Fibonacci Sequence - Find Sum Of Even-valued Terms
May 14, 2015
I am not sure what is wrong with my code? The code produces a negative number when I type in 4000000 into the fib method parameter.
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:
1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.
Java Code:
public static void fib(int k) {
int result = 0;
int[] array = new int[k];
array[0] = 1;
array[1] = 2;
for (int i = 2; i < k; i++) {
[Code] ....
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Mar 23, 2014
Fibonacci Sequence Code:
public class FibSeqByIanNeumann {
public static void main(String[] args) {
Scanner get = new Scanner(System.in);
int ctr, num1, num2, fib, maxTimes;
System.out.print("How many sequences do you want?: ");
maxTimes = get.nextInt(); //inputs the maxium limit of the fib sequence
[code]....
how to do a simple YES/NO Loop so I can try to have it work on my code if I want to try to do the Fibonacci Sequence again.Now I think it might have something to do with a do/while loop.
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Feb 12, 2014
public class Fibonacci {
public static void main(String[] args) {
int[] numbers;
numbers = new int[20];
numbers[0] = 0;
numbers[1] = 1;
System.out.println("
[Code] ....
I wrote this program for my Java class to print out the first 20 numbers of the Fibonacci series. My assignment then tells me to Rewrite your program using dynamic array. I'm not sure how to do this.
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Apr 15, 2014
I am attempting a programming exercise to display the values in the Fibonacci sequence from F0 to F15. I understand the concept, but, for some reason my equation is simply creating a resulting string of numbers that simply increase by 2's. As, I know it is supposed to be the sum of the previous F and the F that precedes that one to total the new F number. It seems so simple yet I seem to be far off. As usual, I have worked my code for your review.
/*
* This program calculates the "Fibonacci sequence."
* A "sentinel" is used to limit the extent the calculation.
*/
import acm.program.*;
public class bookFibonacciTest2a extends ConsoleProgram {
/* Specifies the limit value of the calculations */
private static final int SENTINEL = 16;
public void run() {
println ("This program display Fibonacci sequence numbers 0 - 15.");
[Code] .....
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Oct 30, 2014
I have to find where in the fibonacci sequence a at number belongs, using a if or while loop.
Example
>55 is a Fibonacci number whose order in the sequence is 11
>35 is not a Fibonacci number. However, it lies between Fibonacci numbers 34 (order: 10) and 55 (order: 11)
import java.util.Scanner;
public class While {
public static void main(String[] args) {
System.out.println("Welcome to the Fibonacci Sequence Detector");
Scanner in = new Scanner(System.in);
[Code] .....
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Apr 29, 2014
Write a recursive method that calculates the Nth number in the Fibonacci sequence. The first and second numbers in the sequence (the base cases) are both 1. After that, each subsequent number is the sum of the previous two. Stated a bit more formally:
fib(n)={1fib(n−1)+fib(n−2)n<2otherwise
For example, here is the first few numbers in the sequence:
1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
Your fib method should be part of a class named Fibonacci. In addition to the fib method, the Fibonacci class should have a main method that calls fib(9). If the result doesn't equal 34, you should print an error message. Otherwise, it should print out a message saying that it was successful.
After writing your Fibonacci class, answer the following question: How many times is the fibonacci method called when calculating the 5th number in the sequence?
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Oct 30, 2014
I have to find where in the fibonacci sequence a at number belongs, using a while loop.
Example
>55 is a Fibonacci number whose order in the sequence is 11
>35 is not a Fibonacci number. However, it lies between Fibonacci numbers 34 (order: 10) and 55 (order: 11)
import java.util.Scanner;
public class While
{
public static void main(String[] args)
{
System.out.println("Welcome to the Fibonacci Sequence Detector");
[Code] ....
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Mar 12, 2014
Modify the Improved Fibonacci application to store its sequence in an array. Do this by creating a new class to hold both the value and a boolean value that says whether the value is even, and then having an array of object references to objects of that class.
Did I just need to declaring the variable in other class (for boolean value and the value itself) or else ?
Here is the code for ImprovedFibonacci.java
Java Code:
class ImprovedFibonacci {
static final int MAX_INDEX = 9;
/**
* Print out the first few Fibonacci numbers,
* marking evens with a '*'
*/
public static void main(String[] args) {
int lo = 1;
int hi = 1;
String mark;
[Code] ....
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May 28, 2014
I'm facing a Problem with the JUnit Test for a Fibonacci rabbits sequence. The JUnit Test should test if the function dynFib(int x) completes the calucation in time. The time given is 100ms. The sequence I wanted to be printed is 0 1 1 2 3 4 6 8 11 15 and I got it but the calculation takes more than 100ms. How can I make it calculate faster without using a loop?
I want to do it recursively and dynamically, I kept trying lots of methods but they did not work.
This is my Code:
public class TestFib {
private static int dynFib(int x, Integer[] array) {
array = new Integer[x + 1];
if (x < 0) {
throw new IllegalArgumentException();
[Code] .....
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Oct 24, 2014
I am trying to find the longest descending sequence without arrays. So 65124976231 would output 9762.
import java.util.*;
public class HelloWorld {
public static void main(String[] args){
String num = "";
int longestLen = 0;
int currLen = 0;
String max = "";
[Code]...
I keep getting: The longest descending sequence is: 6512 In an infinite loop.
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Mar 18, 2015
I must convert some Java fubction to a plain "Basic", as VB6. The problem I'm facing is this: Suppose I have an array like
Java Code:
private static final int[][] Terms = {
{193, 26, 13},
{183, 29, 14},
{170, 20, 11}
}; // total 659 terms mh_sh_highlight_all('java');
How do I populate the Terms array?
Is it:
Terms[0,0]=193;
Terms[1,0]=26;
Terms[2,0]=13;
Terms[0,1]=183;
Terms[1,1]=29;
Terms[2,1]=14;
Terms[0,2]=170;
Terms[1,2]=20;
Terms[2,2]=11;
?
I'm not sure this is right... Is there a way to automate this process? What if we have arrays like int[][][] Terms? This is terrible... Is there a software tool for this?
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Feb 10, 2014
a. Write a code that is written inside a body of a method named average that takes two parameters: N that determines number of terms you should calculate the average of and lowBound that is the beginning term of the geometric sequence. if lowBound is 4 and N is 3, then the average of 4, 8, 16 is calculated and returned.
My code runs fine if I set the test as 16, but I can't figure out what I could do to N to have it determine the number of terms. This is what I have so far...
public class AvgIt {
public static void main (String[]args) {
double result = average(4, 3);
System.out.println("Average is " + result);
[code]....
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Aug 12, 2014
I have just started learning Java from a local teacher, this teacher said that the Architecture Neutral refers to Hardware while Platform Independent refers to Operating System, but I found a link to a White Paper by James Gosling. The chapter 4 of this White Paper mentions about both binary code format that is independent of hardware architecture and operating system interfaces, but the main point to be noted is that he has put both under the heading Architecture Neutral. Does it mean that the original buzz word is Architecture Neutral, which includes both hardware and operating system independence?
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May 8, 2015
I have seen many ways of describing what objects are, one being that objects are a user-defined datatype. However, if objects are datatypes, then what does that make classes? To me, it seems as though classes should be the "types" of data defined by the programmer, and objects should be the specific "values" of that user defined data type. As an example, an integer would be a class, while 1 would be a "value" of that class, i.e. an object. From this point of view, I don't see why a specific number would be a data type... Therefore, why do we say that objects are user defined data types rather than classes?
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Dec 4, 2014
I have a swing jFrame set up with a control group which contains 3 radio buttons.
When one is clicked it sends its label to a jtextfield in a different class i have code parsing text by a term
Java Code:
Scanner s = null;
try {
s = new Scanner(new BufferedReader(new FileReader("/Stage_One.txt")));
s.useDelimiter("*");
String total = (s.next());
Pattern p = Pattern.compile("[]+");
[Code] ....
I just need to know how to access the jframe variables (textfields, panels and such) so i can use their inputs in code to filter a text file.
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Nov 28, 2014
I'm working on a project where I have to take an input text file with terms and create a glossary with hyperlinks. I've got it working halfway. It outputs the html files for some but not all of the terms and I can't figure out why.
I'm getting these errors:
Please enter the location of the input file: data/terms.txt
Please enter the location for the glossary: data/testOutput
Exception in thread "main" java.util.ConcurrentModificationException
at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:953)
[Code] .....
How would I fix them??
Code :
import java.util.Comparator;
import components.map.Map;
import components.map.Map2;
import components.queue.Queue;
import components.queue.Queue2;
import components.sequence.Sequence;
[Code] ....
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Apr 4, 2015
public class CarV5
{
// private instance variables
String Model1;
int endMiles1, startMiles1;
double gallonsUsed1, pricePerGallon1;
[Code] .....
When I try to compile the program, its telling me that it cannot find the Dist variable in the main method for calcMPG and calcGPM. I'm not sure if the methods are right for the calcGPM or calcMPG.
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Nov 30, 2014
how do we get the following numbers (1 2 3 5 8 13 21 34 55 89) out of the following code? I can't get my head around this loop....
HTML Code:
public class Fabnoci{
public static void main(String[] args)
{
int n=10,i,f0=1,f1=1,f2=1;
for(i=1;i<=n;i++)
{
f2=f0+f1;
[code]....
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Sep 22, 2014
I need to write a For Loop that prints out the first 12 Fibonacci numbers:1 1 2 3 5 8 13 21 34 55 89 144.The problem I am having is that I can not get the first two 1 numbers. I only get 1.2.3.5.8.....
int a=1;
int b=1;
for (int i=1; i<12;i++)
{
System.out.print(a+" ");
a=a+b;
b=a-b;
}
Do I need to add another For Loop that sub-tracks so that I can get the first digit of 1?
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Jan 21, 2014
public class E09_Fibonacci {
static int fib(int n) {
if (n <= 2)
return 1;
return fib(n-1) + fib(n-2);
}
public static void main(String[] args) {
// Get the max value from the command line:
int n = Integer.parseInt(args[0]);
if(n < 0) {
System.out.println("Cannot use negative numbers");
return;
}
for(int i = 1; i <= n; i++)
System.out.print(fib(i) + ", ");
}
}
please break down fib method shown above. I can't understand how the magic is happening inside that recursion.
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Jun 29, 2014
I want to write the first 30 Fibonacci numbers so wrote this script:
Java Code:
int num1 = 1;
int num2 = 1;
int num3;
String x = num1 + ", " + num2;
for (int i=1; i==28; i++){
num3 = num1 + num2;
x += ", " + num3;
num1 = num2;
num2 = num3;
}
System.out.println(x); mh_sh_highlight_all('java');
This script outputs this only: 1, 1
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Oct 27, 2014
The term "Local variable" is related to scope. That is a local variable is one which is defined in a certain block of code, and its scope is confined inside that block of code.And a "Member variable" is simple an instance variable.
I read in a discussion forum that when local variables are declared (example code below), their name reservation takes place in memory but they are not automatically initialized to anything. On the other hand, when member variables are declared, they are automatically initialized to null by default.
Java Code: public void myFunction () {
int [] myInt; // A local, member variable (because "static" keyword is not there) declared
} mh_sh_highlight_all('java');
So it seems that they are comparing local variables and member variables. While I think a member variable can also be be local in a block of code, isn't it?
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Jun 11, 2014
How to print 10 numbers in Fibonacci serious aftet given number?
Like 13 21 34...
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Nov 19, 2014
Its a program that calculates Fibonacci number.This program uses recursion.
import java.util.Scanner;
public class FibonacciMemoization{
static int[] fib = new int[60];
public static void main(String[] args){
Scanner input = new Scanner(System.in);
System.out.print("Enter a Number :");
int number = input.nextInt();
[code]...
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Jul 8, 2014
I wrote this tail recursive function that mirrors the iterative version, except that the loop in the iterative version is replaced by an if statement here and then a recursive call. Is this truly recursive? I have seen the fibo(n-1) + fibo(n - 2) version, but is this also an acceptable recursive solution? Why is it never solved this way?
public class FiboRecursive {
public static int fibo (int n) {
int sum = 0;
int n1 = 1;
int n2 = 1;
if (n == 1 || n == 2) {
sum = 1;
[Code] ...
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Feb 8, 2014
Program to generate Fibonacci series program using java multithreading.
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