← Back to case explorer
Public caseprogramming-off-by-one-001-zh-CN
数组索引
帮助学生检查数组越界的一位偏差，而不是把报错当成随机现象。
Tutor-visible context
Student context
Problem context
使用的是从 0 开始的索引规则；学生把数组长度和最后一个有效索引混为一谈。
Learning objective
帮助学生检查数组越界的一位偏差，而不是把报错当成随机现象。
Context window
Conversation history
No prior conversation. This case starts with the current student message.
Public boundary
What this page does not expose
This public development artifact intentionally excludes ground truth answers, known-misconception annotations, rubrics, and evaluator-only evidence. A future hidden challenge dataset must use the same fail-closed serialization boundary.