#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <iostream>

using namespace std;

int main()
{
	int file1,file2,file3,file4,bsize;

	file1 = creat("/home/8/kimjas/660/abc1.txt",S_IRWXU);
	close(file1);
	
	file2 = creat("/home/8/kimjas/660/abc2.txt",S_IRWXU);
	close(file2);

	file1 = open("/usr/class/cis660/x.x",O_RDONLY);
	
	char buf[BUFSIZ];

	file2 = open("/home/kimjas/abc1.txt",O_RDWR);
	file3 = open("/home/kimjas/abc2.txt",O_RDWR);
	
	read(file1,buf,10);
	write(file2,buf,10);
	bsize = read(file1,buf,20);
	write(file3,buf,20);
	
	while(bsize >= 20)
	{
		read(file1,buf,10);
		write(file2,buf,10);
		bsize = read(file1,buf,20);
		write(file3,buf,20);
	}
	return 0;
}