#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 3.1415926535void 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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