/*
Author: Francesco Taurisano
This algorithm uses the Caesar's cipher to create an encoded file from an original plaintext file.
The secret key is read from the keyboard.
*/
#include<iostream>
#include<fstream>
using namespace std;
int main()
{
   char letter;
   int key;
   cout<<"Insert the secret key ";
   cin>>key;
   ifstream plaintext("c:/file1.txt");
   ofstream ciphertext("c:/file2.txt");
   while(plaintext.get(letter))
   {
     ciphertext.put(letter+key);                       
   }     
   plaintext.close();
   ciphertext.close();
   system("pause");
   return 0;
}