CHAPTER 1 OBJECT ORIENTED NOTES SLIDE PRESENTATION
- 1. 1BY THEISA
- 2. Reasons for Studying Concepts of Object Oriented Programming Languages Increased capacity to express ideas Improved background for choosing appropriate languages Increased ability to learn new languages Better understanding of the significance of implementation Overall advancement of computing
- 3. What is object- oriented programming? 1 is a rganizes s, rather can be ttributes s want to manipulate suited for y updated ams for s mobile ng system 2
- 4. A Brief History of Programming Languages * Several hundred programming languages and dialects have been developed since that time. * Most have had a limited life span and utility, while a few have enjoyed widespread success in one or more application domains. * Many have played an important role in influencing the design of future languages.
- 7. BUSINESS APPLICATIONS The systems include an organization’s payroll system, accounting system, online sales and marketing systems, inventory and manufacturing systems SYSTEMS PROGRAMMING The paradigms that are used include imperative, parallel, and event-driven. ARTIFICIAL INTELLIGENCE This programming community is concerned about developing programs that model human intelligent behavior, logical deduction, and cognition. SCIENTIFIC COMPUTING Scientific programming is primarily concerned with making complex calculations very fast and very accurately. WEB SOFTWARE The most dynamic area of new programming community growth is the World Wide Web – for electronic commerce, government, industry, academic Application Domains/ Programming Domains
- 8. Language Evaluation Criteria READABILITY One of the most important criteria for judging a programming language is the ease with which programs can be read and understood. must be considered in the context of problem domain. Writability is a measure of how easily a language can be used to create programs for a chosen problem domain. WRITABILITY RELIABILITY A program is said to be reliable if it performs to its specifications under all conditions. The ultimate total cost of a programming language is a function of many of its characteristics. First is the cost of training programmers to use the language. COST
- 9. 01 02 03 04 The language that compiler translates is called the source language. The process of compilation and program execution takes place in several phases The lexical analyzer gathers the characters of the source program into lexical units. The lexical units of a program are identifiers, special words, operators, and punctuation symbols. The syntax analyzer takes the lexical units from the lexical analyzer and uses them to construct hierarchical structures called parse trees. The intermediate code generator produces a program in a different language, at an intermediate level between the source program and the final output of the compiler, the machine language program. COMPILATION PROCESS
- 10. 04 05 06 07 The semantic analyzer is an integral part of the intermediate code generator. The semantic analyzer checks for errors that are difficult if not impossible to detect during syntax analysis, such as type errors. Optimization, which improves programs (usually in their intermediate code version) by making them smaller or faster or both, is often an optional part of compilation. The code generator translates the optimized intermediate code version of the program into an equivalent machine language program. The symbol table serves as a database for the compilation process. The primary contents of the symbol table are the type and attribute information of each user-defined name in the program. COMPILATION PROCESS