This assignment requires pseudocode. You may use only actions provided in the as

Question

This assignment requires pseudocode.

You may use only actions provided in the assignment:

move forward 1 unit,

turn left,

turn right.

sense the ground green or red.

You may indicate repeating any one or multiple actions above.

Note, if condition doesn't automatically repeat anything, it is a one time matter.

To repeat actions under certain condition, use Repeat when ... (Repeat if ...)

Note, move left (or move right) is not provided. To move left, 2 steps are involved: turn left, move forward.

Write an algorithm that allows a robot to mow a rectangular lawn, provided it has been placed in a corner, like this: The robot (marked as R) can: Move forward by one unit. Turn left or right. Sense the color of the ground one unit in front of it.

Explanation / Answer

The algorithm is as follows:

Repeat :
    Repeat till sense a red colour
         Move forward by one unit
    turn right
    move forward by one unit
    turn right
    sense the colour
        if red
           break from the loop
    Repeat till sense a red colour
         Move forward by one unit
    turn left
    move forward by one unit
    turn left
    sense the colour
        if red
           break from the loop   

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