Must-do problems: Copying Objects

120 min · Beginner

Every problem here asks for a copy that behaves correctly: separate where each side owns its data, shared where there is one real thing. Before you code, decide for each field whether to copy it or share it, then run every test before opening a hint.

What you will learn

Copy arrays and 2D arrays so a change to the copy never reaches the original
Write copy constructors that deep copy every changeable field
Decide field by field what to copy and what to share on purpose
Build save points and versions that copy on save and on restore

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