Please Help

[Stacey Johnson]

HI everyone,
I'm still working on this rational program I have to write. I'm writing a program that will compute the following summation series using rational class:
1/1 + 1/2 + 1/3 + ...+ 1/n
1/1 + 1/2 + 1/2^2 +...+ 1/2^n
I think I have the first part worked out mostly but now it's the second part. I know I definetly am doing something wrong. I'm trying to get the ^3's to increase up to 10 then give the sum. I don't know if I've don't that right. Can someone please help me!! I'm confused!
Below is what I've written so far:

import java.lang.*;
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);
Nextrtnl sum = new Nextrtnl(1,1);
for (int y = 1; y<=2; y++)
{
Nextrtnl y1 = new Nextrtnl (1,Math.pow(2,y));
for (int y1 = 2; y1<=10; y1++);
sum = sum.add(y1);
if (y1 !=10)
System.out.print(y1 + "+" + "");
else
System.out.print(y1 + "=" + "");
}
System.out.print(sum);
}

I thank all in advance for their help.
Stacey

[Julie de Wet]

for (int y1 = 2; y1<=10; y1++);

does nothing - there shouldn't be a semicolon after for(...)

[Julie de Wet]

import java.lang.*;
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);
      sum = new Rtnl(0,1);
      for (int y = 0; y<=10; y++)
      {
         Rtnl y1 = new Rtnl (1,Math.pow(2,y));
         sum = sum.add(y1);
         if (y != 10)
            System.out.print(y1 + "+" + "");
         else
            System.out.print(y1 + "=" + "");
      }
      System.out.print(sum);
}

The sum of the second series converges to 2
[ April 18, 2004: Message edited by: Julie de Wet ]

[Stacey Johnson]

Hi,
Thanks for the help, but can I get a little further explaination on the second half of the code. Because it won't compile and run yet I can't see the printout and deduct things from there.
Also I am getting a bunch of errors all pertaining to every "Rtnl" every time it comes up. All of the errors say it cannot resove symbol. I don't know what do to?
Can anyone give me some insight please?
Thanks Stacey

[Joe Ess]

Have you declared a class named Rtnl? If not, there's your problem. Can't create an instance of a class that doesn't exist. You will also have to put that public static void main(String [] args) method inside a class as well. Can't have a method outside of a class.