Separating Interface from Implementation

(see Figs. 1.8-1.10)

• Separating interface from implementation
  • Advantage; Easier to modify programs
  • Disadvantage
    • Header files
    • Portions of implementation; Inline member functions
    • Hints about other implementation; private members
    • Can hide more with proxy class
• Header files
  • Class definitions and function prototypes
  • Included in each file using class; #include
  • File extension .h
• Source-code files
  • Member function definitions
  • Same base name; Convention
  • Compiled and linked

Figure 1.8: Time class definition and Time class member-function definitions (part 1 of 2).

Figure 1.9: Time class member-function definitions (part 2 of 2).

Figure 1.10: Program to test class Time.

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