Formal performers

Содержание и основные понятия

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Alterna chapter 32
Formal performers
From command to new state: follow steps, find a fail and prove that the algorithm solves the problem.
The formal performer does not understand the author ' s intent. For each step, the environment, current status and command system are known.
refusal
.
substance and practice
Grade 8 - 9
Practical Chapter
ALT
Robot Alt mission
First you try the arrow before you start and you see the formal fail, then you launch the mission: there's a route of exactly seven teams to the target.
Field 5 × 4
Commands: 0 · minimum: 7
Status
Mission not initiated
Press the arrow to Start to check the applicability of the command.
01
Formal Implementing Model
Wednesday
Field, walls, plane
+
Status
Position, heading, pen
+
SCI
Acceptable Commands
→
The result of the step
new state or refusal
The perpetrator
The object that executes the commands literally. The author of the algorithm selects the command, the performer doesn't know.
Command system
SCI sets acceptable commands, parameters and exact meaning for each operation.
Applicability
Before action, check whether the transition is permitted in the current environment.
Post-condition
The absence of a refusal is not yet a success: the objective of the task must be achieved after completion.
02
First launch
The robot is in the central upper cage, on the right, the red wall, and you're gonna do the "right" team, and then you'll see the formal result.
Command:
вправо
The perpetrator will verify the applicability of the command prior to the change of state.
Press "Fail Command."
03
Headway
32.1. Environment and direct commands
Robot
The walls on the ribs of the cells, the target, the paint, the syntax error, the logical error, and the first failure.
32.2. Common algorithm
Cycles and conditions
School algorithmic language in Ku Mir, environment sensors, ts... cz if... all the hidden test environments.
32.3. coordinate plane
Turtle
Precise coordinates, mathematical course, pen, repeats, polygons and auto-scales.
32.4. securing
Workshop
Ten questions from the bank: one attempt, immediate review and reproducible ID.
32.5. Monitoring
Skills testing
Eight minutes, four options and visual tasks without giving us a clue as to whether it's correct until the end.
04
Relationship to examinations
The chapter develops basic skills, but the thematic diagnostics are not called the full version of the EEG or EGE.
OGE No. 15 · Framework
Robot program
Environment conditions, cycles, paintings and a programme operating in all permissible positions.
EGE No. 6 · Framework
Turtle algorithm
Coordinates, repeats, closed figures, and an analysis of the result on the plane.
EEG No. 5 / EEG no. 5 · bridge
Formal execution
The chain of command and the restoration of the reference value are moving to numerical machines.
practice
Practical work
Hand and computer execution, record transformation, algorithm development and defusing.
05
Border of Chapter
What's next
Here, the commands belong to a fixed performer. Changed, types, inputs, functions and programmes of general purpose start in the following programming chapters.