Programming reasoning
Programming reasoning is the practice of making the decisions that sit behind working code. It turns a requirement into a model, a model into an algorithm, and an algorithm into code that is understandable and testable.
The goal of this section is not to memorize a recipe. It is to follow one requirement as it becomes more precise. We will use a small help desk system that receives player-support events, stores tickets, assigns work, and tracks related incidents.
At each step, the case study changes only when a new requirement demands it. That makes the reason for each design choice visible. The examples also leave room for uncertainty: a solution is not finished until its behavior has been checked with boundary cases, tests, and evidence.
Begin with the help desk case study and clarify what the system must do.