Error File Binary in C++

include <iostream>
include <conio.h>
include <fstream>
include <windows.h>
using namespace std;
struct BXH
{
    string NameGroup;
    int thang,thua,hoa;
    void nhap()
    {
        `cin.ignore();`
        `cout<<"Nhap Ten Doi: "; getline(cin,NameGroup);`
        `cout<<"So tran thang:"; cin>>thang;`
        `cout<<"So tran thua :"; cin>>thua;`
        `cout<<"So tran hoa :"; cin>>hoa;`
    }`
    void xuat()
    {
        `cout<<"Ten doi :"<<this->NameGroup<<endl;`
        `cout<<"So tran thang :"<<this->thang<<endl;`
        `cout<<"So tran thua :"<<this->thua<<endl;`
        `cout<<"So tran hoa :"<<this->hoa<<endl;`
    }
  `  int tinhDiem()
    {
        int diem = (thang*3 +hoa);
        return diem;
    }`
 `   operator= (BXH &bxh)
    {
        NameGroup = bxh.NameGroup;
        thang = bxh.thang;
        thua =  bxh.thua;
        hoa = bxh.hoa;
    }
    void friend swap1(BXH &a, BXH &b, BXH &temp)
    {
        temp = a;
        a= b;
        b= temp;
    }
};`
`int main()`
`{`
   ` BXH *bxh,temp,vd;`
    `int sodoi;`
    `cout<<"Nhap so doi bong "; cin>>sodoi;`
    `bxh = new BXH[sodoi];`
    `for(int i=0;i<sodoi;i++)`
   ` {
        (bxh+i)->nhap();
    }`
   ` for(int i=0;i<sodoi-1;i++)
    {
        for(int j=1;j<sodoi;j++)
            if((bxh+i)->tinhDiem() > ( bxh+j)->tinhDiem() )
            {
                swap1(*(bxh+i),*(bxh+j),temp);
            }
    }
    system("cls");
    ofstream ofs("File.dat",ios::binary|ios::out|ios::app);
    ofs.write(reinterpret_cast<char*>(bxh),sizeof(BXH));
    ofs.close();`

    ifstream ifs("File.dat",ios::binary|ios::in);
    ifs.read(reinterpret_cast<char*>(bxh),sizeof(BXH));

    while(!ifs.eof())
    {
        if(!ifs.eof())
            vd.xuat();
    }
    ifs.close();
    return 0;
}