dora

#include "pch.h"
#include <fstream>
#include <string>
#include <algorithm>
#include <iostream>
#include <ctype.h>
#include <cstdlib>
#include <ctime>



using namespace std;
//Объявляем массив символов русского и английского алфавита
string alpha = "abcdefghijklmnopqrstuvwxyz";
string numb = "0123456789";

int main() {
	srand(time(NULL));
	ifstream keys("key.txt");
	ifstream start("start.txt");
	ofstream output("out.txt");
	string message;
	string key;
	string keybuf;
	string crypt;
	cout << endl;
	while (!keys.eof())
	{
		char buf;
		bool check = 0;
		keys >> buf;
		buf = tolower(buf);
		if ((buf >= 'a') && (buf <= 'z'))
		{
			for (int i = 0; i <= keybuf.length(); ++i)
			{
				if (keybuf[i] == buf)
					check = 1;
			}
			if (check == 0)
			{
				keybuf += buf;
				check = 0;
			}
		}
	}
	cout << keybuf << endl;
	if (keybuf.length() < 8) cout << "Wrong key" << endl;
	else {
		string first;
		string second;
		string third;

		int ukazi = 0;
		int ukazj = 0;
		cout << keybuf.length() << endl;
		if (keybuf.length() > 9) keybuf.erase(9, 100);
		first = keybuf;
		for (int i = 0; i < 26; ++i)
		{
			bool check = 0;
			for (int j = 0; j < keybuf.length(); ++j)
			{
				if (keybuf[j] == alpha[i]) check = 1;
			}
			if (check == 0) {
				if (second.length() < 9) {
					second += alpha[i];
				}
				else {
					third += alpha[i];
				}
			}
		}
		cout << first << endl << second << endl << third << endl;
		bool mode;
		cin >> mode;
		if (mode == 0) {
			string crypt;
			while (!start.eof()) {
				char buf;
				start >> buf;
				buf = tolower(buf);
				int nfirst = first.find(buf, 0);
				if (nfirst > 0) {
					int f = rand() % 6 + 4;
					crypt += numb[f];
					crypt += numb[nfirst + 1];
				}
				else {
					int nsecond = second.find(buf, 0);
					if (nsecond > 0) {
						int f = rand() % 2 + 2;
						crypt += numb[f];
						crypt += numb[nsecond + 1];
					}
					else{
						int nthird = third.find(buf, 0);
						if (nthird > 0) {
							crypt += numb[1];
							crypt += numb[nthird + 1];
						}
					}
				}
			}
			crypt.erase(crypt.length() - 2, 10);
			srand(time(NULL));
			int random = rand() % crypt.length();
			for (int i = 0; i < random; ++i)
			{
				int randplace = rand() % crypt.length();
				crypt.insert(randplace, "0");
			}
			cout << endl << crypt << endl;
			output << crypt;
		}
		else {
			cout << "Open text is: " << endl;
			string bufs;
			while (!start.eof()) {
				char buf;
				start >> buf;
				buf = tolower(buf);
				if (buf != '0') bufs += buf;
				if (bufs.length() == 2) {
					int n2 = numb.find(bufs[1], 0);
					int n1 = numb.find(bufs[0], 0);
					n2 -= 1;
					if ((n1 <= 9) && (n1 >= 4))
						cout << first[n2];
					else
						if (n1 == 1)
							cout << third[n2];
						else cout << second[n2];
					bufs.erase(0, 2);
				}
			}
			cout << endl;
		}
	}
	system("pause");
	return 0;
}