What's new for me

• use constant variables

Naming

• long name > short name

  A long descriptive name is better than a short enigmatic name
  -- Uncle Bob Martin

• use verb/action for func names
• if name includes and, split function (doing to many things in a function)
  ex)check_and_execute -> check , execute

Reminder

• One responsibility per function

• avoid tmp and retval

• do NOT abbreviate when not sure

Funcs

• no more than 2 levels of nasting
• do NOT repeat yourself

Tips

• naming (void swap_if_needed())
• naming (char *to_pop)