Homework 3, Grades.

Short Description:

Goals

• Demonstrated your ability to design/implement/employ functions.
• Demonstrated your ability to deal with floating point numbers.

Formal Description

Your program should start by requesting the name of a file containing grade data for the semester. You may assume that the file name will be correct.

Your file ineraction shold be exactaly three lines:

1. The phrase "Enter a file name: "
2. The statement "Opening ", followed by the file name
3. A blank line.

Enter a file name: Bob_Smith.dat
Opening Bob_Smith.dat

[bennett@mirkwood closed]$ gradebook
Enter a file name: Bob_Smith.dat

Opening Bob_Smith.dat

Grade Report for: Bob Smith
...

This file is in the following format:

• The first line contains the student's name.
• The next line contains homework grades.
  • Each grade consists of a pair score/points
    • score represents the number of points the student earned on the homework.
    • points represents the number of points possible.
    • score ≤ points.
  • These will be separated by spaces.
  • The last value will be 0/0 which will mark the end of the data.
  • Example: 9/10 15/20 35/40 0/0
    • In this case, there are three valid scores
    • The student has earned 9 + 15 + 35 = 59 points
    • The total points available is 10 + 20 + 40 = 70 points
    • The percentage for this is 59/70 = .8428 or 84.3%. (do not round in your computation)
  • If no scores are present (IE the line contains 0/0) then the home work component should not be part of the final score.
• The next line will consist of group work scores.
  • These will be in the same format and meaning as homework scores.
  • Example: 9/10 30/35 10/10 0/0
  • This will be 49/55 = 89.1%
  • If no scores are present (IE the line contains 0/0) then the group work component should not be part of the final score.
• The next line will consist of test scores
  • This will start with an integer (n) indicating how many tests have been taken.
    • If this n = 0, then not tests have been taken and the test portion should not be part of the final score.
  • There will be n floating point numbers representing the score on each test.
    • These numbers will have values between 0 and 1.
    • Each number represents a score on a test.
  • Example: 3 .78 .95 1.0
  • This means the student has a test average of 2.73/3 = .91
• The next line will consist of a final score
  • It starts with an indicator value, a character
    • If the value is 'y', then it is followed by a final exam score
      • The final exam score will be between 0 and 1.
    • If the value is 'n', then the final exam has not been taken and the final should not count towards the grade computation.
  • Example: y .90
    • The student achieved a 90% on the final exam.
• The next line consists of four percentage values.
  • These are integers between 0 and 100.
  • The sum of these values will be 100
  • These represent the weight of each component.
    • Homework, group projects, tests, final
  • Example: 40 20 30 10
• The last line consists of four values, the minimal percent for each letter grade.
  • These are integer values between 0 and 100.
  • These represent the minimum percentage needed to earn each letter grade.
  • Example: 60 70 80 90
    • Students with grades between 0 and 59 receive an F
    • Students with grades between 60 and 69 receive an D
    • Students with grades between 70 and 79 receive an C
    • Students with grades between 80 and 89 receive an B
    • Students with grades 90 and above receive an A
• An example file:

  Bob Smith
  9/10 15/20 35/40 0/0
  9/10 30/35 10/10 0/0
  3 .78 .95 1.0
  y .9
  40 20 30 10
  60 70 80 90

• A second example:

  Susan Lee
  92/100 0/0
  80/100 0/0
  0
  n
  40 20 30 10
  60 70 80 90

You should print this information in the following format:

Enter a file name: Bob_Smith.dat
Opening Bob_Smith.dat

Grade Report for: Bob Smith
Homework Average: 84.3%
Groupwork Average: 89.1%
Test Average: 91%
Final Exam: 90%
Class Average 88%
Letter Grade: B

• The homework and groupwork averages should be accurate to one decimal place.
• Tests, exam and class averages should be printed with no decimal places.
• All values should be rounded properly
• If a component is not present, print "Not Present"

Enter a file name: Susan_Lee.dat
Opening Susan_Lee.dat

Grade Report for: Susan Lee 
Homework Average: 92.0%
Groupwork Average: 80.0%
Test Average: Not Present 
Final Exam: Not Present 
Class Average 88%
Letter Grade: B

• For each category, compute the average as shown above.
• Form a weighted average
  • homework percent * homework weight + groupwork percent * groupwork weight + test percent * test weight + final percent * final weight
  • Divide this by the sum of the weights present
  • Example:
    • .8428 * 40 + .891 * 20 + .91 * 30 + .9 * 10 = 87.83
    • 87.73 / (40 + 20 + 30 +10 ) = .8783 = .88 = 88%
  • Example 2:
    • .92 * 40 + .80 * 20 = 52.8
    • 52.8/(40 +20) = .88 or 88%.
    • Notice since tests and final were missing, they were not included in the computation.

Notes

1. Your code must compile with the following flags

   •   -g -O2 -Wall -Wextra -Werror

   • You can use this Makefile, if you call your project gradebook.cpp no changes will be needed.
2. Be warned, the examples are only examples, the data used to test your program will change.
   • All data will be valid, as described above.
   • But quantities and values will be different.
   • DO NOT BUILD YOUR PROGRAM with the values above hard coded as data. Read from a file.
3. Your program should produce NO output other than the requested output above.
4. The given data files:
   • Bob_Smith.dat
   • Susan_Lee.dat
5. The given output files
   • Bob_Smith.out
   • Susan_Lee.out
6. Any missing data should be labeld with "Not Present"
   • If the student has not completed any elements of the class, the class average and the letter grade should also be reported as "Not Present".
7. Your program must compile and run on devweb1.cis.pennwest.edu
8. Your program must be well documented.
9. Your program must include at least four functions, but more would be better.
10. Your program should follow all standards for style discussed in class and in the style guide.

Required Files

Submission