G50PRO
University of Nottingham
Unit 3 : Introduction To Scratch 2
Paul Tennent http://paultennent.wordpress.com/G50PRO.html
paul.tennent@nottingham.ac.uk
Room C41

Agenda
 Common programming elements
 Pseudo Code
 Scratch Example
 Scratch Demo
 Course work

Common programming elements:
 Variables
 Conditional statements
 Loops
 Events

PseudoCode
 PseudoCode is a compact and informal high-level description of a computer program
 Uses the structural conventions of a programming language
 Intended for human reading rather than machine reading
 Compact and easier to understand fo humans
 Language-independent

Example
 Cat Sprite()
 Loop Forever


If (user hits right)
Point right





If (user hits left)
Point Left

If (user hits up)
Point Up

If (user hits down)
Point Down
Move slowly

Try PseudoCode
 Write PseudoCode to:
 Move a car using up arrow to increase speed and down arrow to brake. Right and left arrows for directions.
 If a wall is hit the car explodes and the car losses
1 life out of 3
 Game is over if the car explodes 3 times

Who is responsible for what?
 Structure your programs
 Think – which sprites should be responsible for what actions?
 Think – Where should your variables be defined

Example – Shooting Game
Bullet
Add to user ’ s score?
-Disappear
Alien
-Destruction effect

Coursework
 2 player car race online game
 The game should offer a choice of multiple tracks.
 When a player reaches the finish line the winner should be announced plus the time taken and a score.
 Read the specifications on course web page

Coursework
 Check Similar projects online first
 It is ok to reuse bits of code/ideas from other projects. Yet DO NOT copy a project and modify it.
 Make sure to include in the Report references to other projects you used in your work on
 Use Project notes to include simple user
Instructions

Quick Review
 Create the software



Design
Implement
Test
 Write the documentation


Leave plenty of time to write the report
Proof read for obvious mistakes
 Think about the structure of your writing

Software Demonstration
 Wednesday 18 th February
 Make sure The game is usable online (clear instructions)
 How does it look, feel?