#include "stdio.h"
#define STUDENT struct stu_str
struct stu_str{
  char num[10];
  char name[20];
  float score[4];
 }
#include "stru.h"
main()
{
 char in_ch,filname[20];
 while(1)
 {
  clrscr();
  printf("1.Iput students records.\n");
  printf("2.Show students records.\n");
  printf("3.Modify students records.\n");
  printf("4.Append student records.\n");
  printf(" average.\n");
  printf("6.Sort.\n");
  printf("0.Exit.\n");
  if((in_ch=getchar())=='0')
  {
   printf("Good bye!\n");
   getch();
   break;
  }
   switch(in_ch)
   {
    case 48:break;
    case 49:create();break;
    case 50:printf("\nPlease input filename:");
        scanf("%s",filename);
        show(filename);
        break;
    case 51:modify();break;
    case 52:append();break;
    case 53:compute();break;
    case 54:sort();break;
   }
  }
 }
  show(char filename[])
  {
   FILE * fp;
   STUDENT stud;
   int i,stu_c;
   if((fp=fopen(filename,"rb"))==NULL)
   {
    printf("File open error!\n");
    exit(1);
    }
  clrscr();
  printf("|Number|Name|Compute|Math|Eenglish|Average|\n");
  printf("               \n");
  while(1)
  {
   if(fread(&stud,sizeof(STUDENT),1,fp))
   printf("|%8s|%15s|%8.1f|%8.1f|%8.1f|%8.1f|\n",stud.num,stud.name,stud.score[0],stud.score[1],stud.score[2],sted.score[3]);
   else
    break;
    }
    printf("         \n");
    fcose(fp);
    printf("Press any continue...\n");
    getch();
    }