#include <iostream>
#include <fstream>
#include <string>
#include<cctype>
#include<time.h>
#define _CRT_SECURE_NO_WARNINGS
#pragma warning(disable: 4996)
using namespace std;
int main() {
	srand(time(0));
	int a = 20;
	FILE* fp;
	fp = fopen("test.txt", "w+");
	fprintf(fp, "This is line 1\n");
	fclose(fp);

	FILE* fp1;
	fp1 = fopen("test1.txt", "w+");
	fclose(fp1);
	fstream test;

	test.open("test.txt", ios::in);
	if (test.is_open()) {
		string text;
		string code;
		while (getline(test, text))
		{
			int *numbers = new int[text.length()];
			for (int i = 0; i < text.length(); i++)
			{
				if (isblank(text[i]) != 0)
				{
					cout << text[i];
					code += " ";
				}
				else
				{
					int x = (rand() % 30);
					numbers[i] = x;
					char t = text[i] + x;
					cout << t;
					code += t;
				}
			}
			cout << endl;
			fstream test1;
			test1.open("test1.txt", ios::out);
			if (test1.is_open())
			{
				test1 << code;
				test1.close();
			}
			test1.open("test1.txt", ios::in);
			if (test1.is_open()) {
				string text1;
				while (getline(test1, text1)) {
					for (int i = 0; i < text1.length(); i++)
					{
						char t1 = text1[i] - numbers[i];
						if (t1 == 'S')
							cout << " ";
						else
						cout << t1;
					}
				}
				test1.close();
			}

		}
		test.close();
	}


}