TAILIEUCHUNG - Object Oriented Programming (21)

CSC241: Object Oriented Programming. Lecture No 23. 1 Previous Lecture.•. Example program. – Copy initialization. – Assignment operator overloaded.•. Memory efficient string class. 2 Today’s Lecture.•. Efficient string class. – Resolve problem while deleting String objects.•. Dynamic Type Information. 3 Cont•. It’s more efficient to create a new class to store. the count.•. Each object of this class, which we call strCount,. contains a count and also a pointer to the string. 4 Contmain() { void operator. String(). String(char*. String(String& s) ={ (String&. S) { S) {. {if(psc->count==1). psc. psc == new. new strCount(“\0”); }. String s3 = “hello psc. delete. strCount(s); = psc;. }; ~strCount(). world.”;. cout count)++; { delete[]. int length = strlen(s);. String }str =(psc->count)--;. new char[length+1];. str; }. psc = ;. s1;. s1 = strcpy(str, s);. (psc->count)++; Go to. count=1;. }. s3;<< “\ns1=”; ();.cout } program. String s2(s3); S2. S3 << “\ns2=”; (); *psc:. *psc: *psc:.} : :. Output strcount. count: 1. 2. 3 strcount. count: hello world. addr=7550 *str: *str:.s1= hello world. addr= hello world. addr=7550 hello world \0 5 Note.•. Why must the assignment operator in String. worry about deletion?. S2 S1 S3. *psc:7550 8750. *psc:7550 *psc:7550. 8750. : :. 7550 8750. strcount. count: 1 strcount. count:10. 21. *str: 650 *str: 975 650 hello world 975 Good. morning. S1 =. S3 =. S2;. S1; 6 Cont•. String object on th

• 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