Back to rational problem

[Stacey Johnson]

Hi all!
Well I had to take a break for a bit but now I'm back and working on my rationals problem. I'm suppose to have an output like the following:
1/1 + 1/2 + 1/3 + ...+ 1/n
1/1 + 1/2 + 1/2^2 +...+ 1/2^n
I think I've got my constructor mostly cleaned up but I'm still getting a few errors that I"m not sure what to do. Below is my code then the errors:

import java.lang.*;
 public class Exercise9_1{
public static void main (String [] args){
Rtnl sum = new Rtnl(0,1);
for (int x = 1; x<=23; x++)
{
Rtnl x1 = new Rtnl(1,x);
sum = sum.add(x1);
if (x!=23)
System.out.print(x1 + "+" + "");
else
System.out.print(x1 + "=" + "");
}
System.out.print(sum);

Rtnl r = new Rtnl(1,2);
for (int y = 0; y<=10; y++)
{
r = new Rtnl(1, (int)Math.pow(2,n));
sum.add(y1);

if (y1 !=10)
System.out.print(y1 + "+" + "");
else
System.out.print(y1 + "=" + "");
}
System.out.print(sum);
}
}
class Rtnl {
private int numerator = 0;
private int denominator = 1;

public Rtnl{
}

public Rtnl (int num, int denom){
this.numerator = num;
this.denominator = denom;
}

public int getNumerator{
return numerator;
}

public int getDenominator{
return denominator;
}
}

Some of my errors are:

cannot resolve symbol
symbol : constructor Rtnl (int,int)
location: class Rtnl
Rtnl sum = new Rtnl(0,1);
^
java:61: cannot resolve symbol
symbol : constructor Rtnl (int,int)
location: class Rtnl
Rtnl x1 = new Rtnl(1,x);
^
java:62: cannot resolve symbol
symbol : method add (Rtnl)
location: class Rtnl
sum = sum.add(x1);
^

I'm sure you can see a theme of my errors, but I just don't know what to do. Can anyone help?
Stacey

[Stefan Wagner]

Your constructor needs round braces '( )'.

public Rtnl () {

similiar it is with the methods:

public int getNumerator () {

but since you don't call them, you may delete them.
Reread about the syntax of methods.
about initialising variables.
I would go a few steps back in the Excercises, since you missed a lot of points. (When solving your errors, new ones which where hidden occur - and I can't even see what you're trying to do...

[John Smith]

You have multiple problems here, and you confused the compiler. The good news is, all of your problem are of the same nature, such as in this segment of your code:

    public int getNumerator {
        return numerator;
    }

This is not how a method is defined in Java. Perhaps what you meant was the code below?

    public int getNumerator() {
        return numerator;
    }

[Stacey Johnson]

Hello,
Okay I've fixed the stupid error regarding the () but what does the following error mean?
java:62: cannot resolve symbol
symbol : method add (Rtnl)
location: class Rtnl
sum = sum.add(x1);
^

Stacey

[C. Nimo]

sum is an Rtn1 object.
you are trying to invoke a method called add() on this object.
however, your Rtn1 class has no method definition for add()

[Stacey Johnson]

I'm completely lost. I don't know what to do anymore. Do I need constructors in this code to get my end result or have I been led down the wrong path. I am sooo close to quitting my course because I just don't know what to do with this program anymore. I don't even know where to look to find answers to my questions and errors. Is there anyone out there to shed some light on this for me? I feel like I'm beating my head against the wall.