Java challenge 2

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Java challenge 2

InvoiceXpress
Data:26-5-2017 Local: Lisboa

import java.util.Scanner;

public class Rupeal2 {

private int count;

private long fx(int n) throws IllegalArgumentException {
if (n < 0) {
throw new IllegalArgumentException("Negative Numbers aren't allowed!");
}
if (n == 0) {
return 1;
}
count++;

return //TODO;

;
}

public static void main(String[] args) {
try {
Scanner keyboard = new Scanner(System.in);

System.out.print("Input a number: ");

int n = keyboard.nextInt();

Rupeal2 r = new Rupeal2();

System.out.print("Value: " + r.fx(n) + " ");

keyboard.close();

System.out.println();

System.out.println("Iterations: " + r.getCount());

System.out.println("Please send the solution, sequence name and your cv to jobsatrupeal.com");
}
catch (IllegalArgumentException e) {
System.err.println(e.getMessage());
}

}

public int getCount() {
return count;
}

public void setCount(int count) {
this.count = count;
}
}

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