C - C++ Files - Binary files

#include<iostream.h>
#include<fstream.h>
using namespace std;
 
class record
{
public:
  char name[10];
  int tam,eng,mat;
 
  void input()
  {
    cout<<"\n Enter name";
    cin>>name;
    cout<<"\nEnmter tam,eng,mat marks";
    cin>>tam>>eng>>mat;
  }
 
 
  void output()
  {
    cout<<"\n Name:"<<name;
    cout<<"\nTotal:"<<tam+eng+mat;
  }
};
 
 
void main()
{
  record rec;
  int i,j;
  ofstream outfile;
  outfile.open("mark.dat",ios::out|ios::binary);
  j=sizeof(record);
 
  for(i=1;i<=5;i++)
  {
    rec.input();
    outfile.write((char *) &rec,j);
  }
 
  outfile.close();
  ifstream infile;
  infile.open("mark.dat",ios::in|ios::binary);
 
  for(i=1;i<=5;i++)
  {
    infile.read((char *) & rec,j);
    rec.output();
  }
  infile.close();
}