Karel J Robot.

Slides:

Advertisements

Similar presentations

1 karel_IF_part1 Conditional Statements Flavor 1: if ( ) { } For now: these are method invokations (see next slide)

Advertisements

Karel – Making More Complex Decisions IF / THEN / ELSE IF THEN BEGIN Instructions END ELSE BEGIN Instructions END Do these when test = False Do these when.

1 Note: Original slides provided by and modified for Mr. Smith’s AP Computer Science A classwww.apComputerScience.com.

1 of 3 Karel Karel is an educational programming language for beginners, created by Richard E. Pattis (currently at Pace University, NY). Pattis used the.

Copyright, Joseph Bergin

Nested If Statements While Loops

1 karel_part4_functions.ppt Functions Functions return values or Objects. –Using a function allows the programmer to focus on other task. –Using a function.

Murphy’s Laws. Things are more complex than they seem to be. Things take longer than expected. Things cost more than expected. If something can go wrong,

Chapter 3 Extending the Robot Programming Language.

You ARE NOT ALLOWED To Copy Files!!!. You ARE NOT ALLOWED To Be Told What to Write in the Program.

1 Inheritance in Java Behind the scenes: new Objects from old.

CMPUT 101 Lab # 2 September 17, :00 – 16:50.

Karel the Robot -- ITERATE Problem Statement: Karel is told to “take a walk around the block!” Revise Algorithm: Define move ahead 5 streets Define turnright.

Karel The Robot In the beginning… software. Karel the Robot  All robots are controlled by software  Artificially intelligent robots that can “think”

Polymorphism Are there different ways to solve the Harvester problem? – Robot teams – instead of one robot to solve a problem, let’s get a team of robots.

Robot? What’s a Robot? Introducing Karel-the-Robot.

Extending the Robot Programming Language In the Robot world 1 mile = 8 blocks Suppose we want a robot to run a marathon (26+ miles)? Does our program have.

Karel JRobot Karel is an educational programming language for beginners, created by Richard E. Pattis (currently at Pace University, NY). Pattis used the.

Chapter 5 Conditionally Executing Instructions

1 karel_part5_loops Iteration (Loops) Loops repeat a set of instructions Two types of loops: –Definite loops ( for ) perform instructions explicit (known)

Ch. 2 1 Karel – Primitive Instructions Basic tools with which all problems are solved (analogies: LeftSpinngingRobot, RightSpinningRobot, GuardRobot, etc)

Karel J Robot An introduction to BlueJ and Object- Oriented Programming.

1 Classes begin with capital letters (i.e. UrRobot). Methods, objects, and variable names begin with lower case (camelCase) Use indentation to line up.

1 Note: Original slides provided by and modified for Mr. Smith’s AP Computer Science A classwww.apComputerScience.com.

1 Ch. 7 Recursion similar to iteration in that you repeatedly do a little bit of the task and then “loop” again and work on a smaller piece - eventually.

Karel J. Robot A Gentle Introduction to the Art of Object Oriented Programming.

Karel the Robot A Gentle Introduction to the Art of Programming.

Programming Errors Lexical errors – occur whenever Karel reads a word that is not in his vocabulary. Example in English: We are asking directions and instead.

Thanks to Dr. Kris Schindler for this (and all Karel the Robot slides)

Karel J. Robot Tool for learning OOP (Lecture covers Ch. 1 and 2)

1 karel_part2_Inheritance Extending Robots Tired of writing turnRight every time you start a new karel project. How do we avoid re-writing code all the.

1 Karel – Chapter 6 Instructions That Repeat Note: Original slides provided by and modified for Mr. Smith’s AP Computer Science.

1 Karel – Chapter 5 Conditionally Executing Instructions Note: Original slides provided by and modified for Mr. Smith’s AP Computer.

Karel the Robot A Gentle Introduction to the Art of Object- Oriented Programming in Java.

1 Karel J Robot OOP approach to learning computer science “Its study involves development of the ability to abstract the essential features of a problem.

Georgia Institute of Technology Simulations Barb Ericson Jan 2005.

15-100: Introduction to Programming w/ Java * Ananda Gunawardena -- Lecture – School of Computer Science – Phone : (x81559) – Office: Wean Hall.

Chapter 5.  We’ve been using UrRobot – knows only 5 things  Let’s now use a new type of Robot: Robot!  i.e. – public class MileMover extends Robot.

Introduction to OOP in VB.NET using Robots ACSE Conference, Nov 2004 Michael Devoy Monsignor Doyle C.S.S., Cambridge

Extending Karel’s Vocabulary This PPT originated with Dr. Judy Hankins Modifications have been done by Dr. Untch & Dr. Cripps.

1 Note: Original slides provided by and modified for Mr. Smith’s AP Computer Science A classwww.apComputerScience.com.

Introduction to Computer Science

Ch. 2 1 Karel – Primitive Instructions Basic tools with which all problems are solved (analogies: carpentry, geometry) –move() –turnLeft() –putBeeper()

Mile-long hurdle race Suppose that we want to program Karel to run a one-mile long hurdle race, where vertical wall sections represent hurdles. The hurdles.

Karel the Robot – Review Primitive Commands move pickbeeper putbeeper turnleft turnoff Karel’s program statements are separated by a semicolon (;) Copyright.

1 Karel – Chapter 5 Conditionally Executing Instructions Note: Original slides provided by and modified for Mr. Smith’s AP Computer.

1 Note: Original slides provided by and modified for Mr. Smith’s AP Computer Science A classwww.apComputerScience.com.

Karel the Robot – Review Primitive Commands move pickbeeper putbeeper turnleft Turnoff Karel’s program statements are separated by a semicolon (;) Copyright.

Compiler Errors Syntax error Lexical Can not resolve/find symbol Can not be applied Execution error Oh wait, a run time error Intent error It ran, but.

Karel the Robot – Review Primitive Commands move pickbeeper putbeeper turnleft Turnoff Karel’s program statements are separated by a semicolon (;) Copyright.

1 Chapter 5 Karel J Robot 2 Chapter 5 Chapter 5 Conditional Statements Flavor 1: if ( ) { } For now: these are method invocations (see next slide)

Chapter 3 Extending the Robot Programming Language.

Karel – Primitive Instructions

Mile-long hurdle race Suppose that we want to program Karel to run a one-mile long hurdle race, where vertical wall sections represent hurdles. The hurdles.

In the beginning… software

Copyright © 2008 by Helene G. Kershner

Copyright © 2008 by Helene G. Kershner

karel_part4_functions_2

Karel – Primitive Instructions

CS 106A, Lecture 2 Programming with Karel

Karel J Robot OOP approach to learning computer science

Algorithm The key is the step-by-step instructions.

Karel the Robot – Making Decisions

A Gentle Introduction to the Art of Object Oriented Programming

Karel J Robot OOP approach to learning computer science

Algorithm The key is the step-by-step instructions.

Nested If Statements While Loops

Karel – Primitive Instructions

Presentation transcript:

Karel J Robot

“Meet Karel J Robot” zipped folder in Canvas Save, compile, then run this program.

Questions Name of project? Name of class? Name of main method? Name of project? Getting Started Name of class? MyFirstRobot Name of main method? Main

Questions…. What is imported? Name of object? karel is a member of what super class? Tip: karel is a new what? What is the name of karel’s world? Where is karel declared? What is imported? Kareltherobot.*\; (this is a “package” that already contains a class named UrRobot Name of object? karel karel is a member of what super class? Tip: karel is a new what? UrRobot What is the name of karel’s world? MyFirstRobot.kwld Where is karel delivered? Street 2, Avenue 2, facing East, with 0 beepers in his bag.

Questions What are the methods that every UrRobot class member can do? Move turnOff turnLeft pickBeeper putBeeper

Questions What are the methods that every UrRobot class member can do? Move turnOff turnLeft pickBeeper putBeeper Move turnOff turnLeft pickBeeper putBeeper

Questions What are the methods that every UrRobot class member can do? Move: Moves forward one block turnOff: Turns off, then stops program turnLeft: Turns 90 degrees left pickBeeper: Gets beeper on current corner putBeeper: Puts beeper on current corner Move turnOff turnLeft pickBeeper putBeeper

Questions What can cause an UrRobot object to shut off? (and stop your program!) Move turnOff turnLeft pickBeeper putBeeper Move turnOff turnLeft pickBeeper putBeeper

Questions What can cause an UrRobot object to shut off? (and stop your program!) Move into a wall turnOff (this should be obvious) turnLeft – no problem here pickBeeper – when no beepers are there putBeeper – when karel has none in his bag Move turnOff turnLeft pickBeeper putBeeper

Error Classification 4-types lexical error (compiler catches) word not in its dictionary syntax error (compiler catches) incorrect grammar, punctuation, incorrect location of a statement execution error (run-time environment catches) can’t perform what you ask (at run-time) intent error (logic - guess who catches this one!) program terminates successfully – junk output, however