#include <fstream.h>

const int MANY = 256;

int main()
{
	ifstream	infile;
	ifstream	maskfile;
	char		aChar;
	short		holder;
	short		collection[MANY];
	int			lcv;
	int			pick;
	short		coded;
	char		fromfile[30];

	cout << "Coded file name: ";
	cin >> fromfile;
	infile.open(fromfile);

	maskfile.open("mask.txt");
	for (lcv=0; lcv < MANY; lcv++)
		maskfile >> collection[lcv];
	maskfile.close();

	pick = 0;
	infile >> coded;
	while (infile)
	{
		coded ^= collection[pick];
		holder = coded % 2;
		for (lcv=0; lcv < 7; lcv++)
		{	
			coded >>= 1;
			holder <<= 1;
			holder += (coded % 2);
		}
		aChar = holder;
		pick = (pick == 255) ? 0 : (pick + 1);
		cout << aChar;
		infile >> coded;
	}
	infile.close();
	cout << endl;
	return 0;
}