#include <iostream>
#include <fstream>
#include <string>

using namespace std;

void encode(string key, string file)
{
	ifstream cin(file);
	ofstream cout("DC.txt");
	char c;
	int i = 0;
	while (!cin.eof())
	{
		c = cin.get();
		if (c != -1)
		{
			int tmp = c, help = key[i % key.length()];
			cout << char(tmp ^ help);
		}
		i++;
	}
	cin.close();
	cout.close();
}
void code(string key, string file)
{
	ifstream cin(file);
	ofstream cout("CD.txt");
	char c;
	int i = 0;
	while (!cin.eof())
	{
		c = cin.get();
		if (c != -1)
		{
			int tmp = c, help = key[i % key.length()];
			cout << char(tmp ^ help);
		}
		i++;
	}
	cin.close();
	cout.close();
}

int main()
{
	//setlocale(LC_ALL, "Russian");
	//char q = 'я'; cout << int(q);
	cout << "Sorry, but you can use this programm, if your code/encode file doesn't have Russian symbols.\nChoose the programm mode:\nWrite 1 if you need to encode file. Write 2 if you need to code file: ";
	int choice;
	cin >> choice;
	if (choice == 1)
	{
		string file, key;
		cout << "Write the name(with file extension) of file, which you need to encode: ";
		cin >> file;
		cout << "Write the key of code: ";
		cin >> key;
		encode(key, file);
		cout << "Decode file is DC.txt\n";
	}
	else
	{
		if (choice == 2)
		{
			string file, key;
			cout << "Write the name(with file extension) of file, which you need to code: ";
			cin >> file;
			cout << "Write the key of code: ";
			cin >> key;
			encode(key, file);
			cout << "Code file is CD.txt\n";
		}
	}
	cout << "My English is very well!!!";
	return 0;
}