    credit hour  character\n");
 for(i=0;i<26;i++)
  {
    if((all[i].semester<=stu->semester&&(all[i].flag==0))||all[i].flag==1)
     {
          all[i].flag=1;
          j++;
          printf("  %-2d      %-30s  %d          %d          %-10s\n",i+1,all[i].name,all[i].semester,all[i].value,all[i].character);
     }
  }
  return j;
}
/*选课函数*/
Select(int i)
{
  switch(all[i].flag)
  {
    case 1:all[i].flag=2;printf("%s selected!\n",all[i-1].name);break;
    case 2:printf("Error!You have select the course before!\n");break;
    case 3:printf("Error!You have finish the course!\n");break;
    case 0:printf("Error!You can't select the course this semester.\n");break;
    case -1:printf("Error!Can't select!Doesn't finish former course.\n");break;
    default: printf("Flag error!\n");
  }
}
main(int argc,char *av[])
{
   FILE *fp;/*文件指针*/
   int key;/*记录操作数*/
   int i;/*循环计数*/
   int cournum;/*课程数目*/
   int selnum;/*选择课程数目*/
   int score;/*记录所输入成绩*/
   int x,y;/*记录位置*/
   char pass1[7],pass2[7];/*记录密码*/
   char back;/*记录返回操作数*/
   float getvalue=0,allvalue=0,allscore;
   char a[10],b[10]; /*记录学号及姓名*/
/*课程链接*/
  /***************关联课程1****************/
  all[0].before=NULL;all[0].next=&all[1];
  all[1].before=&all[0];all[1].next=NULL;
  /***************关联课程2****************/
  all[2].before=NULL;all[2].next=&all[3];
  all[3].before=&all[2];all[3].next=&all[4];
  all[4].before=&all[3];all[4].next=&all[5];
  all[5].before=&all[4];all[5].next=NULL;
  /***************关联课程2****************/
  all[6].before=NULL;all[6].next=&all[7];
  all[7].before=&all[6];all[7].next=&all[8];
  all[8].before=&all[4];all[8].next=NULL;
  /***************关联课程3****************/
  all[9].before=NULL;all[9].next=&all[10];
  all[10].before=&all[9];all[10].next=&all[11];
  all[11].before=&all[10];all[11].next=&all[12];
  all[12].before=&all[11];all[12].next=NULL;
  /***************无关联课程****************/
  for(i=13;i<26;i++)
  {
     all[i].before=NULL;all[i].next=NULL;
  }
  /******************课程连接结束*****************************/
START:
   StartScr();
   printf("    Please input operation number:");
   scanf("%d",&key);
   switch(key)
   {
     case 1:goto TEACHERPASS;
     case 2:goto STUDENTPASS;
     case 3:goto END;
     default: printf("Input error!\n");
     printf("Press any key to continue......\n");
     getch();
     clrscr();
     goto  START;
   }
TEACHERPASS:
/*密码登录*/
    printf("    Please input teacher password:");
   for(i=0;i<6;i++)
   {
       pass1[i]=getch();
       printf("*");
   }
   pass1[i]='\0';
   if((fp=fopen("password","r"))==NULL)
    {
      printf("\nSorry,can't find password file!\n");
      printf("Press any key to continue......\n");
      getch();
      goto START;
    }
   else fgets(pass2,7,fp);
   fclose(fp);
   if(strcmp(pass1,pass2)!=0)
   {
     printf("\nPassword error!\n");
     printf("Press any key to continue......\n");
     getch();
     clrscr();
     goto START;
   }
  else printf("Login with Teacher success!\n");
  printf("Press any key to continue......\n");
  clrscr();
  goto TEACHER;
/*进入教师首页*/
TEACHER:
  TeacherScr();
  printf("    Please input operation number:");
  scanf("%d",&key);
   switch(key)
   {
      case 1:goto CREAT;/*产生新用户*/
      case 2:goto STUPART;/*进入学生信息界面*/
      case 3:goto PASSWORD;
      case 4:goto BACK;
      case 5:goto END;
      default: printf("Input error!\n");
     printf("Press any key to continue......\n");
     getch();
     clrscr();
     goto  TEACHER;
   }
/*产生新用户*/CREAT:
   clrscr();
   TeacherScr();
    printf("##############                  CREAT NEW USER                   ##############\n");
   printf("Now you will creat a new user.\nPlease input studynumber:");
   scanf("%s",a);
   if(strlen(a)!=8)
   {
     printf("Studynumber input error!\n");
     printf("Press any key to continue......\n(Press 'B' to back teacher first section)\n");
     back=getch();
     if(back=='b'||back=='B')
       {
         clrscr();
         goto TEACHER;
       }
     else
     {
       clrscr();
       TeacherScr();
       goto CREAT;
     }
   }
   strcpy(av[1],a);
   fp=fopen(av[1],"r");
   if(fp!=NULL)
   {
     printf("Sorry,the user has existed!\n");
     printf("Press any key to continue......\n(Press 'B' to back teacher first section)\n");
     back=getch();
     if(back=='b'||back=='B')
       {
         clrscr();
         fclose(fp);
         goto TEACHER;
       }
      else
     {
       clrscr();
       TeacherScr();
       fclose(fp);
       goto CREAT;
     }
   }
   else fclose(fp);
   printf("Please input the name:");
   scanf("%s",b); /*********************/printf("b=%s\n",b);
   strcpy(stu->name,b);
   strcpy(stu->num,a);

   stu->semester=1;
   for(i=0;i<26*2;i++)
   {
     stu->data[i]=0;
   }

   /*将数据写入学生信息文件*/

   strcpy(av[1],a);
   if((fp=fopen(av[1],"w"))==NULL)
   {
     printf("Sorry,can't creat new user!\n");
     getch();
     fclose(fp);
     clrscr();
     goto TEACHER;
   }
   else
   {
     fwrite(stu,sizeof(struct Student),1,fp);
     fclose(fp);
   }
   printf("stu->name3:%s,stu->num3:%s\n",stu->name,stu->num);
   /*将简单学生信息数据写入所有学生信息文件*/
   strcpy(Stu->name,b);
   strcpy(Stu->num,a);
   printf("Stu->name:%s,Stu->num:%s\n",Stu->name,Stu->num);
   fp=fopen("allstudent","a");
   if(fp==NULL)
   {
     printf("Sorry,can't creat new user!\n");
     fclose(fp);
     getch();
     clrscr();
     goto TEACHER;
   }
   else
   {
     fwrite(Stu,sizeof(struct Stu),1,fp);
     fclose(fp);
     printf("Creat success!\n");
   }
   printf("Press any key to continue......\n(Press 'B' to back teacher first section)\n");
     back=getch();
     if(back=='b'||back=='B')
       {
         clrscr();
         fclose(fp);
         goto TEACHER;
       }
      else
     {
       clrscr();
       TeacherScr();
       fclose(fp);
       goto CREAT;
     }
/*进入学生信息界面*/
STUPART:
  clrscr();
  TeacherScr2();
  printf("    Please input operation number:");
  scanf("%d",&key);
   switch(key)
   {
     case 1:goto GIVESCORE;/*输入学生成绩*/
     case 2:goto SHOWSTUINFO; /*显示学生信息*/
     case 3:goto ALLSTU;/*显示所有学生*/
     case 4:goto SPECIALPASS;/**/
     case 5:clrscr(); goto  TEACHER;
     case 6:goto END;
     default: printf("Input error!\n");
              printf("Press any key to continue......\n");
              getch();
              clrscr();
              goto  STUPART;
   }
/*输入学生成绩*/GIVESCORE:
  /*输入学号*/
  printf("    Please input student studynumber(press 5 back,press 6 exist):\n    ");
  scanf("%s",a);
  if(a[0]=='5')
  {
      clrscr();
   goto  TEACHER;
  }
  else if(a[0]=='6') goto END;
  strcpy(av[1],a);
  if((fp=fopen(av[1],"r"))==NULL)
  {
    printf("Sorry,no account!");
    getch();
    clrscr();
    goto STUPART;
  }
  else  fread(stu,sizeof(struct Student),1,fp);
  ReadInfo();
  fclose(fp);
  clrscr();
  TeacherScr2();
  printf("#######                     STUDYNUMBER:  %-9s                      ######\n",stu->num);
  printf("number        coursename              credit hour   character    score\n");
  allvalue=0;
  getvalue=0;
  for(i=0;i<26;i++)
  {

    if(all[i].flag==2)
    {
      allvalue=all[i].value+allvalue;
      printf("  %-2d      %-30s    %d        %-10s   ",i+1,all[i].name,all[i].value,all[i].character);
      GET:
      x=wherex();
      y=wherey();
      scanf("%d",&score);
      if(score>=0&&score<=100)
      {
        all[i].score=score;
          if(all[i].score>=60)
        {
          all[i].flag=3;
          getvalue=getvalue+all[i].value;
          if (all[i].next!=NULL)
            all[i].next->flag=0;
        }
        else  all[i].flag=1;
      }
      else
      {
        printf("Score input error!");
        printf("Press any key to continue...(Press 'B' back teacher part 2)");
        back=getch();
        if(back=='b'||back=='B')
         {
            goto SPECIAL;
         }
        else
        {
           gotoxy(x,y);
           printf("\n");
           clreol();
           gotoxy(x,y);
           clreol();
           goto STUPART;
        }

      }
    }
  }
  if(allvalue==0)
  {
    printf("Error!No course selected!\n");
    printf("Press any key to continue......\n");
    getch();
    clrscr();
    goto STUPART;
  }
  else if((getvalue/allvalue)>0.6&&getvalue>=10)/*学分修够选课的60%,并且本学期得到10个学分可以进入下一学期*/
  {
     stu->semester++;
     printf("Get enough credit hour,goto semester %d.\n",stu->semester);
     printf("Press any key to continue......\n");
     getch();
  }
  else
  {
    printf("Didn't get enough credit hour,stay on semester %d.\n",stu->semester);
    printf("Press any key to continue......\n");
     getch();
  }
  WriteInfo();
  strcpy(av[1],a);
  if((fp=fopen(av[1],"w"))==NULL)
  {
    printf("Open file error!\n");
    getch();
    clrscr();
    goto STUPART;
  }
  else  fwrite(stu,sizeof(struct Student),1,fp);
  fclose(fp);
  clrscr();
  goto STUPART;
  /*显示学生信息*/ SHOWSTUINFO:
   clrscr();
   TeacherScr2();
   printf("Please input student studynumber(press 5 back,press 6 exist):\n");
   scanf("%s",a);
  if(a[0]=='5')
  {
      clrscr();
   goto  TEACHER;
  }
  else if(a[0]=='6') goto END;
  strcpy(av[1],a);
  if((fp=fopen(av[1],"r"))==NULL)
  {
    printf("Sorry,no account!");
    getch();
    clrscr();
    goto STUPART;
  }
  else  fread(stu,sizeof(struct Student),1,fp);
  ReadInfo();
  fclose(fp);
  clrscr();
  TeacherScr2();
  printf("##############                SHOW STUDENT INFORMATION           ##############\n");
  printf("#######                     STUDYNUMBER:  %-9s                      ######\n",stu->num);
  getvalue=0;
  allvalue=0;
  allscore=0;
  key=0;
  cournum=0;
  selnum=0;
  printf("number        coursename              credit hour   character    score\n");
  for(i=0;i<26;i++)
  {
    if(all[i].score>=60)
      {
        getvalue=getvalue+all[i].value;
        cournum++;
      }
    if(all[i].score!=0)
    {
      allscore=allscore+all[i].score*all[i].value;
      allvalue=allvalue+all[i].value;
      key++;
      printf("  %-2d      %-30s    %d        %-10s    %d \n",i+1,all[i].name,all[i].value,all[i].character,all[i].score);
    }
    if(all[i].flag==2)
       {
         selnum++;