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📜 WAYPOINT LESSON

Checkpoint: Multi-File Thinking

⭐ beginner⏳ 15 min read📍 Lesson 55 of 204

One graded challenge: given headers and implementations, spot the ODR violation and the declaration that fixes a link error.

Checkpoint — multi-file. Pass the graded challenge below to finish the module.

Graded in the platform's single-file world, but the questions are exactly the two-file ones: what breaks the link, and what fixes it.