chujnia

#include <iostream>
#include <fstream>

using namespace std;

string text;
int shift;

void save(string text)
{
    fstream saveFile;
    string fileName = "a.txt";
    saveFile.open(fileName.c_str(),ios::out);
    saveFile << text;
    saveFile.close();
}

string load(string name)
{
    fstream loadFile;
    string line;
    loadFile.open(name);
    getline(loadFile,line);
    loadFile.close();
    return line;
}


string cezar_encrypt( string inp , int shift)
{
    for(int i = 0; i <= inp.length() ; i++)
    {
        if( inp[i] >= 65 && inp[i] <= 90 - shift || inp[i] >= 97 && inp[i] <= 122 - shift) inp[i] = int(text[i]) + shift;
        else if ( inp[i] >= 91 - shift && inp[i] <= 90 || inp[i] >= 123 - shift && inp[i] <= 122) inp[i] = int(text[i]) - 26 + shift;
        //else cout << int(inp[i]) << endl;
    }

    return inp;
}

string cezar_decrypt( string inp , int shift)
{
    for(int i = 0; i <= inp.length() ; i++)
    {
        if( inp[i] >= 65 && inp[i] <= 90 - shift || inp[i] >= 97 && inp[i] <= 122 - shift) inp[i] = int(text[i]) - shift;
        else if ( inp[i] >= 91 - shift && inp[i] <= 90 || inp[i] >= 123 - shift && inp[i] <= 122) inp[i] = int(text[i]) + 26 - shift;
        //else cout << int(inp[i]) << endl;
    }

    return inp;
}

int main()
{
    string text2 , encrypted_text;
    cout << "Podaj tekst do zaszyfrowania" << endl;
    cin >> text;
    cout << "Podaj przesunięcie" << endl;
    cin >> shift;
    cout << "Wynik:" << endl;
    encrypted_text = cezar_encrypt(text, shift);
    cout << encrypted_text << endl;
    save(encrypted_text);
    //cout << "Podaj klucz do deszyfrowania" << endl;
    //cin >> shift;
    text2 = load("a.txt");
    text = cezar_decrypt(text2 , shift);
    cout << "Wiadomosc po deszyfrowaniu: " << text << endl;

    return 0;
}