/*CH13_7*/
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
struct stu
{
   char name[10];
   int num;
   int age;
   char addr[15];
}boya[2],boyb[2],*pp,*qq;

main()
{
   FILE *fp;
   char ch;
   int i;
   pp=boya;
   qq=boyb;
   if((fp=fopen("stu_list","wb+"))==NULL)
   {
      printf("Cannot open file strike any key exit!");
      getch();
      exit(1);
   }
   printf("\ninput data\n");
   for(i=0;i<2;i++,pp++)
      scanf("%s%d%d%s",pp->name,&pp->num,&pp->age,pp->addr);
   pp=boya;
   for(i=0;i<2;i++,pp++)
      fprintf(fp,"%s %d %d %s\n",pp->name,pp->num,pp->age,pp->addr);
   rewind(fp);
   for(i=0;i<2;i++,qq++)
      fscanf(fp,"%s %d %d %s\n",qq->name,&qq->num,&qq->age,qq->addr);
   printf("\n\nname\tnumber   age    addr\n");
   qq=boyb;
   for(i=0;i<2;i++,qq++)
      printf("%s\t%5d %7d %s\n",qq->name,qq->num, qq->age,qq->addr);
   fclose(fp);
}