2019 Spring CSCI3150 – Bonus1Deadline: April 25, 2019 11:00AMContents1 Introduction 31.1 The database file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.2 Example usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Your assignment 82.1 Git Classroom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.2 The assignment package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.3 Remarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.3.1 run.sh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.3.2 grader.sh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.3.3 Run it locally . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.4 To begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92.5 Your job . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.6 Submitting your assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 Grading 104 Change Log 1015 Questions 116 Academic Honesty 117 General Notes 1121 IntroductionIn this assignment, you are going to write shell scripts to simulate a course registrationsystem. We assume that this system stores the registration records in a CSV file. Figure 1shows a sample file:Figure 1: The sample database file.The main shell script is run.sh. The syntax for running it is:./run.sh [operation type] [input parameter]The 4 possible operations are as follows, and the “input parameter” is the informationcorresponds to the chosen operation:operation type Operation1 List all the courses a given student registered.2 List the total numbers of students who registered a given set ofcourses.3 Insert a registration record.4 Delete a registration record.1.1 The database fileIt is in .csv format, with “,” as the delimiter. It has four fields and no space between.Field FormatStudent ID 10 digitsName One word without spaceCourse ID 4 characters followed by 4-digits (no space).Course Name A string31.2 Example usageAssume that the current database file is as Figure 1.Operation 1. List all the courses a given student registered./run.sh 1 [Student ID]Examples:Input1 ./run.sh 1 1155073100Output1Introduction to Operating SystemsIntroduction to Database SystemsInput2 ./run.sh 1 2255073100Output2Notes and Assumptions:1. Output: Each course name is in a separated line without any leading or trailing whitespace.2. Output: The course names should follow the order as in the database file, i.e,the system should first output “Introduction to Operating Systems” and then output“Introduction to Database Systems”.3. Output: If a student id is not found, output empty (output nothing).4. The input format is always correct (it contains ten digits), but it is not necessary foran input student ID exists in the database file.Operation 2. List the total numbers of students who registered a given set ofcourses../run.sh 2 [CourseID1 CourseID2 ...]Examples:4Input ./run.sh 2 CSCI3150 CSCI4190 CSCI1100Notes and Assumptions:1. Output: Output 0 if a particular course ID doesn’t exist.2. Output: Output each number in a single line without any leading and trailing whitespace.3. Output: each output line corresponds to the total number of students who register thegiven course, which are CSCI3150, CSCI4190 and CSCI1100, respectively. Because thecourse CSCI1100 does not appear in the database file, the last output line is 0. Theoutput order shall follow the input order of the course IDs.4. We always input at least one course ID.5. The course ID format is always correct.Operation 3. Insert a registration record./run.sh 3 [StudentID Name CourseID ‘‘CourseName’’]Examples:Input ./run.sh 3 1155073104 Jim CSCI4190 “Introduction To Social Networks”OutputThe total number of records is:7Notes and Assumptions:1. Output: 2 lines – the 1st line is the description “The total number of records is:” andthe 2nd line is the total number of records after the insertion.5Figure 2: The database file after the insert operation.2. We insert one record in each operation.3. The grammar is correct, i.e., the input record always includes the correct format.4. The inserted record has not been existed in the database file yet.5. The four fields are separated by spaces ( ). Use double quotes(“”) to quote the CourseNamestring.6. The inserted record should be appended as the last line of the database file.7. The database file after this example operation is shown in Figure 2.Operation 4. Delete a registration record./run.sh 4 [StudentID CourseID]or./run.sh 4 [CourseID StudentID]Examples:Input1 ./run.sh 4 1155073100 CSCI3150Output1The total number of records is:6Input2 ./run.sh 4 CSCI3170 1155073102Output1The total number of records is:56Figure 3: The sample database file after the delete operation with input1.Figure 4: The sample database file after the delete operation with input2.Notes and Assumptions:1. Output: 2 lines – the 1st line is the description “The total number of records is:” andthe 2nd line is the total number of records left after the deletion.2. The course id and the student id must be interchangeable.3. We delete one record in each operation.4. The grammar is correct, i.e., the input format is correct.5. The deleted record is always in the database file.6. You might need to remove empty lines in your database file, if any.7. If the original database file is Figure 2, then after input1, the database file should beFigure 3. And similarly, the database file should be Figure 4 after input2.72 Your assignment2.1 Git ClassroomYou should have opened a GitHub account and let us know your GitHub account and yourstudent ID in previous assignment . So, after logging in your Github account, come herehttps://classroom.github.com/a/M_wr4nTf to get a new repo for this assignment. Thenew repo should contain the starter package for this assignment.Warning: DON’T change the names. Otherwise, you will get 0 marks.2.2 The assignment packageFollow the steps in section 2, you can get a local copy of the repo to your desired directory.You are given the following files:Name Description/run.sh The main script (Don’t touch)./listDatabase.sh Script to print the database file when automaticallygrading (Don’t touch)./listCourses.sh Script to achieve Operation 1 (Work on it)/listNumbers.sh Script to achieve Operation 2 (Work on it)/insert.sh Script to achieve Operation 3 (Work on it)/delete.sh Script to achieve Operation 4 (Work on it)/testcases/data/ Test data./testcases/expected/ Expected output/grader.sh You can run this script to check your results(Don’t touch)2.3 Remarks2.3.1 run.shThe main script. Given to step you through the exercise. Don’t modify this file.81. It parses the operation type and invokes the corresponding shell file based on theoperation type chosen by the user.2. It also passes the arguments to your functions.3. It saves the database file path into the ENV variable $DATABASE.4. There is a call to “listDatabase” operation for operation types 3 and 4. Ignore them— that is solely for auto-grading purpose.2.3.2 grader.shIt contains 10 test cases and it will match your output with our expected output.2.3.3 Run it locallyYou are encouraged to work on our VM on a newly created local directory. If you have notgotten the VM, please follow the steps in Lab 1 to setup the VM on your own computer.Especially, if you transfer the files from your host to your VM through a shared folder, don’twork on the shared folder directly because it may cause some permission access problems.2.4 To beginTo avoid any permission problem, you need to make sure all files are editable. Instead ofchanging the access permission of all files one by one, you can go to the parent folder (e.g.csci3150-bonus1-Jim) that contains your assignment and execute the command chmod -R 777csci3150-bonus1-Jim, which changes the access permissions to all files in csci3150-bonus1-Jim. After you have finished the scripts, run grader.sh to check whether you can pass thegiven test cases, you shall see something like this:9For each failing test case, grader.sh prints your output on the left against our expectedoutput on the right. At the end, it prints the total number of test cases passed.2.5 Your jobYour job is to fill up the contents for listCourses.sh, listNumbers.sh,insert.sh anddelete.sh in order to pass all given test cases and let the grader print the following:2.6 Submitting your assignmentFollow the same procedure in assignment 0.3 Grading1. The TA will fetch and grade your latest version in your repo as of April 25, 201911:00AM. Remember to commit and push before the deadline!2. 10 test cases in total, which are testcase1 to testcase10 as listed in grader.sh.3. Passing one test case will earn you 10 marks.4. Your script shall output results to standard output stream but not to any file. Otherwise,you will get 0 mark.5. Your script shall NOT write any intermediate result to file. Otherwise, you will get 0mark.4 Change Log1.0 this document105 QuestionsIf you have doubts about the assignment, you are encouraged to ask questions on Piazzausing the corresponding tag. Please focus on knowledge. Unhealthy questions/commentsthat focus on scores and grades are not encouraged.If you find any (possible) bugs, send private questions on Piazza to us instead— otherwise that may cause unnecessary panic among the class if that is not a real bug.6 Academic HonestyWe follow the University guide on academic honesty against any plagiarism.7 General Notes This specification and our grading platform are both based our given course VM. Youshould compile, debug and run the assignment program on that VM. So, if you insistto develop on another platform other than our VM and got any question, test it onour VM before you ask. The TA reserves the right to adjust your scores for any request that requires their extramanual effort. Unless specified, you should work and fill your code in designated areas. There arecases that the modification outside the designated area leads to misbehavior of the autograder. Proceed with caution and look back the changes if your output is different fromwhat is shown in the grader. While we have already tried our best to prepare this assignment, we reserve all therights to update the specification and the grading scheme. If there are any mistakes/bugswhich are on ours, the TA will step in and do manual grading to ensureyou get what you deserve. Please respect each other. Any irresponsible, unfair, biasedsentiment would regard as a disciplinary case.11 If this is a programming assignment, only C is allowed, not even C++. If this is ascripting assignment, only bash shell script is allowed, not even Python. Furthermore,for C programming assignments, use the “exit” function parsimoniously because itmight influence the grader as well. Therefore, use “return” instead of “exit” wheneverpossible. Although this is not an algorithm class, you still shouldn’t implement your assignmentwith very poor complexity. While the TAs will try their best to run your programas long as they could, they reserve the right to terminate a test case and regard thatas a failed test case when a program takes unreasonably long time to finish (try tocompare your running time with the TA’s demo if it is given), or until when the TAscan’t run any longer due to the deadline the TA needs to submit your final scores tothe department. When grading, the TAs will execute the grader program to run the whole test suite(which consists of all test cases). The TAs won’t grade each individual test caseseparately. (Frequently Asked) [Output format] If the assignment package includes a demo,then our grader defines test cases based on the given demo. In that case, your outputshall exactly follow that demo. For example, hypothetically, if our demo outputs amessage like:command not foundwith two spaces between “not” and “found”. Your output shall also match that inorder to pass the test. The good news is that, if our given demo has not implementedsomething (e.g., missed certain error checking), you also don’t need to do so. Notest cases would be defined based on something that our demo has notimplemented. (Frequently Asked) [Scope of error handling] The scope of error checking andhandling shall refer to both our given demo (if given) and our given test cases.First, the corresponding output message shall exactly follow our demo. Second, you12are informed that our demo may have implemented more error checking that what ourgrader will test. In that case, it is fine that you implement only the error checking thatis tested by our grader. So, one top tip is:CHECK THE (SOURCE OF)TEST CASES BEFORE YOU ASK (Frequently Asked) [No hidden test case] We are not intended to run any secret/extratest cases that deliberately break your assignment. That is, WYSIWYG —your final score shall be generally indicated by what the grader reports when it runson the course VM. However, we do reserve the right to run some additional test casesto avoid any mis-conduct (e.g., hard-coding the results), and/or invite you to explainthe source code to the teaching assistants and adjust the scores accordingly. We welcome discussions among classmates. But don’t share your assignment with theothers in any means. For example, don’t put your source code in any public venue (e.g,public repo, your homepage, Facebook). We handle plagiarism strictly. On submittingthis assignment, you are agreed that your code’s copyright belongs to the ChineseUniversity of Hong Kong. Unless with our written approval, you must not releaseyour source code and this specification now and forever. If you share your code withanyone without our written consent, that would regard as a disciplinary case as longas you are still a CUHK student (i.e., even after this course). If you share your codewith anyone without our written consent after your graduation, that would regard asa breach of copyright and we reserve all the rights to take the corresponding legalactions. Google is your friend. We encourage you use Google for help to do the assignment.However, if you happen to find any source codes related to this assignment, you stillcannot copy it but use your own way to implement it. You need to put down your listof source code references as comments in the top of your source code.13 (Frequently Asked) [Late Policy] TAs will only grade the latest version submittedbefore the deadline, no late submission is allowed. It is your responsibility to makesure you added, committed, and pushed the final version before the deadline. You arerequired to check whether your final version is really in Github Classroom.14本团队核心人员组成主要包括BAT一线工程师，精通德英语！我们主要业务范围是代做编程大作业、课程设计等等。我们的方向领域：window编程 数值算法 AI人工智能 金融统计 计量分析 大数据 网络编程 WEB编程 通讯编程 游戏编程多媒体linux 外挂编程 程序API图像处理 嵌入式/单片机 数据库编程 控制台 进程与线程 网络安全 汇编语言 硬件编程 软件设计 工程标准规等。其中代写编程、代写程序、代写留学生程序作业语言或工具包括但不限于以下范围:C/C++/C#代写Java代写IT代写Python代写辅导编程作业Matlab代写Haskell代写Processing代写Linux环境搭建Rust代写Data Structure Assginment 数据结构代写MIPS代写Machine Learning 作业 代写Oracle/SQL/PostgreSQL/Pig 数据库代写/代做/辅导Web开发、网站开发、网站作业ASP.NET网站开发Finance Insurace Statistics统计、回归、迭代Prolog代写Computer Computational method代做因为专业，所以值得信赖。如有需要，请加QQ：99515681 或邮箱：[email protected] 微信：codehelp
