Ch1 principles of software development

CHAPTER 1 PRINCIPLE OF SOFTWARE DEVELOPMENT

Objectives ,[object Object],[object Object],[object Object],[object Object]

SOFTWARE DEVELOPMENT PRICIPLE ,[object Object],[object Object],[object Object],[object Object]

1.1 Intro to Programming ,[object Object],[object Object]

1.2 Problem Statement & SDA ,[object Object],[object Object]

Software Development Method ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Software Development Method ,[object Object],[object Object],[object Object]

Software Development Method ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Logic/Design errors ,[object Object],[object Object],[object Object],[object Object]

Syntax Errors ,[object Object],[object Object],[object Object],[object Object]

Runtime Errors ,[object Object],[object Object],[object Object],[object Object]

Software Development Method ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

1.3 Algorithm Representation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Analogy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Pseudocoding ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example of Pseudocode ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Flowchart Symbols Indicates a decision point in the algorithm Decision Indicates computation or data manipulation Process Indicates an Input or Output operation Input/Output Indicates the beginning or end of an algorithm Terminal Description And Example Name Of Symbol Symbol

Flowchart Symbols Description And Example Name Of Symbol Symbol Provides continuation of a logical path on another page Off-Page Connector Provides continuation of a logical path on another point in the same page. On-Page Connector Used to connect the symbols and indicates the logic flow Flow Lines/ Arrow Specific for for statement Indicates the initial, final and increment values of a loop. Loop

Example of Flowchart Problem 1 : (Sequence statements) Compute total of resistor values.

Pseudocode & Flowchart Convention ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Sequence Structure begin Statement_1 Statement_2 … Statement_n end

Selection Structure ,[object Object],if condition statement if condition then_part else else_part end_if ,[object Object],statement condition

Repetition Structure while condition loop-body end_while

Applying the SDM ( Phase 1 to 3) ,[object Object],[object Object]

Applying the SDM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Applying the SDM ,[object Object],[object Object],Begin Read the test scores Begin while while test_score < 0 Print ‘ Re-enter your score and must greater than 0’ Read the test_score End while if test_score >= 50 print ‘PASS’ else print ‘FAIL’ End

Applying the SDM ,[object Object]

Exercise ,[object Object],[object Object]

Ch1 principles of software development

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Ch1 principles of software development