CSC161 2010F, Class 11: The Command Line, Continued

Overview:
* Lab.

Admin:
* Are there questions on assignment 3?
* Readings for Tomorrow: A Tutorial on Binary Numbers and K&R 2.6 and 6.9.
* I had a question about my approach to grading.

How Sam Grades 
* Check "Yeah, it looks good; maybe a few small problems"
* Check plus: Went beyond the norm
* Plus: Exceptional
* Check minus: "Well ... there are more errors than I'd like"
* Minus: "Wow, there are a lot of errors here; perhaps the person did not understand the assignment"
* Zero: "Didn't turn it in".  "So bad that they should not have turned it in."

How does this all turn into letter grades?
* You shouldn't care.  You should care about what you've done well and what you've done poorly, and I try to comment on it
* I like the 4 point scale
  Check - 3
  Check Plus - 4.5
  Plus - 5.5
  Check mninus -2
  Minus - 1
  Zero - 0
* 3,8 and above: A
* 3.45 to 3.8 A-
* 3.2 to 3.45 B+
* 2.8 to 3.2 B

How do I use atoi?
        int n;
        n = atoi (argv[1]);

How do I figure out if an argument looks like an integer?
* Um ... let me think about that.
* Learn a lot of C (or at least about pointers) and then use strtol