Answered: The following program moves a robot in…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

The following program moves a robot in a grid of squares. The initial position and direction of the robot is shown below. Click on the grid to move the robot to the final position after the program is run. You must click within the box to rotate the robot to the correct final direction (click near the top of the box to rotate up, etc...) Feel free to move the robot along as you follow the code.

PROCEDURE DoSomething(a)
{
MOVE_FORWARD()
if( a > 2 )
{
MOVE_FORWARD()
}
else
{
if( a = 3 )
{
MOVE_FORWARD()
}
}
MOVE_FORWARD()
}

i ⬅ 3
ROTATE_RIGHT()
REPEAT 2 TIMES
{
DoSomething(i)
MOVE_FORWARD()
ROTATE_RIGHT()
i ⬅ i - 1
}

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PROCEDURE DoSomething (a)
{
}
MOVE_FORWARD ()
if( a > 2 )
{
}
MOVE_FORWARD ()
}
else
{
if( a = 3 )
{
MOVE_FORWARD ()
MOVE_FORWARD ()
1 - 3
ROTATE_RIGHT()
REPEAT 2 TIMES
{
DoSomething (i)
MOVE_FORWARD()
ROTATE_RIGHT()
i-i-1

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