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14. Classes and invariants

• 14.1. Private data and classes
• 14.2. What is a class?
• 14.3. Complex numbers
• 14.4. Accessor functions
• 14.5. Output
• 14.6. A function on Complex numbers
• 14.7. Another function on Complex numbers
• 14.8. Invariants
• 14.9. Preconditions
• 14.10. Private functions
• 14.11. Glossary
• 14.12. Multiple Choice Exercises
• 14.13. Mixed-Up Code Exercises
• 14.14. Coding Practice

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