Author Archives: Mr. M

String Assignments SUPA 2015-16

Unit 3 Strings

Strings in Java
String Loops Review (word doc)
- - Strings Assignments This should be too easy for anyone who took the Java course so skip these if they are too easy for you
- Looping over String Projects
- String Loops 1
- String Loops 2 (must do) Due:EOD Tuesday 10/22
- String Projects #1 do the (Validate User Input Project)
- testcases_validate_form
- Required Coding Bat Problems
- Some Practice Problems

Alice Unit 2

This Page

1) Quiz topics overview

2) Unit 2 assignments

Unit 2 Quiz (mid -november-ish)

Review sheet with answers posted in Google Drive
converting other bases to decimals (unit 1)
- practice here
methods vs functions
- definitions
- meaning of ‘return a value’
- screenshots from Alice with connection to these definitions
variables
- definition
- types of variables
  - number
  - boolean
  - string
- use of strings
identify where the ‘local variable’ button is in Alice

Drag Racing:

( DO NOT SUBMIT THIS VIA Google classroom. Show me this in class)
Use at least 1 comment Link
Create a world with a road (from the City collection) and two cars (from the Vehicles collection).
Resize the road as necessary to match the size of the cars. The cars should be lined up side by side at one end of the road, which is a drag strip.
Put an object at the end of the race to signify the ‘finish line’
When the world is played, the cars should simultaneously move to the other end of the road and stop (You must use “do together”).
use the “move” method for both cars
Change the duration of the move method (see pic below) so that one car arrives before the other).
Position the camera so you can see the cars as they approach the end of the drag strip.
use a function to figure out how far they should move (You want to replace the value “5 meters” with a distance function)

Then modify it

create a variable called driveDistance and set its value to 1
1. set the value of driveDistance to the returned value of a the distance in front of function
the car should move forward driveDistance meters

Space Ship Repair

spaceship_repair

Create a space world with an astronaut and two spaceships(from the Web gallery’s Space collection). One of the spaceships is stranded with engine trouble, and the astronaut has arrived in the other spaceship to perform a repair.

The astronaut should initially be positioned just outside one of the spaceships, about to perform a space walk to the other ship. When the world is played, the astronaut should initially be positioned just outside one of the spaceships, about to perform a space walk to the other ship.
create a variable called walkingDistance (to represent how far the astronaut must walk)
set the value of walkingDistance to the returned value of a proximity function.
When the world is played, the astronaut should float to the stranded spaceship, appear to work for a few moments, and then float back to the rescue ship. Hint : to get the spaceship guy to move in the right way (towards the ship). Use the “turn to face” method
The repaired ship should then fly away, off the screen.

Before submitting check out some examples of code that prior students used and that did not get full credit here .

Apollo 15

During the Apollo 15 mission to the moon, astronaut David Scott performed an experiment to prove that Galileo was right when he said that any two objects dropped at the same time would land on the ground at the same time in the absence of air. Scott, standing on the surface of the moon, dropped a hammer and a feather and indeed both objects hit the ground simultaneously.(Again, you must use “do together”)
1. Create an Alice world that recreates the experiment. You will find classes for the astronaut, lunar Lander, and the moon’s surface in the Web gallery’s Space collection. You can find a class for the Hammer in the Objects collection. Substitute any object of your choice for the feather.
2. Create a variable called dropDistance
3. set the value of this variable to the returned value of a distance function to make the objects fall the distance above the ground. Use
4. Make the two objects fall down the value of the dropDistance

B Before handing it in, look at some examples of work that students did and that did not receive full credit,. here.

End of Unit Open assignment

Tell a short story that
at least 3 objects
at least 2 variables
at least 2 functions
- sets the value of a variable to a returned value of a function
uses that variable to move one of the objects
- ie make sure that your variable is actually used to do something.

Below is just one example. Your story can be about any topic.

Old assignments (ignore)

Penguin on a Table: Create a world with a penguin and a table. The penguin should be facing the table, standing next to it. The penguin should simultaneously flap its wings (use the wing_flap method) and move up in the air a distance that is exactly 1 meter higher than the height of the table. You can call the table’s height function to get its height. The penguin should then move forward to approximately the center of the table, and then move down to the surface of the table

What as a String

Intro to CS 2015-16

Alice Unit 1

1) Complete packets #3- 8 by Wednesday the 24th
2) Assignment #1, Due Friday October 3rd
- at least 10 instructions
- modify a ‘subpart’
- 1 do-together statement
- at least 3 different objects
- Worth 7 points.
- To get a 7/7 you must achieve the ‘wow factor’–ie go above and beyond to create a superior final project

Quiz: TBA
- binary number systems (see dropbox notes for review)
- converting from various bases to base 10 (see dropbox notes for review)
- comment vs instruction in Alice

Last year’s class

Java Extra Credit

Recommended extra credit problems from project Euler

Project Euler

Problem 501

Coding Bat extensions

Centered Average : http://codingbat.com/prob/p136585 . Make this work for multiple values of largest and smallest. ie if 99 is the largest and it appears 3 times then do *not* count all 3 of the 99’s.

Other Mr. M Challenges

Multiply in other bases

Binary Search Algorithm

Binary Search

from http://www.mathwarehouse.com/programming/gifs/binary-vs-linear-search.php

From Programming Animated Gifs

Best Case Binary Search

From Programming Animated Gifs

http://

mrmonline.org/wp-content/uploads/2014/02/binary-search-wikepedia.gif

Bank Runner Class

Bank Class

This is a modified version of this bank assignment

The responsibilities of this class are to

manage an Array of Accounts that could be any kind of account
add an Account (of any type)
remove an account by
- account id
- owner (a Person object)

Methods
- Person[] topAccountOwners(int number )
  - this method returns the top number owners with the greatest amount of cash in 1 account
- ** boolean binarySearch( int accountNumber) // this method should implement the binary search algorithm to determine if the account acct exists . Note for binary search to work, what must be true?
- ** extra credit Account[] sortByAccountId()
  - this method returns an array of Accounts sorted by amount in the account

Bank Account Inheritance Assignment

Person Class

This page is an edited version of this (old) assignment

Constructor

public Person( String _name, int _age)

instance Variables

private String name
private int age

Methods

public String getName()
public boolean equals(Person other) // assume that two objects with same age and name are equal

Account – Super Class

Static Variable(s)

static private int nextAccountNum

Constructor

public Account( double_balance, Person _owner)

instance Variables

private int accountNumber
protected double balance
protected Person[] owners

Methods

public int getAccountNumber()
public void deposit(double amount)
public double getCurrentBalance()
public boolean withdraw(double amount); // returns false if amount > this.balance
public boolean equals(Account other)
public String toString()
public void addOwner(Person p)
public void removeOwner( Person p)
public Person[] getOwners()

CheckingAccount extends Account

instance Variables
- private int checksWritten
Acessors and Mutators
- void writeCheck( double amount) –> tries to call super.withDraw() as long as the balance is enough and records a new check number

SavingsAccount extends Account

instance variables
- private double interestRate
- double[] dailyBalances
static variables
- public static final int MINIMUM_BALANCE=100; // this is the absolute minimum amount of money that must always be in the account
methods
- public boolean withdraw(double amount) //@override the withdraw() method to ensure that currentBalance the never gets below MINIMUM_BALANCE
- public void recordDailyBalance() // @ record current day’s balance by storing it in dailyBalances