#include <stdio.h>
#include <string.h>
 #include <conio.h>  


struct yonghu {                                                     /*个人注册信息*/  
char name[8];
char sex[4];
char cla[20];
 }stud, student[100];
 void save()
 { FILE *ip;   
if((ip = fopen("student3.txt","a+")) == NULL)
{   printf("不能打开这个文件\n");   return;  
}  
if(fwrite(&stud,sizeof(struct yonghu),1,ip) != 1)  

 printf("信息写入错误!"); fprintf(ip,"\n"); fclose(ip);     
 }  
 void du()
{
 FILE *fp; int i=0,w;
if((fp = fopen("student3.txt","r+")) == NULL)
{   printf("不能打开这个文件\n");   return;
 }
  while(!fp) {
  fread(&student[i],sizeof(struct yonghu),1,fp); i++; }
 }
 for (d = 0; d <= 14; d++)
 {  printf("%s\t%s\t%s",student[d].name[8], student[d].sex[4], student[d].cla[20]);
printf("\n");
 }   
}  
int main()
{  
int d;
 scanf("%s%s%s", stud.name, stud.sex, stud.cla);  
 save();   
du();  
}