COMP-206程序写作、辅导C/C++程序设计

” COMP-206程序写作、辅导C/C++程序设计School of Computer Science, McGill UniversityCOMP-206 Introduction to Software Systems, Winter 2020Mini Assignment 5: C Programming – File IODue Date Nov 17th, 23:55This is an individual assignment. You need to solve these questions on your own. If you havequestions, post them on Piazza, but do not post major parts of the assignment code. Though smallparts of code are acceptable, we do not want you sharing your solutions (or large parts of them) onPiazza. If your question Cannot be answered without sharing significant amounts of code, please makea private question on Piazza or utilize TA/Instructors office hours. Please ensure to check Mini 5general clarifications pinned post in Piazza before you post a new question. It might have beenalready clarified there if it is a popular question.Late penalty is -5% per day. Even if you are late only by a few minutes it will be rounded up toa day. Maximum of 2 late Days are allowed.You MUST use mimi.cs.mcgill.ca to create the solution to this assignment. You must not use yourMac command-line, Windows command-line, nor a Linux distro installed locally on your laptop. You can accessmimi.cs.mcgill.ca from your personal computer using ssh or putty as seen in class and in Lab A.DO NOT edit files on your laptop; use vim on mimi. If TAs are not able to compile your code onmimi as-is, you will get 0 points.Questions in this assignment require you to turn in one C program and one shell script. Instructors/TAs upontheir discretion may ask you to demonstrate/explain your solution. No points are awarded for commands thatdo not execute at all or programs that do not compile on mimi. (Commands/programs that execute/compile,but provide incorrect Behavior/output will be given partial marks.). All questions are graded proportionally. Thismeans that if 40% of the question is correct, you will receive 40% of the grade. Any exceptions are mentioned at theappropriate part of the problem description.Please read through the entire assignment before you start working on it. You can lose up to 3points for not following the instructions.Unless otherwise stated, all the names of the scripts and programs that you write, commands, options, inputarguments, etc. are case-sensitive.Total Points: 20Ex. 1 A Data Analytics Program(16 Points)As you saw in assignment 3, online platforms Can track users easily and study and analyze user behaviour. Suchdata analytics are also relevant with remote Delivery of exams. In this assignment, you will analyze an user event file(data.csv) for such an exam generated from mycourses (anonymised) to look for students who could have possiblycollaborated.The CSV file has a header, and as can be seen below, contains 6 fields in each line which details the user events. Thefields have consistent layout, And the file is structured in such a way that all the events related to a particular useris adjacent to each other (i.e. the events associated to a given user are always in contiguous lines in the file).User, Attempt, Date, Time, Event, IP AddressRaveena Mullen,1,Oct 9, 2020,4:54 AM,Quiz Entry,157.149.164.98Raveena Mullen,1,Oct 9, 2020,4:54 AM,Response to Question 1 Saved,157.149.164.981Raveena Mullen,1,Oct 9, 2020,4:55 AM,Response to Question 1 Saved,157.149.164.98…Orla Stout,1,Oct 9, 2020,6:49 AM,Response to Question 6 Saved,51.82.149.197Orla Stout,1,Oct 9, 2020,6:53 AM,Response to Question 6 Saved,51.82.149.197Orla Stout,1,Oct 9, 2020,6:53 AM,Response to Question 6 Saved,51.82.149.197…Hashir Palmer,1,Oct 9, 2020,4:51 AM,Response to Question 19 Saved,121.242.142.46Hashir Palmer,1,Oct 9, 2020,4:52 AM,Response to Question 19 Saved,121.242.142.46…One of the techniques to look for Collaboration in the above data is to analyze the IP address of the events. IPaddresses are good indicators of proximity. In this assignment, for simplification, we will define proximity as twousers sharing the same IP address. In other words, two students will be considered to have collaborated if they havethe same IP address. We will not go into the networking details of this data, as it is beyond the scope of this course- but consider COMP 535, COMP 512 if it piques your curiosity.You can make the following assumptions (use this to simplify your code logic).The maximum length of any line in the file will not exceed 200 characters.The maximum length of a users name will not exceed 100 characters.The maximum length of an IP address will not exceed 50 characters.A user will not be associated with more than one IP address.No two students have the same name.Events in the file are grouped by user. This means that all of users events will appear one after another in thefile. The CSV data file is not sorted though.You will write a program, report.c that accepts three arguments. csvfile, student name, reportfile,where csvfile is the name of the data file containing the events student name is the name of the studentwe are searching for and reportfile is a text file to which the names of the collaborators will be written.1.Use vim to create a C program source file report.c . All of your source code logic should be contained in thisfile. You may split your program logic across multiple functions if you would like to (recommended).2.(1 Points) The source code file should include a comment section at the beginning that describes its purpose(couple of lines), the author (your name), your department, a small history section indicating what changesyou did on what date. (Similar to the previous assignment). The code should be properly indented for readabilityas well as contain any additional comments required to understand the program logic.3.(1 Point) The source code Should be compilable by (exactly) using the command gcc -o report report.c4.(1 Point) Compilation should not produce any warnings!5.(1 Point) All error situations (described below) should result in error code 1 when the program terminatesand 0 otherwise. No points for this, if this requirement is violated even for any one test case.6.(1 Point) All the error messages (described below) should be printed to standard error. Again, no points forthis, if this is violated for any situation.7.(1 Point) Your program should accept the three arguments mentioned above. If the user does not pass sufficientarguments, or pass incorrect number of arguments, you should display an error message and terminate witherror.$ ./report data.csvUsage ./report csvfile student name reportfile$ echo $?1$8.(1 Point) Make sure that The data file can be read. If not, display an error message and terminate.$ ./report nosuchdata.csv Jane Doe rpt.txtError, unable to open csv file nosuchdata.csv$ echo $?21$9.(1 Point) Make sure that the user to search for is present in the data file. If not, display an error message andterminate.$ ./report data.csv Jane Doe rpt.txtError, unable to locate Jane Doe$ echo $?1$10.(1 Point) If all of the above checks have succeeded, then make sure that the output file can be created. If not,display an error message and terminate.$ ./report data.csv Markus Bender rpt.txtError, unable to open the output file rpt.txt$ echo $?1$11.(1 Point) If the program cannot find any collaborators for a given student, then simply write the followingcontents into the Output report file.$ ./report data.csv Markus Bender rpt.txt$ echo $?0$ cat rpt.txtNo collaborators found for Markus Bender$12.(1 Point) Your Program should work for both relative and absolute paths (for both the input CSV data fileand the output report file).13.(4 Points) If the program finds any collaborators for the student, then include their names in the output reportfile (one name per line).$ ./report data.csv Adaline Murphy rpt.txt$ echo $?0$ cat rpt.txtHuma FosterAbdullah Allen$Do not include the original student name, only the collaborators. The output student names in the report canbe in any order.14.(0 Points) Make sure that the output report file does not have any duplicate student names.(I.e., do not repeata student name in the output). -2 Points if any test case produces duplicates in the output.15.(1 Point) Make sure to overwrite any existing output report file if it already exists.16.(0 Points) If your program crashes/aborts for any test case due to bug in your logic, an additional -2 Pointswill be deducted.17.(0 Points) This exercises solution need to be completely implemented using a C Program. You may not useother Unix utilities like sed, awk, etc. Violating this will be an automatic 0. You are free to use any C libraryfunctions and header files that you need to work on this, subject to clause 3.3Ex. 2 A mini tester script(4 Points)There is no mini tester supplied With this assignment. Using the Unix scripting skills you have picked up so far, youcan write a simple mini tester, mini5tester.sh for your program.At a minimum you should include the above test cases (need not be exact, but similar in principle and objectives).Your tester does not have to automatically decide whether a test case is passed or failed, it just needs to provideenough output for a person who is running it to make that judgement without having to read code (like how theprogram was invoked, what did it produce, what was the return code of the program, etc.). You can look at the pastmini tester scripts for some inspiration, but it need not be very complicated and thorough. This script is not goingto be as rigorously evaluated as the C program.You can assume that the data.csv and the report.c files are in the current directory. You can also store the outputreport files in the same directory. Can you think of way you can still test for absolute and relative paths?HINTFor a basic solution, I suggest your separate out Your logic into different functions. For example there could be afunction to parse a character array containing a line in the log file and produce the name of the student and ip addressassociated with that line. Another function Can check if the students name exists in the data file. Yet anotherfunction can be used to go through the data file and produce the names of students who might have collaborated.You are not obliged to follow this approach.I also recommend that you explore the C library function strtok.A possible template to start your work, and divide the tasks into separate functions is given below. This is notyet a compilable Code. You can use this as your base if you would like to.struct logrecord{char name[100];char IPAddress[50];};struct logrecord readLog(char* logline){// parse a character array that Contains an line from the log// and return a structure that contains the fileds of interest to us.}bool checkNameExists(FILE* csvfile, char* name, char* ip){// Read through the CSV data file, keep looking for the name.// If found, store the IP Address associated with the name// to the variable ip and return success.// Is bool a valid data type in C? How do you indicate true/false concept in C?}bool findCollaborators(char* sname, char *sip, FILE* csvfile, FILE* rptfile){// Go through the CSV data file// look for collaborators of sname by looking for entries with the same ip as sip// if any collaborators are found, write it to the output report file.}int main(int argc, char* argv[]){// Do any basic checks, duct-tape your full program logic using the above functions,4// any house-keeping, etc.}WHAT TO HAND INTurn in the C program source code report.c, and the shell script mini5tester.sh named properly. You may zip/tarthe file if necessary. The file(s) must be uploaded to mycourses. DO NOT turn in the executable report. TAs willcompile your C program on their own as indicated in the problem descriptions above. If you zip/tar your submission,you are responsible to download your submission from mycourses and verify that it is not corrupted (happens whenstudents make an error in their zip/tar command). There will be no excuses for corrupted files.MISC. INFORMATIONThere is no tester script that is provided with the assignment, as you will be writing a simple one yourself. TAs willhave their own tester Script, however they will use the exact same data file, and same syntax for test cases as givenin the above examples. They may however, test using different names than the ones given in the above examples.** Important ** If your program hangs / is stuck while testing (should not take more than 30s for a giventest case) then you will loose points Associated with it – This is already very far from the time any reasonable programshould take to execute this task.FOOD FOR THOUGHT! Data analytics systems Often produce an output file that is more sophisticated than a simple text file (like aPDF, an image of a chart, etc.). Can your program check if the extension of the output file given as argumentis html and produce the output as an html file (write the names in an HTML table)? This is very easy toperform and do not require any extra libraries – you just need to play around with what you write to the outputfile and include the required HTML tags in it – try it!如有需要，请加QQ：99515681 或邮箱：99515681@qq.com

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