#include"math.h"
#include"graphics.h"
#include <stdlib.h>
#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <conio.h>
#define N 10
#define PI 3.1415926535
void updateInfo();
void freeInfo();
void saveInfo();
void show_file();         /*函数声明*/
char exitSys();
void sortInfo();
void update();
void addInfo();
void deleInfo();
void showInfo();

typedef struct node      /*定义结构体*/
{
    char sex[9];
    int age;
    int flat;
    int num;
    char name[15];
    int money;
    int english;
    int math;
    int computer;
    int average;
    struct node *next;
}student_info;

/*主函数*/
void main()
{
   char menu();
    char ch,mark;
    student_info *p;
   int dr=VGA,dm=VGAHI;        /*指定图形显示设备*/
   initgraph(&dr,&dm,"d:\\language\\tc20\\bgi");      /*初始化图形系统*/
    head();
    getch();
    closegraph();             /*关闭图形系统,返回字符模式*/


    p=(student_info *)malloc(sizeof(student_info));
    p->next=NULL;



while((ch=menu())!=0)
{
switch(ch)
{
    case '0':
           {
              printf("Input error!Press any key contiune...");
              getch();
              break;
           }
    case '1':
           {
              showInfo(p);
              printf("\nPress any key to continue!...");
              getch();
              break;
           }
    case '2':
           {
              addInfo(p);
              printf("\nPress any key to continue!...");
              getch();
              break;
           }
    case '3':
           {
              deleInfo(p);
              printf("\nPress any key to continue!...");
              getch();
              break;
           }
    case '4':
           {
              sortInfo(p);
              printf("\nPress any key to contiue!...");
              getch();
              break;
           }
    case '5':
           {
              updateInfo(p);
              printf("\nPress any key to contiue!...");
              break;
           }
    case '6':
           {
              saveInfo(p);
              printf("\nPress any key to contiue!...");
              getch();
              break;
           }
    case '7':
           {
              mark=exitSys();
              if(mark=='1')
                 {
                   saveInfo(p);
                   freeInfo(p);
                   exit(1);
                 }
              else break;
            }
  }
   clrscr();
  }
show_file(p);
}
/*学生的基本情况显示出来*/
void showInfo(student_info *p)
{
   student_info *stu;
   stu=p->next;
   if(stu==NULL)
   {
      printf("The List is empty!...");
      return;
   }
   while(stu)
   {
      printf("**********\n");
      printf("Num:%d\nName:%s\nMoney:%d\nEnglish:%d\nMath:%d\nComputer:%d\nAverage:%d\nSex:%s\nAge:%d\nFlat:%d\n",
              stu->num,stu->name,stu->money,stu->english,stu->math,stu->computer,stu->average,stu->sex,stu->age,stu->flat);
      printf("**********\n");
      stu=stu->next;
   }
}
/*添加一个学生的情况*/
void addInfo(student_info *p)
{
   student_info*stu,*t;
   stu=(student_info *)malloc(sizeof(student_info));
   /*数据录入*/
   printf("Please enter the information of the student:");
   printf("\nStudent--num:");scanf("%d",&stu->num);
   printf("\nStudent--name:");scanf("%s",stu->name);
   printf("\nStudent--money:");scanf("%d",&stu->money);
   printf("\nStudent--english:");scanf("%d",&stu->english);
   printf("\nStudent--math:");scanf("%d",&stu->math);
   printf("\nStudent--computer:");scanf("%d",&stu->computer);
   printf("\nStudent--sex:(man/woman)");scanf("%s",stu->sex);
   printf("\nStudent--age:");scanf("%d",&stu->age);
   printf("\nStudent--flat:");scanf("%d",&stu->flat);
   stu->average=(stu->english+stu->math+stu->computer)/3;
   t=p->next;
   if(t==NULL)
     {
       p->next=stu;
       stu->next=NULL;
     }
   else
     {
       p->next=stu;
       stu->next=t;
     }
}
/*删除一个学生的资料(按学号)*/
void deleInfo(student_info *p)
{
   student_info *stu,*t;
   int i,mark=0;
   char ch;
   t=p;
   stu=t->next;
   if(stu==NULL)
     {
        printf("The List is empty!...");
        return;
     }
   printf("Please enter the num of the student:\n");
   scanf("%d",&i);
   while(stu)
   {
      if(stu->num==i)
        {
           printf("Really delet it?(Y or N):\n");    /*是否删除学生资料*/
           ch=getch();
           if(ch=='Y'||ch=='y')
           {
              printf("Wait......\n");
              t->next=stu->next;
              free(stu);
              mark=1;
              printf("Success delet the student's information!");
           }
           else
             return;
         }
      else
        {
           t=t->next;
           stu=stu->next;
        }
    }
    if(mark==0)
      printf("The student of this num is not exit!");
}


/*排序并显示学生的平均成绩*/
void sortInfo(student_info *p)
{
   int i=1;
   student_info *stu,*t1,*t2;
   stu=p;
   if(stu->next==NULL)
   {
      printf("There is no student's information!");
      return;
   }
   t1=stu->next;
   t2=t1->next;
   while(t1)
   {
      while(t2)
       {
          if(t1->average<t2->average)            /*用链表排序*/
          {
             stu->next=t2;
             t1->next=t2->next;
             t2->next=t1;
          }
          t2=t2->next;
       }
       t1=t1->next;
       stu=stu->next;
   }
   stu=p->next;
   while(stu)
   {
      printf("The NO.%d is :\nNum:%d\nName:%s\nAverage:%d\n",i,stu->num,stu->name,stu->average);   /*显示信息*/
      printf("--------");
      stu=stu->next;
      i++;
   }
}
/*保存整个链表信息到文件中*/
void saveInfo (student_info *p)
{
  student_info *stu;
  FILE *fp;
  stu=p->next;
  if(stu==NULL)
  {
    printf("The List is empty!");
    return;

  }
  fp=fopen("student.txt","wt");
  if(fp==NULL)
  {
    printf("The file open error!");
    return;
  }
  if(stu==NULL)
  {
    printf("The list is empty!");
    fputc('#',fp);
    fclose(fp);
    return;
  }
  printf("Wait......\n");
  while(stu)
  {
    fputc('*',fp);
    fprintf(fp,"%d\n%s\n%d\n%d\n%d\n%d\n%d\n%c\n%d\n%d\n",stu->num,stu->name,stu->money,
  stu->english,stu->math,stu->computer,stu->average,stu->sex,stu->age,stu->flat);
    stu=stu->next;
  }
  fputc('#',fp);
  fclose(fp);
  printf("Success to save the file!\n");
}

/*释放整个链表*/
void freeInfo(student_info *p)
{
   student_info *stu,*t;
   stu=p->next;
   while(stu)
   {
      t=stu;
      stu=stu->next;
      free(t);
   }
   free(p);
}

/*函数从文件中调数据上来*/
void show_file(student_info *stu)
{
   FILE *fp;
   student_info *p,*q;
   char ch;
   int i=0;
   q=stu;
   fp=fopen("student.txt","r");
   if(fp==NULL)
   {
      printf("File error!\npress any key to exit!...");
      getch();
      exit(1);
   }
   ch=fgetc(fp);
   while(ch!='#')
   {
      p=(student_info*)malloc(sizeof(student_info));
      fscanf(fp,"%d\n%s\n%d\n%d\n%d\n%d\n%d\n%c\n%d\n%d\n",&p->num,p->name,&p->money,
      &p->english,&p->math,&p->computer,&p->average,&p->sex,&p->age,&p->flat);
      q->next=p;
      i++;
      q=p;
      p++;
      ch=fgetc(fp);
   }
   if(i==0)
   {
      printf("The file is empty!\npress any key to continue...");
      getch();
      return;
   }
   else
   {
      q->next=NULL;
      printf("There is %d students' information!\npress any key...",i);
      getch();
      return;
   }
}

/*退出整个系统*/
char exitSys()
{
   char ch;
   printf("Quit the system?(Y or N):");
   ch=getchar();
   if(ch=='Y'||ch=='y')
      return '1';
   else
      return '0';
}
/*程序界面*/
char menu()
{
   int color=5;
   char ch;
   textcolor(color);
    textcolor(128+5);
    cprintf("            \n\n\n\n\n****WELLCOME to NM\'s Students\' Management!***\n\r");

    color=9;
   textcolor(color);

   cprintf("              Students' Information Management(v1.0)  \n\r");
   printf("                                           \n\r");
   color=10;
   textcolor(color);

   cprintf( "              *****************************************  \n\r");         /*按颜色输出*/
   printf( "              |                                       |  \n\r");
   color=2;
   textcolor(color);

   cprintf("              |   1.Show the students' information    |  \n\r");
   color=3;
   textcolor(color);
   cprintf("              |   2.Add a new student's information   |  \n\r");
   color=4;
   textcolor(color);

   cprintf("              |   3.Delet a student's information(num)|  \n\r");
   color=5;
   textcolor(color);

   cprintf("              |   4.Show the average marks of student |  \n\r");
   color=6;
   textcolor(color);

   cprintf("              |   5. Update a student's information   |  \n\r");
   color=7;
   textcolor(color);

   cprintf("              |   6.Save the students' information    |  \n\r");
   color=8;
   textcolor(color);

   cprintf("              |   7.Quit the system                   |  \n\r");
   printf("              |                                       |  \n\r");
    color=10;
   textcolor(color);

   cprintf( "              *****************************************  \n\r");
   color=9;
   textcolor(color);

   cprintf("                   PLEASE ENTER THE NUMBER(1--7):\n\r");


   ch=getch();
   if(ch!='1'&&ch!='2'&&ch!='3'&&ch!='4'&&ch!='5'&&ch!='6'&&ch!='7')
      return '0';
   else
      return ch;
}

/*更新一个学生的基本资料*/
void update(student_info *p)
{
    student_info *stu;
    char ch;
    stu=p;
    clrscr();
    printf("What item do you want to update:\n");
    printf("1.num||2.name||3.money||4.english||5.math||6.computer||7.sex||8.age||9.flat(1--9)\n(End with 0)\n");
       while ((ch=getch())!='0')
    {
      switch(ch)
      {
        case '1':
              {
                printf("Please enter the new num:\n");
                scanf("%d",&stu->num);
                printf("What item do you want to update:\n");
                break;
              }
        case '2':
              {
                printf("Please enter the new name:\n");
                scanf("%s",stu->name);
                printf("What item do you want to update:\n");
                break;
              }
        case '3':
              {
                printf("Please enter the new money:\n");
                scanf("%d",&stu->money);
                printf("What item do you want to update:\n");
                break;

              }
        case '4':
              {
                printf("Please enter the new english:\n");
                scanf("%d",&stu->english);
                printf("What item do you want to update:\n");
                break;
              }
        case '5':
              {
                printf("Please enter the new math:\n");
                scanf("%d",&stu->math);
                printf("What item do you want to update:\n");
                break;
              }
        case '6':
              {
                printf("Please enter the new computer:\n");
                scanf("%d",&stu->computer);
                printf("What item do you want to update:\n");
                break;
              }
        case '7':
             {
                 printf("Please enter the new sex:(man/woman)\n");
                 scanf("%s",stu->sex);
                 printf("What item do you want to update:\n");
                 break;
             }
        case '8':
            {
                printf("Please enter the new age:\n");
                scanf("%d",&stu->age);
                printf("What item do you want to update:\n");
                break;
            }
        case '9':
            {
                printf("Please enter the new flat:\n");
                scanf("%d",&stu->flat);
                printf("What item do you want to update:\n");
                break;
            }


        default:
              {
                printf("Your input is error!");
                printf("What item do you want to update:\n");
                break;
              }
      }
    }
return;
}
void updateInfo(student_info *p)
{
    student_info * stu,*t;
    int i,mark=0;
    t=p;
    stu=t->next;
    if(stu==NULL)
      {
         printf("The List is empty!...");
         return;
      }
    printf("Please enter the num of the student:\n");
    scanf("%d",&i);
    while(stu)
    {
       if(stu->num==i)
         {
            update(stu);
            mark=1;
            return;
         }
       else
         {
            t=t->next;
            stu=stu->next;
         }
    }
    if(mark==0)
       printf("The student of this num is not exit!");

}
/*等待界面*/
head(void)
{
  int dr=VGA,dm=VGAHI;
  double a=0,b;
  int x0=340,y0=240,radius=100,j,x1,y1;
int i,x=295,y=50;
initgraph(&dr,&dm,"");
setbkcolor(0);
sleep(3);
for(i=0;i<8;i++)
{setcolor(3+i);
  x=x-15;                                    /*动态字符"HELLO*/
  y=y+15;
  settextstyle(1,0,i);
  cleardevice();
  outtextxy(x,y,"HELLO!");
  delay(10000000000000000);delay(100000000000);delay(100000000000000);delay(10000000000000);
}
x=295;y=50;
for(i=0;i<9;i++)
{
    setcolor(3+i);
    x=x+15;
    y=y+15;
setlinestyle(0,0,0);
  for(j=0;j<6;j++,a+=60)
  {                                                   /*自变颜色的图案*/
    b=a*PI/180;
    x1=x0+radius*cos(b);
    y1=y0+radius*sin(b);
    arc(x1,y1,120-i*60,240-i*60,radius);
  }

setcolor(LIGHTMAGENTA);
  rectangle(20,20,600,440);
  rectangle(30,30,590,430);
  settextstyle(3,HORIZ_DIR,5);
  outtextxy(200,250,"welcome");
setcolor(CYAN);
  outtextxy(80,350,"press any key to enter!");


}
}

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