Finishing Chapter 12

• You should re-read chapter 12.
• constant reference
  • Just like we could pass arrays by const pointer.
  • We can pass everything else by constant reference.
  • void PrintBucket(const BucketT & bucket);
  • This is a good thing
    • It documents that we will not be changing the parameter.
    • It also means we can make function calls faster.
  • But it requires us to learn about const member methods.
• const member methods
  • Tells the compiler/user/... that the method will not change the class.
  • returnType functionName(parameters) const;
  • returnType functionName(parameters) const{}
• This is demonstrated in this code
• Class Scope
  • Items in a class have scope within the class.
  • This is different that local scope for functions.
• By the way, the Person class exhibits Composition
  • A person has a bucket
  • This is one of several relationships we will explore in 330.
  • Since the bucket can exist without a person, we call this a Shared Aggregation
• UML
  • The Unified Modeling Language
  • This is a way to draw class design.
  • We will do a very simple version for now.
  • A class is a box, with three portions
    • The first shows the name of the class
    • The second gives the member data
      • +/-
      • name
      • :
      • type
    • The third gives the methods or member functions
      • +/-
      • name
      • parameters
      • :
      • Return type
  • There is a tool to do this
    • On your computer umlet
    • On line umlentino
  • Shared aggregation is a hollow diamond
    • The diamond points at the containing class.
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