Question

I need to generate a program that generates the Fibonacci Sequence
Here is what I have so far:

import java.util.Scanner;

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

        System.out.println("Enter n:");
        int n = in.nextInt();

        EP64 fg = new EP64();

        for (int i = 1; i <= n; i++)
            System.out.println(fg.nextNumber());
    }
}



public class EP64
{

    public static void nextNumber(int n)
    {
        int fold1 = 1;
        int fold2 = 1;
        int fnew = fold1 + fold2;        
        fold1 = fnew;
    }
}

I get an error on:

    System.out.println(fg.nextNumber());

saying:
method nextNumber in class EP64 cannot be applied to given types:
required: int
found: no arguments
reason: actual and formal argument lists differ in length

and can someone also tell me if I am doing this program right? If not, help! I looked at other similar questions but I cannot make much sense of them

Thank you all!

Answer 1

method nextNumber in class EP64 cannot be applied to given types: required: int found: no arguments reason: actual and formal argument lists differ in length

Your

public static void nextNumber(int n)
                             ^^^^^^^

says that any call to the method must provide an integer as argument. But here:

System.out.println(fg.nextNumber());
                                ^^    you need to add an integer argument

you violate this by providing no argument.

As your code reads now, I’d probably drop the int n argument.

and can someone also tell me if I am doing this program right?

Naah, not really…

• fold1 and fold2 should probably be member variables (so they don’t get reset in every call to the method),
• You’re forgetting to update fold2 (you only update fold1),
• Also, you probably want to return an int from the nextNumber method.

Read up on

• Official Java Tutorial: Defining Methods