#include < fstream.h >
#include < conio.h >
#include < io.h >
class student{
   private:
      int no;
      char name[25];
      float fee;
   public:
      void getdata()
	    {
	 cout << "\n\n Roll Number : " ;
	 cin >> no;
	 cout << "\n\n Name : ";
	 cin >> name;
	 cout << "\n\n Fees : ";
	 cin >> fee;
	      }
void putdata()
	    {
	 cout << "\n\n Roll Number : " << no;
	 cout << "\n\n Name : " << name;
	 cout << "\n\n Fees : " << fee;

	      }
};
void main()
   {
   student s1;
   fstream stdfile;
   clrscr();
   stdfile.open("student.dat",ios::out|ios::in|ios::binary);
   char ch;
    do
      {
      s1.getdata();
      stdfile.write((char *)&s1,sizeof(s1));
      cout<<"\n Continue? y/n : ";
      cin>>ch;
      } while (ch=='Y'||ch=='y');
   clrscr();
   stdfile.seekg(0,ios::end); //moves the get pointer to the end of file
   int endposition=stdfile.tellg(); //returns current position of get or put pointer in bytes
   int n=endposition/sizeof(s1);  //So you will get the total number of records
   cout << "\n\n There are " << n <<" records in the file \n";
   int num;
   cout << "\n\n Enter the number of the record which want to read : ";
   cin >> num;
   int position=(num-1)*sizeof(s1);
   stdfile.seekg(position);
   stdfile.read((char *)&s1,sizeof(s1));
   s1.putdata();
   getch();
    }

Our aim is to provide information to the knowledge seekers.