OOP- 6 Direct Access Files & Software Engineering Individual Assignment

Transcription

1 OOP-6-DA-Files-SE-HW.docx CSCI 2320 Initials P a g e 1 If this lab is an Individual assignment, you must do all coded programs on your own. You may ask others for help on the language syntax, but you must organize and present your own logical solution to the problem. No lab is complete until the student submits the signed pledge form associated with that lab. I realize that no coded programs will be graded until I turn in the sign & pledge form associated with that program; any late penalties will continue to compound until the pledge form is submitted. If this lab is a team assignment, both team members may share logic as they program side by side on their own computers. Each person must type all of his/her own code as part of the learning process. Team assignments are never to be "You do this portion and I ll do that portion" or "You do this lab and I ll do the next lab". Some of the lab assignments will have short answer questions. These short answer questions will be spot checked and graded for completion, but not checked for accuracy. Once these labs are graded and returned, I encourage you to compare answers with another class member who has also had the lab graded and returned. I/We realize that the penalty for turning in work that is not my own, or assisting others in doing so, can range from an "F" in the class to dismissal from Trinity University. I realize that it is a violation of academic integrity to share any portion of this lab with any person (outside my 2320 team & professor)! Print Name Time Required =. Hrs. Signature (pledged) OOP- 6 Direct Access Files & Software Engineering Individual Assignment Short Answer Questions 15 Points Electronic Solutions Of Short Answer Questions Will Not Be Accepted. Print A Copy Of Short Answer Question & Write Answers On Printed Copy 1] Write the line ofc/c++ code to create a text file pointer called fp. 2] Write the line ofc/c++ code to open an existing text file, called "Data.txt" for reading data; associate it with fp. 3] Write the line ofc/c++ code to close text file Data.txt. 4] Write a complete program which will (1) open/create text file "Me.txt" (2) use fputs to write your full name, & (3) close the file. You may assume file pointer fp. TEST YOUR CODE IF UNCERTAIN! 5] Write a complete program which will (1) open/create text file "State.txt" (2) use fprintf to write your home state, & (3) close the file. You may assume file pointer fp. TEST YOUR CODE IF UNCERTAIN!

2 OOP-6-DA-Files-SE-HW.docx CSCI 2320 Initials P a g e 2 6] Write a complete program which will (1) open/create text file "Nos.txt" (2) use fprintf to write the first 10 even nos one to a line, & (3) close the file. You may assume file pointer fp. TEST YOUR CODE IF UNCERTAIN! 7] Write a complete program which will (1) open text file "Me.txt" (2) use fgets to read the name from the file into MyName & (3) dispay MyName =??, (4) close the file. You may assume file pointer fp and char MyName[100]. TEST YOUR CODE IF UNCERTAIN! 8] Write a complete program which will (1) open text file "State.txt" (2) use fscanf to read the state from the file into MyName & (3) dispay MyState =??, (4) close the file. You may assume file pointer fp and char MyState[100]. TEST YOUR CODE IF UNCERTAIN! 9] Write a complete program which will (1) open text file "State.txt" (2) use fscanf to read the state from the file into MyNo & (3) dispay , (4) close the file. You may assume file pointer fp and int MyNo. TEST YOUR CODE IF UNCERTAIN! 10] The slides specify two reasons why we need Direct Access Files. List them. Insufficient _?_ to store data

3 OOP-6-DA-Files-SE-HW.docx CSCI 2320 Initials P a g e 3?_ is volatile 11] In only the space below, describe the major advantage of Direct Access Files over Text Files with respect to reading a desired block of data. 12] In only the space below, describe the major advantage of Direct Access Files over Text Files with respect to changing a desired block of data. 13] Write the line ofc/c++ code to create a direct access file pointer called fp. 14] Write the line ofc/c++ code to open an existing direct access file, called "Data.fil" for reading data; associate it with fp. 15] Write the line ofc/c++ code to create/overwrite a direct access file, called "Data.fil" for reading data; associate it with fp. 16] Write the line ofc/c++ code to close direct access file Data.fil. 17] Explain why it is necessary to close all files. 18] SEEK_END is a constant representing the _?_. 19] SEEK_SET is a constant representing the _?_. 20] Write the line of C/C++ code to open to move the r/w pointer to the third [Record # 2] Student type record of the file referenced by fpstudent. 21] Write the line of C/C++ code to open to move the r/w pointer to the first [Record # 0] Part type record of the file referenced by fppart. 22] Write the line of C/C++ code to open to move the r/w pointer to the tenth [Record # 9] Part type record of the file referenced by fppart.

4 OOP-6-DA-Files-SE-HW.docx CSCI 2320 Initials P a g e 4 23],,, The direct access file, referenced by fp, contains exactly 3 Student type records. When writing records, the only valid record numbers which can be sought with fseek are _?_, _?_, _?_, and _?_. 24],, The direct access file, referenced by FilePtr, contains exactly 3 Student type records. When reading records, the only valid record numbers which can be sought with fseek are _?_, _?_, and _?_. 25] - The direct access file, referenced by FilePtr, contains exactly 100 Employee type records. The valid range of acceptable fseeks when writing records to that file are _?_ to _?_. 26] - The direct access file, referenced by FilePtr, contains exactly 100 Employee type records. The valid range of acceptable fseeks when reading records to that file are _?_ to _?_. 27] Write the line ofc/c++ code to open the existing direct access file, called "Students.fil" for reading data; associate it with sfp. 28] Write the line of C/C++ code to create a variable, called TempStudent, that is of Student type. 29] After examining the Student class in the Student.hpp and Student.cpp files, write the line of C++ code necessary to fill object TempStudent with a name of Jane Doe, the number 123, and the FEMALE attribute. 30] Write the line of C/C++ code to open to move the r/w pointer to the fourth [Record # 3] Student type record of the file referenced by sfp. 31] Assume that our open Student file has 20 records and that the read/write pointer is set to record # 3, Write the line of C/C++ code to overwrite this record with the value stored in TempStudent to the direct access file referenced by sfp. 32] Assume that our open Student file has 20 records. We wish to add a new record to the end of the file. Write the line of C/C++ code to open to move the r/w pointer to the fourth [Record # 20] Student type record of the file referenced by sfp. 33] Assume that our open Student file has 20 records and that the read/write pointer is set to record # 20, Write the line of C/C++ code to add the value stored in TempStudent to the end of the direct access (already referenced by sfp. 33] Assume that our open Student file has 20 records and that the read/write pointer is set to record # 20, Write the line of C/C++ code to add the value stored in TempStudent to the end of the direct access (already referenced by sfp. 34]. If it takes seconds to read 50,000 records, then the number of records that can be read in 1 second = _?_ (xxx.xxx). Show Your Work. 35]. If it takes 6.1 seconds to read 4,000 records, then the number of records that can be read in 1 second = _?_ (xxx.xxx).

5 OOP-6-DA-Files-SE-HW.docx CSCI 2320 Initials P a g e ]. Record Size = 20,000 bytes. 1,000,000 records. read/write 750 records in 1 second. It would take _?_ minutes (xxx.xxx) to sequentially read through all of the records. Show Your Work! 46-50]. Unordered List - Record Size = 20,000 bytes. 1,200,000 records. read/write 500 records in 1 second. The Worst Case Sequential Search Time = _?_ minutes (xxx.xxx) ]. Unordered List - Record Size = 20,000 bytes. 1,200,000 records. read/write 500 records in 1 second. The Average Sequential Search Time = _?_ minutes (xxx.xxx). Show 51-55]. Ordered List - Record Size = 20,000 bytes. 1,200,000 records. read/write 500 records in 1 second. The time to read/write 1 record = _?_ seconds (xxx.xxx) ]. Ordered List - Record Size = 20,000 bytes. 1,200,000 records. read/write 500 records in 1 second. The Worst Case Binary Search By Key Time = _?_ seconds (xxx.xxx). Show 61-65]. Ordered List - Record Size = 20,000 bytes. 1,200,000 records. read/write 500 records in 1 second. The Average Case Binary Search By Key Time = _?_ seconds (xxx.xxx). Show 66-70]. Unordered List - Record Size = 20,000 bytes. 1,200,000 records. read/write 500 records in 1 second. We know the location. The Average Delete Time = _?_ seconds (xxx.xxx) ]. Ordered List - Record Size = 20,000 bytes. 1,200,000 records. read/write 500 records in 1 second. We know the location. The Average Delete Time = _?_ minutes (xxx.xxx).

6 OOP-6-DA-Files-SE-HW.docx CSCI 2320 Initials P a g e ]. Ordered List - Record Size = 20,000 bytes. 1,200,000 records. read/write 500 records in 1 second. We know the location. The Worst Case Delete Time = _?_ minutes (xxx.xxx) ]. Unordered List - Record Size = 20,000 bytes. 1,200,000 records. read/write 500 records in 1 second. We know the location. The Worst Case Add Time = _?_ sec (xxx.xxx) ]. Ordered List - Record Size = 20,000 bytes. 1,200,000 records. read/write 500 records in 1 second. We know the location. The Average Add Time = _?_ minutes (xxx.xxx). Show 91-95]. Ordered List - Record Size = 20,000 bytes. 1,200,000 records. read/write 500 records in 1 second. We know the location. The Worst Case Add Time = _?_ minutes (xxx.xxx). 96] When using Visual Studio Net, the cpp and hpp files willl be compiled to form an executable file whose extension is _?_. 97] When using Visual Studio Net, the object files and executable are located in the _?_ directory. 98] When using Visual Studio Net, the Student.hpp and Student.cpp files willl be compiled to form an object file called _?_. What To Turn In No Lab Is Complete Until Both Are Complete ] You sign & submit the Pledge form. a) Make sure that all program files have a header box with a purpose that clearly defines what you are accomplishing in this lab. b) Make sure that each and every program function has a well formed documentation box that clearly describes the purpose. c) Make sure that each and every program function header box has the appropriate Written By and Date. d) Review the Pledge statement e) Sign & Pledge f) Record the amount of time you think you spent on this lab

7 OOP-6-DA-Files-SE-HW.docx CSCI 2320 Initials P a g e 7 g) Staple all pages of this lab. Fold in half length-wise (like a hot-dog). Put your name on the outside. Place it on the professor desk before the beginning of lecture on the day it is due. The penalty for late homework will not exceed 25% off per day. 2] Place all programming code associated with this program, if any, in the Professor s Code Drop Box a) I do not accept programs by mail; do not submit labs via ! Comments A] Programs that do not compile are worth little, if anything. B] If a print statement format is off, the penalties will often be less than the 25% per day late penalty; turn in the lab. You would not be happy if you went to Best Buy and purchased a large screen TV that did everything except show the picture; you would consider it pretty worthless. Most users consider software that does not work properly pretty useless as well. If the lab is not working correctly, credit will be small (if any); you might be better to accept a 25% (1 day) late penalty and turn in the lab working correctly! C] Start all programs early so that you can get in contact with the professor if you have problems. D] If you are turning in this lab late, you may hand it to me if I am in the office put it in the mail box outside my office door slide it under the outer door to our suite {if locked} slide it under my office door. The sooner I get late labs, the sooner the late penalty meter quits clicking. E] Backup your programs in at least three places. Put a copy on your Y drive. Put a copy on your flash drive. Put a copy on your personal computer. Send yourself a copy in your .