help- unable to write and read objects into file.

this is my code:

#include<fstream.h>
#include<conio.h>
#include<stdio.h>
#include<string.h>
struct _date
{
 int dd,mm,yy;
};
struct _time
{
 int hour,min;
};
class Train
{
 private:
 int trainno;
 char from[20],to[20],station1[20];
 _date ddate,s1date,adate;
 _time dtime,s1dtime,s1atime,atime;
 int firstavail,secondavail;
 float firstamt,secondamt;
 public:
 void changeschedule();
 void display();
 int enquiry(char *f,char *t);
 int enquiry(int tno);
};
void Train::changeschedule()
{
 cout<<"\nEnter details: ";
 cout<<"\nTrain number: ";
 cin>>trainno;
 cout<<"From: ";
 gets(from);
 cout<<"To: ";
 gets(to);
 cout<<"Station 1: ";
 gets(station1);
 cout<<"Date of departure from source station: ";
 cin>>ddate.dd>>ddate.mm>>ddate.yy;
 cout<<"Date of arrival at station 1: ";
 cin>>s1date.dd>>s1date.mm>>s1date.yy;
 cout<<"\nDate of arrival at destination station: ";
 cin>>adate.dd>>adate.mm>>adate.yy;
 cout<<"Time of departure from source station: ";
 cin>>dtime.hour>>dtime.min;
 cout<<"Time of arrival at station 1: ";
 cin>>s1atime.hour>>s1atime.min;
 cout<<"Time of departure from station 1: ";
 cin>>s1dtime.hour>>s1dtime.min;
 cout<<"Time of arrival: ";
 cin>>atime.hour>>atime.min;
 cout<<"First class seats available: ";
 cin>>firstavail;
 cout<<"Second class seats available: ";
 cin>>secondavail;
 cout<<"Cost of first class ticket: ";
 cin>>firstamt;
 cout<<"Cost of second class ticket: ";
 cin>>secondamt;
}
void Train::display()
{
 cout<<"\nTrain no: "<<trainno
     <<"\nFrom: "<<from
     <<"\nTo: "<<to
     <<"\nStation 1: "<<station1
     <<"\nDate of departure from source station: "
     <<ddate.dd<<"|"<<ddate.mm<<"|"<<ddate.yy
     <<"\nDate of arrival at station 1: "
     <<s1date.dd<<"|"<<s1date.mm<<"|"<<s1date.yy
     <<"\nDate of arrival at destination station: "
     <<adate.dd<<"|"<<adate.mm<<"|"<<adate.yy
     <<"\nTime of departure from source station: "
     <<dtime.hour<<"."<<dtime.min
     <<"\nTime of arrival at station 1: "
     <<s1atime.hour<<s1atime.min
     <<"\nTime of departure from station 1: "
     <<s1dtime.hour<<s1dtime.min
     <<"\nTime of arrival at destination station: "
     <<atime.hour<<"."<<atime.min
     <<"\nFirst class seats available: "<<firstavail
     <<"\nSecond class seats available: "<<secondavail
     <<"\nFirst class seat amount: "<<firstamt
     <<"\nSecond class seat amt: "<<secondamt;
}
int Train::enquiry(char *f,char *t)
{
 if((!strcmp(f,this->from)&&!strcmp(t,this->to))||(!strcmp(f,this->from)
    &&!strcmp(t,this->station1))||(!strcmp(f,this->station1)
    &&!strcmp(t,this->to)))
 return 1;
 return 0;
}
int Train::enquiry(int tno)
{
 if(this->trainno==tno)
 return 1;
 return 0;
}
 
void main()
{
 clrscr();
 Train t;
 int c;
 fstream file;
 int choice;
 cout<<"\n1.New Train";
 cout<<"\n2.Enquiry from to";
 cout<<"\n3.Enquiry number";
 cout<<"\n4.Display file"; 
cin>>choice;
 if(choice==1)
 {
 file.open("tschedule",ios::app);
 do
 {
 t.changeschedule();
 file.write((char *)&t,sizeof(Train));
 cin>>c;
 }while(c);
 file.close();
 }
 else if(choice==4)
 {
 file.open("tschedule",ios::in);
 file.seekg(0);
 file.read((char *)&t,sizeof(Train));
 while(file)
 {
 t.display();
 file.read((char *)&t,sizeof(Train));
 }
 }
 else if(choice==2)
 {
  file.open("tschedule",ios::in);
  if(!file)
 return;
  int hit=0;
  char from[20],to[20];
  cout<<"From: ";
  gets(from);
  cout<<"To: ";
  gets(to);
  file.seekg(0);
  file.read((char *)&t,sizeof(Train));
  while(file)
  {
 hit=t.enquiry(from,to);
 if(hit)
  t.display();
 file.read((char *)&t,sizeof(Train));
  }
  if(!hit)
 cout<<"Not available";
  file.close();
 }
 else if(choice==3)
 {
  file.open("tschedule",ios::in);
  int hit=0;
  int tno;
  cout<<"Number: ";
  cin>>tno;
  file.seekg(0);
  file.read((char *)&t,sizeof(Train));
  while(file)
  {
 hit=t.enquiry(tno);
 if(hit)
  t.display();
 file.read((char *)&t,sizeof(Train));
  }
  if(!hit)
 cout<<"Not available";
 }
 getch();
}

I'm having a problem with files. When i write a Train object onto a file using write() function and then read it uing read() function I'm getting junk values for the data members....i checked to see if i'm making a mistake in getting input from user and display but changeschedule and display functions are working correctly. Please help.

Also, if i remove the date and time from my program it works fine so i dont know if there is a problem in using a structure within a class.