Nhập FILE- C

#define _CRT_SECURE_NO_WARNINGS 0
#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>


struct SV
{
        char HoTen[30];
        int Diem;
};

void nhap1SV(SV &SinhVien)
{
        printf("Nhap vao ten SV: ");
        gets(SinhVien.HoTen);
        srand((unsigned) time(NULL));
        SinhVien.Diem=rand()%11;
}
void luuDanhSach(SV SinhVien, FILE* fp)
{

        if (fp!=NULL)
        {
                fprintf(fp,"%s  %i\n",SinhVien.HoTen, SinhVien.Diem);
        }
}

void main()
{
        SV DanhSachSV[3];
        FILE *fp=fopen("DanhSachSV.txt","wt");
        for (int i=0; i<3; i++)
        {
                nhap1SV(DanhSachSV[i]);
                luuDanhSach(DanhSachSV[i],fp);
        }
        fclose(fp);
}