Struct don gian

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

void main()
{
     typedef struct {
     char hoten[30];
     float dtb;
     } sv;
     sv sinhvien[10],tg;
     int i,n,j;
     float diem;
     //clrscr();
     printf("nhap so sv");
     scanf("%d",&n);
     for (i=1;i<=n;i++)
     {
      printf("\nnhap sinh vien thu %d:  ",i);
      printf("\nnhap ho ten: ");
      //scanf("%s",&sinhvien[i].hoten);
      fflush(stdin);
      gets(&sinhvien[i].hoten);
      printf("\nnhap diem trung binh: ")  ;
      scanf("%f",&diem);
      sinhvien[i].dtb=diem;
     }
     for (i=1;i<=n;i++)
    for (j=i+1;j<=n;j++)
        if (sinhvien[j].dtb < sinhvien[i].dtb)
        {
        tg=sinhvien[j];
        sinhvien[j]=sinhvien[i];
        sinhvien[i]=tg;
        }
     printf("\nin ra danh sach sinh vien: ");
     printf("\n\t ho ten\t\tdiem trung binh");
     for (i=1; i<=n;i++)
      printf("\n\t%s\t  %.2f",sinhvien[i].hoten,sinhvien[i].dtb);
     getch();
}