Scenario: A robot is sitting in a chair with its arms facing down. Write an algo

Question

Scenario: A robot is sitting in a chair with its arms facing down. Write an algorithm, using pseudocode, to make the robot:

stand up

walk until it senses a wall

turn around

walk back to the chair

sit back down in the origin starting position

Finally, output the total number of steps taken.

Commands:

In addition to our standard pseudocode commands, you must also use the following robot control commands:

sit

stand

step (one step forward)

raise arms (parallel to floor)

lower arms (pointing to floor)

sense (only if arms are raised)

turn (90 degrees right)

Immediately after issuing a sense command, you can check whether the robot is at the wall as follows:

if at wall or alternatively if not at wall

You should use comments, sequence, comparison, iterative instructions in this project.

Assumptions
You must assume the following facts:

The robot's initial sitting position is directly facing the target wall.

There are no obstacles between the robot and the wall.

The wall is 1 or more exact steps from the chair.

The wall is sensed when it is less than 1 step from the robot's arms.

The length of the robot's arms are slightly less than the length of 1 step.

Your solution
Your solution must include all of the following:

Adequate comments

Initialization and use of at least one variable

Sequential flow of control

Conditional flow of control

Iterative flow of control

Handling of any special cases

Output of the total number of steps taken

NOTE: Please write the algorithm for this senario while following the instructions given. Remeber to output the total number of steps taken by the robot.

Explanation / Answer

start

            stand up

            while sense a wall is not true

                        walk

raise arms

                        increment steps

            end while

            turn 90 degree right

            turn 90 degree right

            lower arms

while until back to chair is not true

            walk

increment steps

            end while

            sit down

output number of steps

end

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