Лабы / ЭТМО / сделанные / FILE

#include <fstream.h>
#include <stdlib.h>
#include <conio.h>

class stream:public fstream{

 public:

  stream(const char* filename):fstream(filename, ios::in | ios::out | \
   ios::binary){};

  void in(const void* data, int len)
  {
   write((char *)data, len);
  }

  void out(void *buffer, int size)
  {
   read((char *)buffer, size);
  }

  stream &operator << (int data)
  {
   in(&data, sizeof(data));

   return *this;
  }

  stream &operator >> (int& data)
  {
   out(&data, sizeof(data));
   return *this;
  }

};




void main()
{
 stream file("bin.dat");
 int data;

 clrscr();

 cout<<"\nfirst\n";
 while(!file.eof())
 {
  file>>data;
  cout<<data<<endl;
 }

 file.seek(0, ios::beg);

 cout<<"second\n";
 while(!file.eof())
 {
  file>>data;
  cout<<data<<endl;
 }


 file.close();
}













/*

 int data, records, number, record_size = sizeof(int),\
  minmas[100], minelements = 0;

 cout<<"\nEnter Number: ";
 cin>>number;

 file<<1;
 file<<2;
 file<<3;
 file<<4;
 file<<5;
 file<<6;
 file<<7;
 file<<8;
 file<<9;
 file<<10;
 file<<10;


 file.seekg(-record_size, ios::end);
 file>>records;
 records;

 file.seekg(0, ios::beg);
 for(int i = 0; i<records; i++)
 {
  file>>data;
  cout<<"Record no "<<i<<" = "<<data<<endl;
  if(data<number)
  {
   minmas[i] = data;
   minelements++;
  }
 }

 file.seekp(records/2, ios::beg);

 for(int j = 0; j<minelements ; j++)
 {
  file<<minmas[j];
 }


 file.seekg(0, ios::beg);
 while(!file.eof()){
  file>>data;
   cout<<"\nData: "<<data;
 }






   cout<<"\nData: "<<data;
 }

  cout<<"\nRecords Found: "<<records<<endl;


  file.seekg(-record_size*records, ios::cur);
  file>>data;
  cout<<"\nData: "<<data;





// file.seekp();
// file>>data;
// cout<<"\nData: "<<data;
/*



 while(!file.eof()){
  file>>data;
   cout<<"\nData: "<<data;
   records++;
 }


//  while(!file.eof()){
//  file>>data;
//   cout<<"\nDEBUG:3: "<<data;

//  records++;
// }



// file.seekg(0, ios::beg);
 //file.seekp(records/2);

// while(records-->0)
// {
//  file>>data;
//  cout<<"\nDEBUG:2: "<<data;
  //if(data<number)file<<data;
// }

// file.seekg(0, ios::beg);
 //while(!file.eof()){
 // file>>data;
 // cout<<"\nData : "<<data<<endl;
// }

 file.close();


}
*/