задание 6

#include <iostream>
#include <fstream>
#include <vector>
using namespace std;

int main()
{
	vector<string> st;
	string temp, temp2, temp3;
	ifstream in;
	in.open("D:\\c++\\Input.txt");
	while (!in.eof()) {
		in >> temp;
		st.push_back(temp);
	}
	for (int i = 0; i < st.size(); i++) {
		temp2 = st[i];
		for (int j = 0; j < temp2.size(); j++) {
			temp2[j] = temp2[j] + 3;
		}
		st[i] = temp2;
	}
	cout << "Encrypted message: ";
	for (int i = 0; i < st.size(); i++) {
		cout << st[i] << " ";
	}
	cout << "\nDecrypted message: ";
	for (int i = 0; i < st.size(); i++) {
		temp2 = st[i];
		for (int j = 0; j < temp2.size(); j++) {
			temp2[j] = temp2[j] - 3;
		}
		st[i] = temp2;
	}
	for (int i = 0; i < st.size(); i++) {
		cout << st[i] << " ";
	}
}