zad mat 4 fstream

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

ifstream a,b;
ofstream c;
string x;
string y;

int main()
{
    a.open("sz.txt");
    b.open("klucze2.txt");
    c.open("wynik4b.txt");

    while (a >> x)
    {
        b >> y;

        while (x.size() > y.size())
        {
            y = y + y;
        }

        for(int i = 0; i < x.size(); i++)
        {
            int kod = int(x[i]) + int(y[i]) - 64;

            if(kod > 90)
            {
                kod -= 26;
            }
            c << char(kod);

        }
        c << endl;
    }

    a.close();
    b.close();
    c.close();

    return 0;
}