Grading-System Solved

Grading-System Solved

Objected Oriented C++, targeted at editing and storing different types of students ‘ grade

Project Description:


To gain experience with base and derived classes, virtual functions, and using applications of polymorphism. Also, to gain further

practice with file I/O.

ABET/SMALCS Assessment

This assignment is designated as one of the two course assignments being used to assess basic programming skills for ABET/SMALCs requirements. Please see the syllabus for details. Note that in addition to the normal grading scales, each student’s submission will be judged in several aspects on a scale of “Highly Effective”, “Effective”, or “Ineffective”, as specified by ABET/SMALCS outcome assessment procedures. A student’s submission that earns 70% of the available points will count as an overall score of “Effective”.


You will design a set of classes for storing student information, along with a main program that will read student information from a file, store the data, compute final grades, and then print a summary report to an output file.


1.Design a set of classes that store student grade information. There should be one base class to store common data, and three derived classes that divide the set of students into three categories: Biology students, Theater students, and Computer Science students. All data stored in these classes should be private or protected. Any access to class data from outside should be done through public member functions. The base class should allocate storage for the following data (and only this data): ◦ student’s first name (you may assume 20 characters or less)

◦ student’s last name (you may assume 20 characters or less)

◦ Which course the student is in (Biology, Theater, or Computer Science)

2.Each class must have a function that will compute and return the student’s final average, based on the stored grades. All grades are based on a 100 point scale. Here are the grades that need storing for each subject, along with the breakdown for computing each final grade:

Biology — Lab Grade = 30%, Three term tests = 15 % each, Final Exam = 25%

Theater — Participation (scene studies) = 40 %, Midterm = 25%, Final Exam = 35%

Computer Science — There are 6 programming assignments, to be averaged into one Program Average (which can be a decimal number).

Final grade computed as follows:

* Program Average = 30%, Test 1 = 20%, Test 2 = 20%, Final Exam = 30%

3.Write a main program (in a separate file) that does the following (in this order):

a) Ask the user for input and output file names. This is the only input and output that should be done from keyboard and to the screen. All other input and output will be to and from files. (See the sample run below).

b) Read the student data from the input file and store it using an array of appropriate type. You should use just one array for all students, not a separate array for each subject (i.e. this will be a heterogeneous list). You will need to allocate this list dynamically, since the size is stored in the input file. (Note that this also means each list item will need to be created dynamically). Each student’s data should be stored in a separate object. (Any dynamically allocated space should be cleaned up appropriately with delete when you are finished with it).

Hint: Remember that a heterogeneous list is implemented using an array of pointers to the base class type. And as stated above, this must be created dynamically in this situation. i.e. you will need to use the new operator. If you declare your array like this:

Student* list[size];

then it is WRONG.

c) Print a summary report to the output file, as specified below. You’ll need to use the function that computes the final average when you do this, since the final averages will be included in this summary report.

4.File formats

Input File — The first line of the input file will contain the number of students listed in the file. This will tell you how big a list you need. After the first lines, every set of two lines constitutes a student entry. The first line of a student entry is the name, in the format lastName, firstName. Note that a name could include spaces — the comma will delineate last name from first name. The second line will contain the subject (“Biology”, “Theater”, or “Computer Science”), followed by a list of grades (all integers), all separated by spaces. The order of the grades for each class type is as follows:

Biology — Lab Grade, three term tests, Final Exam
Theater — Participation, Midterm, Final Exam
Computer Science — six Program grades, Test 1, Test 2, Final Exam

Output File — The output file that you print should list each student’s name (firstName lastName – no extra punctuation between), Final Exam grade, final average (printed to 2 decimal places), and letter grade (based on 10 point scale, i.e. 90-100 A, 80-89 B, etc). Output should be separated by subject, with an appropriate heading before each section, and each student’s information listed on a separate line, in an organized fashion. (See example below). Data must line up appropriately in columns when multiple lines are printed in the file. At the bottom of the output file, print a grade distribution of ALL students — how many As, Bs, Cs, etc.

5.General Requirements ◦No global variables, other than constants!

◦All member data of your classes must be private or protected

◦Use the const qualifier on member functions wherever it is appropriate.

◦The code for this program should be portable. Test with g++ compiler commands before submitting

◦You may use any of the standard I/O libraries that have been discussed in class (iostream, iomanip, fstream, as well as C libraries,
like cstring, cctype, etc). You may also use the string class library

◦You may not use any of the other STL (Standard Template Libraries) besides string

◦You should have already seen basic C++ file I/O techniques and I/O formatting in your pre-requisite course. If you need a refresher, see the following notes sets from COP 3014, Summer 2010:   File I/O and Stream Objects

 Output Stream Formatting


Extra Credit

Within each subject in the output file, list the students in alphabetic order, sorted by last name. Do not change the given case (upper/lower case) of the names that were read from the input file when you print the output file, and do not change the output file format. Just print the records in order by last name. This sort needs to be true alphabetical (not just the “lexicographical” sort).


Sample run

Screen input and output: (keyboard input is underlined) Please enter the name of the input file.

Filename: test.txt

Please enter the name of the output file.

Filename: outfile.txt

Processing Complete


Sample input file: (Get a copy here)


Squarepants, Spongebob

Computer Science 90 72 85 96 100 88 80 91 92

Finklebottom, Joe

Biology 85 90 78 85 89

Dipwart, Marvin

Theater 85 72 95

van Houten, Milhouse

Computer Science 45 57 26 79 54 52 60 71 63

Simpson, Homer J.

Theater 82 76 74

Cyrus, Miley

Biology 74 65 58 62 71


Corresponding output file: Student Grade Summary


Student Final Final Letter
Name Exam Avg Grade
Joe Finklebottom 89 85.70 B
Miley Cyrus 71 67.70 D


Student Final Final Letter
Name Exam Avg Grade
Marvin Dipwart 95 85.25 B
Homer J. Simpson 74 77.70 C


Student Final Final Letter
Name Exam Avg Grade
Spongebob Squarepants 92 88.35 B
Milhouse van Houten 63 60.75 D



A: 0
B: 3
C: 1
D: 2
F: 0
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