Principles of Procedural Programming Week 1and 2 SG Unit 1 pp. 1-33 TB. Chapter 3

General Outline Core of commercial application development projects Also used by event-driven systems and object- oriented platforms Where? Critical command content – objects, events, listeners Many languages We’ll explore underpinnings

4 Main Sections in Outline LO1: Principles [Unit 1] LO2: Design [Unit 2] LO3: Implement [Unit 3] LO4: Test [Unit 4]

Principles LO1: Understand the principles of procedural programming Discuss the principles Discuss the characteristics Discuss the features of procedural programming

Design LO2: Be able to design procedural programming solutions Identify the program units and data and file structures required to implement a given design Design a procedural programming solution for a given problem

Implement LO3: Be able to implement procedural programming solutions Select and implement control structures to meet the design algorithms Correctly use parameter passing mechanisms Implement a procedural programming solution based on a prepared design

Test (1) LO4: Be able to test procedural programming solutions Critically review and test a procedural programming solution Analyse actual test results against expected results to identify discrepancies

Test (2) Evaluate independent feedback on a developed procedural program solution and make recommendations for improvements Create onscreen help to assist the users of a computer program Create documentation for the support and maintenance of a computer program

Now let’s get started with LO1: The Principles Characteristics of programming Types of languages Reasons for choice Data structures Data types Programming syntax and standards

1 Characteristics of Programming p.17 Low-level languages High-level languages Generations, e.g. 1st, 2nd, 3rd, 4th, 5th Programs Applications Instructions Algorithms

2 Types of languages p.21 Procedural languages Object-oriented Event-driven Others e.g. script and mark-up languages Simple overviews and uses

3 Reasons for choice p. 22 Organisational policy Suitability of features and tools Availability of trained staff Reliability Development and maintenance costs Expandability

4 Data Structures Variables, e.g. naming conventions, local and global variables, arrays (one-dimensional, two-dimensional) File structures; loops, e.g. conditional (pre-check, post- check, break-points), fixed Conditional statements; Case statements Logical operators Assignment statements Input statements Output statements

5 Data Types p. 23 Constants and literals Integer Floating point Byte Date Boolean Others e.g. character, string, small int Choice of data types, e.g. additional validation, efficiency of storage

6 Programming Syntax and Standards p. 25 Command rules Variable declaration Use of comments Code layout Indentation

Test Your Knowledge p. 33 In your own words, discuss the reasons behind the choice of language What is the main difference between OOP and event-driven programming? Distinguish between high and low-level programming languages and give examples of each

Resources Study Guide – links to Gaddis (2003) Gaddis, T. 2013. Starting out with programming logic and design. 3rd edition http://www.cplusplus.com/doc/tutorial/ http://www.cprogramming.com/ [Notice the 2 languages: C++ and C]  homework!