TAILIEUCHUNG - Object Oriented Programming (8)

CSC241: Object Oriented Programming. Lecture No 08. 1 Previous Lecture.•. Abstract data type (ADT).•. Container classes.•. Proxy classes.•. Operator overloading. 2 Today’s Lecture.•. Operator overloading.•. Overloading unary operator. o ++. o --.•. Argument of overloaded function. – Post increment. 3 Operator overloading.•. For example, statements like. – (d1, d2);. or the similar but equally obscure. – d3 = (d2);.•. can be changed to the much more readable. – d3 = d1 + d2;. 4 Examples of c++ overloaded operator.•. Addition + and subtraction – operator. § +, – operators perform differently, depending on their. context in integer arithmetic, floating-point arithmetic. and pointer arithmetic•. Stream insertion (>) operator. (cout>). § > is used both as the stream extraction operator and. as the bitwise right-shift operator. § > are overloaded in the C++ Standard Library. std 5Syntax of overloaded operator function.•. An operator is overloaded by writing a non-static. member function definition.•. Function name becomes the keyword operator. followed by the symbol for the operator being. overloaded. – . operator + () { . }.•. Function name operator+ would be used to. overload the addition operator (+).•. Assignment operator (=) may be used with every. class to perform member wise assignment of the. data members 6 Precedence, Associativity and No. of. Operands.•. Precedence means which operator to solve first. (+, -, *, /, = ).•. The precedence of an operator cannot be. changed by overloading.•. The associativity of an operator cannot be. changed by overloading.•. Overloaded unary operators (++, --) remain. unary operators.•. overloaded binary operators remain binary. operators. 7 Creating New Operators.•. It is not possible to create new operators.•. only existing operators can be overloaded. – . ** can be used for exponential in some. programming languages. – ** is not in the list od existing operator so it cannot be. overloaded.•. Attempting to create new operators via operator. overloading is a syntax error 8 Operators for Fundamental Types.•. The meaning of how an operator works on. fundamental types cannot be changed by. operator overloading.•. For example, programmer cannot change the. meaning of how + adds two integers.•. Operator overloading works only with. – objects of user-defined types or. – a mixture of an object of a user-defined type and an. object of a fundamental type. 9 Examples.•. c1++; or c1--;. – Overloading ++ and -- unary operator.•. dist3 = dist1 + dist2;. – Overloading assignment and addition binary operator. – It does not mean that += is also overloaded for. Distance objects.•. dist1+= dist2; or dist1-=dist2. 10 Overloading Unary Operators•. Examples of unary operators are the increment. and decrement operators ++ and --, and the. unary minus, as in -33.•. Counter class example. –

• Sáng kiến kinh nghiệm
• Object Oriented Programming
• Object Initializatio
• Usage Acquaint
• Data initialization
• Object usage
• Object declaration
• Programming languages
• Lecture Object oriented programming
• Lập trình hướng đối tượng
• Object oriented programming with Java
• Object oriented programming in C++
• Software object
• Bài giảng Lập trình hướng đối tượng
• Architectural models
• Mechanical models
• Tangible object
• Lesson Object
• Unified inheritance hierarchy
• Access through Object reference
• Unique Type object
• Simple type string conversion
• Automatic use of ToString
• Bài giảng Photoshop
• Làm việc với Smart Object
• Cách sử dụng Filter
• Cách mở tấm hình dưới dạng Smart Object
• Chỉnh sửa đối tượng Smart Object
• Làm việc với các filter
• Object Oriented Data Modeling
• Data Modeling
• UML Language
• Object Oriented Modeling
• Object Modeling Example
• Tranform Class Diagram to Relational Database Schema
• Programming language
• Java programming language
• Sample object returning method
• Overloaded methods
• JFileChooser object
• Primitive data types
• String Tokenizer object
• Abstract classes
• Java program
• Object serialization
• Data hierarchy
• Sequential access text files
• Object oriented software engineering
• Software engineering
• Practical software development
• Object orientation
• Modeling with classes
• Object diagrams
• Inheritance hierarchies
• Variable declarations
• Object detection
• Recognition in digital images
• Object detection and tracking
• Object recognition
• Template based recognition
• Object Oriented Programing
• Lecture Object Oriented Programing
• Direct superclass
• Indirect superclass
• Effect polymorphism
• Demonstrating polymorphic behavior
• Class file
• Instance data values
• Class data value
• Software development
• C++ programming