7.12 Write a program that simulates the control software for a "people mover" system, a set of driverless trains that move in two concentric circular tracks. A set of switches allows trains to switch tracks. In your program, the outer and inner tracks should each be divided into ten segments. Each track segment can contain a train that moves either clockwise or counterclockwise. A train moves to an adjacent segment in its track or, if that segment is occupied, to the adjacent segment in the other track. Define a Segment structure. Each segment has a pointer to the next and previous segments in its track, a pointer to the next and previous segments in the other track, and a train indicator that is 0 (empty), +1 (train moving clockwise), or -1 (train moving counterclockwise). Populate the system with four trains at random segments, two in each direction. Display the tracks and trains in each step, like this: OTexPhoto/Stockphota |x X The two rectangles indicate the tracks. Each switch that allows a train to switch between the outer and inner track is indicated by an x. Each train is drawn as a > or <, indicating its current direction. Your program should show fifty rounds. In each round, all trains move once.

7.12 Write a program that simulates the control software for a "people mover" system, a set of driverless trains that move in two concentric circular tracks. A set of switches allows trains to switch tracks. In your program, the outer and inner tracks should each be divided into ten segments. Each track segment can contain a train that moves either clockwise or counterclockwise. A train moves to an adjacent segment in its track or, if that segment is occupied, to the adjacent segment in the other track. Define a Segment structure. Each segment has a pointer to the next and previous segments in its track, a pointer to the next and previous segments in the other track, and a train indicator that is 0 (empty), +1 (train moving clockwise), or -1 (train moving counterclockwise). Populate the system with four trains at random segments, two in each direction. Display the tracks and trains in each step, like this: OTexPhoto/Stockphota |x X The two rectangles indicate the tracks. Each switch that allows a train to switch between the outer and inner track is indicated by an x. Each train is drawn as a > or <, indicating its current direction. Your program should show fifty rounds. In each round, all trains move once.

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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7.12 Write a program that simulates the control software for a "people mover" system, a set of driverless trains that move in two concentric circular tracks. A set of switches
allows trains to switch tracks.
In your program, the outer and inner tracks should each be divided into ten segments. Each track segment can contain a train that
moves either clockwise or counterclockwise. A train moves to an adjacent segment in its track or, if that segment is occupied, to the
adjacent segment in the other track.
Define a Segment structure. Each segment has a pointer to the next and previous segments in its track, a pointer to the next and
previous segments in the other track, and a train indicator that is 0 (empty), +1 (train moving clockwise), or -1 (train moving
counterclockwise). Populate the system with four trains at random segments, two in each direction. Display the tracks and trains in
each step, like this:
OTexPhoto/iStockphoto.
X X
x x x x
The two rectangles indicate the tracks. Each switch that allows a train to switch between the outer and inner track is indicated by an x. Each train is drawn as a > or <,
indicating its current direction. Your program should show fifty rounds. In each round, all trains move once.
61°F
12:36 AM
ENG
Sunny
3/14/2022
...
II

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