Lecture 2: Review

1
Lecture 2 Review

• Key based authentication, what is it and what can
  you do with it?
• What kinds of C programs are considered portable?
  How to make sure that one writes portable C
  programs?
• How to access command line arguments in a C
  program?
• What are environment variables and how to access
  them in a C program?

2
Lecture 2 Review

• In lect2/makefile4,
• which rules are target rules? Which are inference
  rules?
• What happen when we run make f makefile4 demo?
• Compare makefile3 and makefile4,
• Name two scenarios that the two makefiles behave
  differently.
• which is a better makefile?

3
Lecture 2 Review

• How to make sure that a header file (e.g. a.c) is
  included at most once in a program?
• What is wrong with the following define
  statement?
• define sum(a, b) a b
• Use sscanf to get from the output of who the
  login-name, the date, and the login machine name?