an introduction to computer science using python 3 download

... It is legal to assign a char to an int variable int i = ‘a’; // assigns 97 to i • It is legal to assign an int to an char variable char c = 97; // assigns ‘a’ to c • It is possible to perform ... Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold     Chapter Preview In this chapter we will: • discuss four important data ... sequences of *, /, and % operators from left to right c Evaluate sequences of + and – operators from left to right     Precedence Examples • Example + 37 % / is the same as + ( (37 % 8) / 5) = +

Ngày tải lên: 11/01/2020, 20:03

... Chapter Classes and Methods III: Static Methods and Variables Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D ... class type • To create instances of the class using constructors • To send messages to instances of the class by invoking class instance methods • To know the class public interface – instance method ... allows the object to remain visible to clients – classes can be linked when a client passes an object as a message argument to another object     Object Containing Reference to Another Object  

Ngày tải lên: 11/01/2020, 18:40

... Chapter Iteration Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold     Chapter ... the Java while, for, and do-while statements • demonstrate the use of loop invariants to verify the correctness of loops • show the use of loops in data entry and computer animation     while ... Loop • Repeated executes body of the loop which can be a single or compound statement • A while loop will execute as long as its condition is true • An infinite loop will occur if the condition never

Ngày tải lên: 11/01/2020, 18:43

... Chapter 12 Inheritance and Exceptions Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold ... we will: • show how to organize predefined classes using Java packages • how access to methods and variables is controlled • discuss the use of class inheritance to refine and extend classes • ... name x = java.lang.Math.sqrt (3) ; • Using an import statement // to allow unqualified references to // all package classes import package.name.*; // to allow unqualified references to // a particular

Ngày tải lên: 11/01/2020, 18:45

... Chapter 14 Recursion Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, , E Reingold Chapter ... technique • show how recursion can be used to simplify the design of complex algorithms • present several well known recursive algorithms (e.g quicksort, merge sort, Guaussian elmination) • introduce ... structure and recursive implementations for several of its methods • present programs for drawing two types of fractal curves Recursion • Basic problem solving technique is to divide a problem into

Ngày tải lên: 11/01/2020, 18:46

... mouse events can be used to build Trang 3 Abstract Windowing Toolkit (AWT) ¢ Part of the Java distribution, but not part of the Java language itself ¢ AWT Is library of classes and methods used ... Trang 2 Chapter Preview In this chapter we will: introduce event driven programming show how a program can respond to mouse events (e.g clicks and mouse movements) demonstrate how to implement ... that first catch the event Listener classes send messages to an event manager requesting to be notified when a particular message occurs Trang 5 Creating Mouse Click Listeners 1 Import the java.awt.event

Ngày tải lên: 11/01/2020, 18:47

... Chapter Classes and Methods II Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold ... methods have access to the class instance variables – can be used for communication inside class     Initialization of Instance Variables • Instance variable declarations can contain initializers ... code 0) – booleans are initialized to false – object-type variables are initialized to the reference value null     Hose Class Methods void getData() // Reads and stores the height and // weight

Ngày tải lên: 11/01/2020, 19:00

... </CENTER> ¢ To display a text link to another web page <A HREF=& #34 ;“jojo.html”>Josephine</A> ¢ To display a picture link to another web page Trang 35 Applet Tag and HTML ¢ To include ... BodyMass(); Trang 36 Transforming a Java Program Into an Applet 1 Set the size you want the applet to be in the HTML file 2 Add the import statement to the Java code jJava.applet.”; 3 Change header ... TwoButtons contains a class Frame which contains a class Buttons A good UML diagram only shows the classes and associations that are important to understanding the architecture Trang 8 Using

Ngày tải lên: 11/01/2020, 19:02

... Chapter Classes and Methods I Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold ... 3, -3, … • double literals 3. 45, -48.2, 33 .0, … • print – Display text representation of argument and leave output cursor on the same line • println – Display text representation of argument and ... Hitwall.java using an editor • Compile the source program by typing javac Hitwall.java • Execute the compiled program by typing java Hitwall     Program Elements – Part • white space – blank lines and

Ngày tải lên: 11/01/2020, 19:06

... Chapter One-Dimensional Arrays Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold     Chapter ... When an array is passed as an argument to a method, what is passed is a pointer to the array, not a new array (arrays are passed by reference) • This means that if the method makes changes to the ... counts • Each box is an int variable • The numbers on top are each variable’s subscript or index • An array of size 10 has subscripts to     Array Subscripts • Arrays can contain any one type of value

Ngày tải lên: 11/01/2020, 19:27

... Trang 1 Chapter 1 What is Programming? Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by Trang 2 Chapter Preview In this ... prog1.class Trang 20 Running Your Own Java Program Enter the program source code in a data file using an editor Transform the source program into machine language or Java Bytecode using an compiler ... telling a computer exactly what to do * programming languages — languages for specifying sequences of directions to a computer ¢ algorithm — a sequence of language independent steps which Trang 5

Ngày tải lên: 11/01/2020, 19:29

... Chapter Nested Loops and Two-Dimensional Arrays Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, ... of two-dimensional arrays to represent grids of information • show how computer graphics are generated using pixels     Nested for Loops • Nested loops frequently used to process twodimensional ... the inner nested loop will depend on the index value of the outer loop • Example: for (i = 0; i < 3; i++) { out.print(“i= “; + i + “: j = “); for (j = 0; j

Ngày tải lên: 11/01/2020, 20:21

... Chapter 15 Text Processing and File Input/Output Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E ... StringBuffer class • show how files can be read and written • discuss how to handle file input and output exceptions • demonstrate how to perform console input and output Strings • Java provides ... said to wrap class Y if: Y is a concrete (not abstract) class W’s constructor takes Y as an argument and stores a local copy of Y W reimplements all of Y’s methods • A wrapper can wrap a class and

Ngày tải lên: 11/01/2020, 20:25

... Chapter 10 Classes and Methods IV: Static Methods and Variables Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D ... receiver and cannot refer to instance variables • It can refer to and manipulate class variables Classes with No Instance Variables or Methods • Some classes only contain class variables and methods ... static modifier Can be defined in any class Not associated with an object Is not invoked by sending it as a message to an object • The class method f in the class C is invoked using the notation

Ngày tải lên: 11/01/2020, 20:29

... Chapter Decision Making Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold     Chapter ... quantities for equality or inequality • Example: if (age >= 18) out.println(“You are eligible to vote.”);         Relational Operators < < less than > > greater than = greater than or equal to ... making in computer programming • describe the use of the Java if and switch statements • describe the use of Boolean expressions in Java if statements • discuss the use of integer selector variables

Ngày tải lên: 11/01/2020, 20:31

... Chapter Classes and Methods III: Static Methods and Variables Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D ... class type • To create instances of the class using constructors • To send messages to instances of the class by invoking class instance methods • To know the class public interface – instance method ... allows the object to remain visible to clients – classes can be linked when a client passes an object as a message argument to another object     Object Containing Reference to Another Object  

Ngày tải lên: 15/05/2020, 22:27

... Chapter Nested Loops and Two-Dimensional Arrays Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, ... of two-dimensional arrays to represent grids of information • show how computer graphics are generated using pixels     Nested for Loops • Nested loops frequently used to process twodimensional ... the inner nested loop will depend on the index value of the outer loop • Example: for (i = 0; i < 3; i++) { out.print(“i= “; + i + “: j = “); for (j = 0; j

Ngày tải lên: 15/05/2020, 22:29

... Chapter 12 Inheritance and Exceptions Lecture Slides to Accompany An Introduction to Computer Science Using Java (2nd Edition) by S.N Kamin, D Mickunas, E Reingold ... we will: • show how to organize predefined classes using Java packages • how access to methods and variables is controlled • discuss the use of class inheritance to refine and extend classes • ... name x = java.lang.Math.sqrt (3) ; • Using an import statement // to allow unqualified references to // all package classes import package.name.*; // to allow unqualified references to // a particular

Ngày tải lên: 15/05/2020, 22:33

... important to appreciate that, just as it took a full half-century (1900— 53) to recognize the reality of brain acti- vation in sleep, it has taken another half-century (19 53 20 03) for us to come to ... impossibly difficult task and helping us to discover the usually clear emotional salience of our dreams. 34 Dreaming An Introduction to the Science of Sleep J. ALLAN HOBSON, MD OXFORD UNIVERSITY ... yell at Richard to bid his friend stop. For some reason, he has to go upstairs to turn off the machine (although it appears to be fully portable and self-contained) and this takes an inordinate...

Ngày tải lên: 24/01/2014, 08:20

... choice of scale. It is therefore an important quantity in cosmology: it is an observable measure of the rate at which the Universe is expanding. An Introduction to the Science of Cosmology xii Preface Universe’ ... the random arrangement can produce fluctuations, accidental groupings; by random, and not clustered, we mean clumped no more than would be expected on average by chance.) On a scale larger than ... the parameters in equation (3. 12) are: α ≈ 1.0,  ∗ ≈ 10 −2 h 3 Mpc 3 , (3) = 2and L ∗ ≈ 10 10 h −2 L  . Quoted values for l fall in the range given in equation (3. 8). 3. 4 The mass -to- luminosity ratios...

Ngày tải lên: 17/03/2014, 13:34