cesarCrypto.cpp

#include "stdio.h"
#include "stdlib.h"
#include <iostream>
using namespace std;

int main(void)
{
    string sentence, alphabet, newAlphabet, rest, crypt;
    int shift = 0, choice = 0;
    alphabet = "abcdefghijklmnopqrstuvwxyz";
    cout << "Voulez-vous chiffrer (1) ou d\202chiffrer (2) : ";
    cin >> choice;
    if (choice == 1)
    {
        cout << "Entrez la phrase \205 chiffrer : ";
        cin >> sentence;
        cout << "Entrez le chiffre de C\202sar : ";
        cin >> shift;
        newAlphabet = alphabet.substr(shift);
        rest = alphabet.substr(0, shift);
        newAlphabet += rest;
        for(int i = 0; i < sentence.length(); ++i)
        {
            size_t pos = alphabet.find(sentence.at(i));
            crypt += newAlphabet.at(pos);
        }
    }
    else if (choice == 2)
    {
        cout << "Entrez la phrase \205 d\202chiffrer : ";
        cin >> sentence;
        cout << "Entrez le chiffre de C\202sar : ";
        cin >> shift;
        newAlphabet = alphabet.substr(shift);
        rest = alphabet.substr(0, shift);
        newAlphabet += rest;
        for(int i = 0; i < sentence.length(); ++i)
        {
            size_t pos = newAlphabet.find(sentence.at(i));
            crypt += alphabet.at(pos);
        }
    }
    else
    {
        cout << "Vous n'avez pas rentr\202 1 ou 2." << endl;
        return 0;
    }
    cout << crypt << endl;
    return 0;
}