package br.ufscar.dc.cifra;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

/**
 *
 * @author 726600
 */
public class Cesar {

    public void encripte(String fileIn, String fileOut, int k) {
        int i;
        try {
            FileReader ler = new FileReader(fileIn);
            BufferedReader input = new BufferedReader(ler);

            FileWriter escrever = new FileWriter(fileOut);
            BufferedWriter output = new BufferedWriter(escrever);

            while ((i = ler.read()) != -1) {
                char c = (char) i;
                int aux = (int) c + k;
                if (((int) 'Z' + k) > (int)'z') {
                    aux -= 26;
                    escrever.write(aux);
                }
                if (((int) 'A' + k) < (int)'a') {
                    aux += 26;
                    escrever.write(aux);
                }

                /*if((int)c =(int)'a'<=  && (int)c < = (int)'z'){
                for (int j = 0; j <= fileIn.length(); j++) {
                    if ((int)(c + k) % (int)'z' > 65){
                        escrever.write((int)(c + k) % (int)'z');
                    } else if((int)(c + k) % (int)'z' < 65) {
                        escrever.write(((int)(c + k) % (int)'z')+ 64);
                    }*/
            }

            input.close();
            output.close();
        } catch (IOException e) {

        }

    }

    public static void main(String[] args) {
        Cesar copia = new Cesar();
        copia.encripte("entrada.txt", "saida.txt", 10);
    }
}