study notes for fstream

print a file backward

int main(){
  Student S;
  fin.seekg(0); //back to the first
  int i=1;
  while(!fin.fail()){
    fin.seekg(sizeof(Student*(-1)), ios::end);
    if(!fin.fail()){
       fin.read((char*)&S, sizeof(Student));
       cout << s << endl;
       i++;
    }
  }
}