SLIDE 1
First Questions
- What is this course all about?
- Why am I taking it?
- How much computer experience do I need?
- Why Java (and what is Java anyway)?
Structured Problem-Solving Using the Computer ITK 168 Fall, 2012 - - PowerPoint PPT Presentation
Structured Problem-Solving Using the Computer ITK 168 Fall, 2012 - - PowerPoint PPT Presentation
Structured Problem-Solving Using the Computer ITK 168 Fall, 2012 First Questions What is this course all about? Why am I taking it? How much computer experience do I need? Why Java (and what is Java anyway)? Syllabus Assignment
SLIDE 2
SLIDE 3
Syllabus
SLIDE 4
Assignment for Thursday
- Read chapter 1 of your text
- Prepare for an in-class quiz over the syllabus
and chapter 1
SLIDE 5
By Next Tuesday
- Turn in completed student questionnaire
- Send email to mecaliff@ilstu.edu from your
preferred email address. Include your name, ITK 168, and your lecture section.
SLIDE 6
Your Questions
SLIDE 7
What is a computer?
SLIDE 8
Parts of a Computer
SLIDE 9
Parts of a Computer
- CPU (Central Processing Unit)
- Main Memory (often called RAM)
- Secondary Storage
- Input
- Output
SLIDE 10
Computer Memory
- Sequence of addresses
- Important memory terms:
– bit – byte – word
- Addressing the computer
– What’s the difference between 32-bit and 64-bit?
SLIDE 11
What can a computer do?
SLIDE 12
What can a computer do?
- Simple arithmetic
- Move data
- Compare two numbers (and move data based
- n the result of the comparison)
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How do we do cool stuff?
SLIDE 14
Software
- System software
- Application software
SLIDE 15
The Process
- 1. Understand the problem
- 2. Figure out the interface (input and output)
- 3. Make a plan
- 4. Check the plan
- 5. Translate the plan into Java (or other)
- 6. Fix compile-time errors
- 7. Run the program
- 8. Fix run-time errors
- 9. Make sure it works correctly
SLIDE 16
Errors
- Syntax or compile-time
- Run-time
- Logic or intent
SLIDE 17
Making the Plan
- Algorithms
- Pseudocode
– English – Formatted like computer program code
SLIDE 18
Terminology
- Algorithm ≠ Pseudocode
- Algorithms are often written in pseudocode,
but your Java program is also a representation
- f an algorithm.
- On the other hand, when I ask you to submit
an algorithm, it MUST be written in pseudocode.
SLIDE 19
Precision/Detail
- How precise and detailed does an algorithm
have to be?
- Just exactly how dumb is a computer?
SLIDE 20
Writing for an Audience
- When you write a computer program, you have
two audiences.
- What are they?
SLIDE 21
Demo
- Let’s look at an actual computer program in