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

int main( int argc, char *argv[] )
{
	unsigned BytesInFile; 
	unsigned BytesPerRecord = 4;
	unsigned Records;

	if( argc != 2 )
	{
		cout << "Usage: sortit <file>" << endl;	
		return 1;
	}

	fstream in;
	in.open( argv[1], ios::in | ios::out | ios::binary );

	if( !in )
	{
		cout << "Error opening " << argv[1] << endl;
		return 1;
	}

	in.seekg( 0, ios::end );
	BytesInFile = in.tellg();
	Records = BytesInFile / BytesPerRecord;	

	cout << "Bytes In File: " << BytesInFile << endl;
	cout << "Number of Records: " << Records << endl;
	cout << "BytesPerRecord: " << BytesPerRecord << endl;

	int x, y, i, j;

	for( i = 0; i < Records - 1; i++ )
	{
		for( j = 0; j < Records - 1; j++ )
		{
			in.seekg( j * BytesPerRecord, ios::beg );
			in >> x;
			in.seekg( j * BytesPerRecord + 4, ios::beg );
			in >> y;
			
			//cout << "x: " << x << " y: " << y << endl;
			//getchar();

			if( x > y )
			{
				in.seekp( j * BytesPerRecord, ios::beg );
				in << y << endl;
				in.seekp( j * BytesPerRecord + 4, ios::beg
);
				in << x << endl;
			}
		}
	}

	in.close();
	
	return 0;
}