/*
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 */
package derivata;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;

/**
 *
 * @author Lars
 */
public class Derivata {

    static ArrayList<Double> x = new ArrayList<>();

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String variable;
        System.out.println("input of numers in char input must be set, exponents and variables count ass one so x^1 is two different");
        int exp;
        String nameOfFunction = "F" + "'" + "() = ";
        //  read the username from the command-line; need to use try/catch with the
        //  readLine() method
        try {
            System.out.println("enter first variable eg. x/y/a");
            variable = br.readLine();
            System.out.println("enter the exponent of the first variable if exponent doesnt exist, put 1 in");
            exp = Integer.parseInt(br.readLine());
            if (exp > 0) {
                exp += -1;
            }
            System.out.println(nameOfFunction + (exp + 1) + variable + "^" + exp);
        } catch (IOException ioe) {
            System.out.println("IO error trying to read your name!");
            System.exit(1);
        }

    }
}