代做COMP9024、代写c/c++编程设计

日期：2023-11-02 09:56

COMP9024 23T3

TripView

Change Log

We may make minor changes to the spec to address/clarify some outstanding issues. These may

require minimal changes in your design/code, if at all. Students are strongly encouraged to check the

change log regularly.

Version 1: Released on 20 October 2023

Objectives

The assignment aims to give you more independent, self-directed practice with

advanced data structures, especially graphs

graph algorithms

asymptotic runtime analysis

Admin

Marks 3 marks for stage 1 (correctness)

5 marks for stage 2 (correctness)

2 marks for stage 3 (correctness)

1 mark for complexity analysis

1 mark for style

———————

Total: 12 marks

Due 5:00:00pm on Monday 13 November (week 10)

Late 5% penalty per day late

(e.g. if you are 25 hours late, your mark will be reduced by 10%)

Aim

The objective is to write a program tripView.c that generates an optimal trip on (a part of) Sydney's

railway network based on user preferences.

Input

Railway stations

The first input to your program consists of an integer n > 0, indicating the number of railway stations on

the network, followed by n*2 lines of the form:

railway-station

transfer-time

where the first line is the name of a station and the second line denotes the time – in minutes – it takes

to transfer to a different train at that station.

Here is an example:

prompt$ ./tripView

Size of network: 3

HarrisPark

1

TownHall

3

NorthSydney

2

You may assume that:

The input is syntactically correct.

The maximum length (strlen()) of the name of a railway station is 16 and will not use any

spaces.

The transfer time will be a positive integer.

No name will be input more than once.

Hint:

To read a single line with a station name you should use:

scanf("%s", name);

where name is a string, i.e. an array of chars.

Timetables

The next input to your program is an integer m > 0, indicating the number of trains on any day, followed

by m timetables. Each timetable starts with the number s > 1 of stops followed by s*2 lines of the form:

station

hhmm

meaning that you can get on or off the train at that station at the given time (hh – hour, mm – minute).

Here is an example:

Number of timetables: 2

Number of stops: 3

HarrisPark

0945

TownHall

1020

NorthSydney

1035

Number of stops: 2

TownHall

1024

NorthSydney

1033

You may assume that:

The input is syntactically correct.

All times are given as 4 digits and are valid, ranging from 0000 to 2359.

Only train stations that have been input earlier as part of the network will be used.

The stops are input in the correct temporal order.

All trains reach their final stop before midnight.

Trip View

The final input to your program are user queries:

From: HarrisPark

To: NorthSydney

Arrive at or before: 1200

As before, you may assume that the input is correct: Two different valid railway stations followed by a

valid time in the form of 4 digits.

Your program should terminate when the user enters "done" when prompted with From:

From: done

Bye

prompt$

Stage 1 (3 marks)

Stage 1 requires you to generate a suitable data structure from the input.

Test cases for this stage will only use queries FromStation, ToStation, ArrivalTime such

that:

there exists one, and only one, train that travels from FromStation to ToStation ;

this train arrives on, or before, the given ArrivalTime ; and

this train is the desired output for the query.

Therefore, at this stage all you need to do is find and output the connection between the two train

stations, including all the stops along the way and the arrival/departure times.

Here is an example to demonstrate the expected behaviour of your program for a stage 1 test:

prompt$ ./tripView

Size of network: 7

Ashfield

5

Central

8

HarrisPark

1

MilsonsPoint

2

NorthSydney

2

Redfern

5

TownHall

3

Number of timetables: 2

Number of stops: 5

HarrisPark

0945

Ashfield

0955

Redfern

1006

TownHall

1020

NorthSydney

1035

Number of stops: 4

Redfern

1359

Central

1406

TownHall

1410

MilsonsPoint

1430

From: Central

To: MilsonsPoint

Arrive at or before: 1600

1406 Central

1410 TownHall

1430 MilsonsPoint

From: Ashfield

To: NorthSydney

Arrive at or before: 1040

0955 Ashfield

1006 Redfern

1020 TownHall

1035 NorthSydney

From: done

Bye

prompt$

Stage 2 (5 marks)

For the next stage, your program should find and output a connection from FromStation to

ToStation that:

may involve one or more train changes;

arrives at ToStation no later than ArrivalTime ; and

leaves as late as possible.

Note that you can get onto a different train at any station, but it is necessary to take into account the

time it takes to change trains at that station.

In all test scenarios for this stage there will be at most one connection that satisfies all requirements.

Here is an example to demonstrate the expected behaviour of your program for stage 2:

prompt$ ./tripView

Size of network: 6

Ashfield

5

Central

8

HarrisPark

1

NorthSydney

2

Redfern

5

TownHall

3

Number of timetables: 2

Number of stops: 5

HarrisPark

0945

Ashfield

0955

Redfern

1006

TownHall

1020

NorthSydney

1035

Number of stops: 3

HarrisPark

0950

Central

1010

TownHall

1017

From: HarrisPark

To: NorthSydney

Arrive at or before: 1040

0950 HarrisPark

1010 Central

1017 TownHall

Change at TownHall

1020 TownHall

1035 NorthSydney

From: done

Bye

prompt$

If there is no connection that satisfies the requirements, then the output should be: No

connection.

From: HarrisPark

To: TownHall

Arrive by: 1015

No connection.

Stage 3 (2 marks)

For the final stage, if there are multiple possible connections with the same latest departure time, your

program should take into account the additional user preference that:

among all the connections with the latest possible departure time, choose the one with the

shortest overall travel time.

You may assume that there will never be more than one connection with the latest possible departure

time and the shortest overall travel time. Note also that travel time includes the time it takes to change

trains and the waiting time if applicable.

Here is an example to demonstrate the expected behaviour of your program for stage 3:

prompt$ ./tripView

Size of network: 3

HarrisPark

1

NorthSydney

2

TownHall

3

Number of timetables: 2

Number of stops: 3

HarrisPark

0945

TownHall

1020

NorthSydney

1035

Number of stops: 2

TownHall

1024

NorthSydney

1033

From: HarrisPark

To: NorthSydney

Arrive at or before: 1040

0945 HarrisPark

1020 TownHall

Change at TownHall

1024 TownHall

1033 NorthSydney

From: done

Bye

prompt$

Complexity Analysis (1 mark)

You should include a time complexity analysis for the asymptotic worst-case running time of your

program, in Big-Oh notation, depending on the size of the input:

1. the size of the network, n

2. the number of timetables, m

3. the maximum number of stops on any one timetable, s.

Hints

If you find any of the following ADTs from the lectures useful, then you can, and indeed are encouraged

to, use them with your program:

linked list ADT : list.h, list.c

stack ADT : stack.h, stack.c

queue ADT : queue.h, queue.c

priority queue ADT : PQueue.h, PQueue.c

graph ADT : Graph.h, Graph.c

weighted graph ADT : WGraph.h, WGraph.c

You are free to modify any of the six ADTs for the purpose of the assignment (but without

changing the file names). If your program is using one or more of these ADTs, you should submit both

the header and implementation file, even if you have not changed them.

Your main program file tripView.c should start with a comment: /* … */ that contains the time

complexity of your program in Big-Oh notation, together with a short explanation.

Testing

We have created a script that can automatically test your program. To run this test you can execute the

dryrun program that corresponds to this assignment. It expects to find, in the current directory, the

program tripView.c and any of the admissible ADTs

(Graph,WGraph,stack,queue,PQueue,list) that your program is using, even if you use them

unchanged. You can use dryrun as follows:

prompt$ 9024 dryrun tripView

Please note: Passing dryrun does not guarantee that your program is correct. You should thoroughly

test your program with your own test cases.

Submit

For this project you will need to submit a file named tripView.c and, optionally, any of the ADTs

named Graph,WGraph,stack,queue,PQueue,list that your program is using, even if you

have not changed them. You can either submit through WebCMS3 or use a command line. For

example, if your program uses the Graph ADT and the queue ADT, then you should submit:

prompt$ give cs9024 assn tripView.c Graph.h Graph.c queue.h queue.c

Do not forget to add the time complexity to your main source code file tripView.c.

You can submit as many times as you like — later submissions will overwrite earlier ones. You can

check that your submission has been received on WebCMS3 or by using the following command:

prompt$ 9024 classrun -check assn

Marking

This project will be marked on functionality in the first instance, so it is very important that the output of

your program be exactly correct as shown in the examples above. Submissions which score very low

on the automarking will be looked at by a human and may receive a few marks, provided the code is

well-structured and commented.

Programs that generate compilation errors will receive a very low mark, no matter what other virtues

they may have. In general, a program that attempts a substantial part of the job and does that part

correctly will receive more marks than one attempting to do the entire job but with many errors.

Style considerations include:

Readability

Structured programming

Good commenting

Plagiarism

Group submissions will not be allowed. Your programs must be entirely your own work. Plagiarism

detection software will be used to compare all submissions pairwise (including submissions for similar

assessments in previous years, if applicable) and serious penalties will be applied, including an entry on

UNSW's plagiarism register.

You are not permitted to use code generated with the help of automatic tools such as GitHub Pilot,

ChatGPT, Google Bard.

Do not copy ideas or code from others