Classwork 6

Logistics

  • Due: Monday, February 6th AoE.
  • Submission instructions: make sure that the required file (grade.c) is in your /classwork/week4/mon/ directory.
  • Deadline reminder: after the deadline passes, you cannot earn any points for this assignment.

Learning outcomes

  • Practice using a switch statement.

Assignment

  • Log in to the server.
  • From your home directory, navigate to classwork/week4/mon/, creating directories week4 and mon if necessary.
  • Inside this directory, create a file called grade.c. In it, write a program solving the following problem.

Prompt the user for their grade. Then, using a switch statement, report back the minimum points they earned in the course. (Consult the grades section of the syllabus.) You should allow both capital and lowercase letters for grades A, B, C, and D. You must match the output formatting below and you must use a switch statement. If they enter something other than the allowed grades, print “You earned an unknown number of points in the class.”

[p19t655@csci112 mon]$ ./exe
Enter the grade you got: 5
You earned an unknown number of points in the class.
[p19t655@csci112 mon]$ ./exe
Enter the grade you got: A
You earned at least 93 points in the class.
[p19t655@csci112 mon]$ ./exe
Enter the grade you got: f
You earned an unknown number of points in the class.
[p19t655@csci112 mon]$ ./exe
Enter the grade you got: d
You earned at least 63 points in the class.

Hints

  • It is standard to include a newline (\n) at the end of the last line of any file; thus, your final print statement should include a newline at the end. If you get the error \ No newline at end of file in your diff below, it’s because you’re missing the newline.
  • You can check that you will get full credit for this assignment by compiling your program, running it and saving its output to a file, and comparing that file to the example output. Specifically, do:
    gcc -o exe -Wall grade.c
./exe < /public/classwork/week4/mon/test_input1.txt > output.txt
diff -w -i ~/classwork/week4/mon/output.txt /public/classwork/week4/mon/expected_output1.txt
./exe < /public/classwork/week4/mon/test_input2.txt > output.txt
diff -w -i ~/classwork/week4/mon/output.txt /public/classwork/week4/mon/expected_output2.txt
./exe < /public/classwork/week4/mon/test_input3.txt > output.txt
diff -w -i ~/classwork/week4/mon/output.txt /public/classwork/week4/mon/expected_output3.txt
./exe < /public/classwork/week4/mon/test_input4.txt > output.txt
diff -w -i ~/classwork/week4/mon/output.txt /public/classwork/week4/mon/expected_output4.txt

    You will see any warnings during compilation and any differences between your output and the expected output on the screen. If nothing happens, the content of your output file exactly matches the expected content and there were no warnings when compiling. As long as your file is in the correct place and named correctly, this means that you will get full credit for the assignment.

Grading turnaround

Preliminary results via autograder will be present in the appropriate classwork directory in the autograder.txt, refreshed every 5 minutes from 8am to 11am on the class day, and then every hour until 6am the following day. The 6am run is the final grade. Scores will be uploaded to D2L by the next class period.