#include <conio.h>
#include <graphics.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <dos.h>
#define  N  10
#define  PAGE 2
#define  PRINT1  printf("\n   姓名    性别    年龄    系别    专业    班级\n")
#define  PRINT2  printf("\n %6s%8s%8d%8s%8s%8d",student[i].name,student[i].sex,student[i].age,student[i].department,student[i].profession,student[i].classes)
#define  PRINT3  printf("\n   学号    职务    成                 绩    出生日期    地址    电话\n")
#define  PRINT4  printf("\n %6d%6s%4d%2d%2d%2d%2d-%2d-%8d%6s%8d\n",student[i].num,student[i].plants,student[i].exam.chinese,student[i].exam.math,student[i].exam.english,aver[i],student[i].birthday.year,student[i].birthday.month,student[i].birthday.date,student[i].add,student[i].telephone)
int sum;
float aver[20];              /*记录学生的人数*/
struct data
{ int year;
  int month;
  int date;
};
struct score
{ int chinese;
  int math;
  int english;

};

struct student_type
{ char name[20];

  char sex[10];
  int age;
  char department[20]; /*系别*/
  char profession[20]; /*专业*/
  int classes;
  int num;
  char plants[20];
  struct score exam;
  struct data birthday;
  char add[20];
  double telephone;
}student[N];


/*保存信息*/
save_message(int sum)
{ FILE *fp;
  int i;
  if((fp=fopen("student.txt"," wb"))==NULL)
  { printf("读信息错误!\n");
    return;
  }
  for(i=0;i<=sum;i++)
   if(fwrite(&student[i],sizeof(struct student_type),1,fp)!=1)
     printf("写信息错误!\n");
fclose(fp);
}


/*输入信息*/
input_message()
{ int i=0;
  char choice;
  int flag;
aver[i]=(float)(student[i].exam.chinese+student[i].exam.math+student[i].exam.english)/3.0;
  window(1,1,80,25);
  clrscr();
  printf("\n\n           输入学生信息(最多为 %d个) \n",N);
  printf("           _________________________________");
  do
  {
    printf("\n                   第%d个的学生信息",i+1 );
    printf("\n               学生姓名:");
    scanf ("%s",student[i].name);
    printf("               学生性别:");
    scanf ("%s",student[i].sex);
    printf("               学生年龄:");
    scanf ("%d",&student[i].age);
    printf("               学生系别:");
    scanf ("%s",&student[i].department);
    printf("               学生专业:");
    scanf ("%s",&student[i].profession);
    printf("               学生班级:");
    scanf ("%d",&student[i].classes);
    printf("               学生学号:");
    scanf ("%d",&student[i].num);
    printf("               学生职务:");
    scanf ("%s",&student[i].plants);
    printf("               学生成绩:");
    printf("语文:");
    scanf ("%d",&student[i].exam.chinese);
    printf("     数学:");
    scanf ("%d",&student[i].exam.math);
    printf("     英语:");
    scanf ("%d",&student[i].exam.english);
    printf("   平均成绩:%f",aver);
    printf("               出生日期(yyyy-mm-dd): ");
    scanf("%d-%d-%d",&student[i].birthday.year,&student[i].birthday.month,&student[i].birthday.date);
    printf("               家庭地址: ");
    scanf("%s",student[i].add);
    printf("               学生电话:");
    scanf ("%d",&student[i].telephone);
    printf("\n您还想继续吗?(Y/N) ");
    choice=getch();
    if(choice=='y'||choice=='Y')
    { printf("\n                  继续!\n");
      clrscr();
      i++;
      flag=1;

    }
    else flag=0;
  }while(flag==1);
  printf("\n                 第%d 个学生的信息已经输入完毕!\n",i+1 );
  sum=i+1;
  printf("\n                  按任意键返回主菜单!");
  bioskey(0);
}


/*读取信息*/
read_message()
{ FILE *fp;
  int i=0;
window(1,1,80,25);
  if((fp=fopen("student.txt","rb"))==NULL)
  { printf("\n\n                *****现在,还没有任何学生的信息, 按任意键返回主菜单!*****\n");
    return 0;
  }
  while(feof(fp)!=1)
  { fread(&student[i],sizeof(struct student_type),1,fp);
    if(student[i].num==0)   break;
    else i++;
  }
  fclose(fp);
  return(i);
}
output_message()
{ int i=0,page=1;
  int j=0;
  window(1,1,80,25);
  clrscr();
  printf("\n\n       ----学生管理信息----      第%d页\n\n", page);
  printf("     ---------------------------------");
do
  { if(student[i].num!=0)
    { j++;
      if(j%PAGE!=0)
      { PRINT1;
        PRINT2;
        PRINT3;
        PRINT4;
      }
    else
    { PRINT1;
      PRINT2;
      PRINT3;
      PRINT4;
      if(student[i+1].num!=0)
      { printf("按任意键继续!");
        bioskey(0);
        clrscr();
        printf("\n\n    --学生管理信息--   第%d页\n\n ",++page);
        printf("  ----------------------------");
        PRINT1;
      }
      }
    }
    i++;
   }while(student[i].num!=0);
   printf("按任意键退出!");
   bioskey(0);
}
insert_message()
{ int i=sum;
  int flag=0;
  char choice;
  aver[i]=(float)(student[i].exam.chinese+student[i].exam.math+student[i].exam.english)/3.0;
  clrscr();
  printf("\n\n                           插入学生信息\n");
do
  { student[i].num=++sum;
    printf("\n                 新生学号: %d ",student[i].num);
    printf("\n                 姓名:");
    scanf ("%s",&student[i].name);
    printf("\n                 性别:");
    scanf ("%s",&student[i].sex);
    printf("\n                 年龄:");
    scanf ("%d",&student[i].age);
    printf("\n                 系别:");
    scanf ("%s",&student[i].department);
    printf("\n                 专业:");
    scanf ("%s",&student[i].profession);
    printf("\n                 班级:");
    scanf ("%d",&student[i].classes);
    printf("\n                 学号:");
    scanf ("%d",&student[i].num);
    printf("\n                 职务:");
    scanf ("%s",&student[i].plants);
    printf("\n                 学生成绩:");
    printf("语文:");
    scanf ("%d",&student[i].exam.chinese);
    printf("      数学:");
    scanf ("%d",&student[i].exam.math);
    printf("      英语:");
    scanf ("%d",&student[i].exam.english);
    printf("\n                 平均成绩:%f",aver);
    printf("\n                 出生日期(yyyy-mm-dd):");
    scanf ("%d-%d-%d",&student[i].birthday.year,&student[i].birthday.month,&student[i].birthday.date);
    printf("\n                 电话:");
    scanf ("%d", &student[i].telephone);
    printf("\n                 地址:");
    scanf ("%s",student[i].add);
    printf("\n                您还想继续吗?(Y/N)");
    choice=getch();
    if(choice=='y'||choice=='Y')
    { printf("\n        继续!\n");
      i++;
      flag=1;
    }
    else  flag=0;
   }while(flag==1);
   printf("\n                  按任意键退出!");
   bioskey(0);
}