# Page Not Found

The URL `1_program_basic/1_c/9struct` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [结构和复杂数据形式](https://embedded.xym.work/01-ji-suan-shi-shen-me/1_1program_basic/1_c/9struct.md)
- [计算机的抽象与技术](https://embedded.xym.work/1_3_organization/2_computer_design/1_abstract.md)
- [计算机中的指令](https://embedded.xym.work/1_3_organization/2_computer_design/2_instruction.md)
- [字符串和字符串函数](https://embedded.xym.work/01-ji-suan-shi-shen-me/1_1program_basic/1_c/6string.md)
- [绪论](https://embedded.xym.work/1_5_operating_system/2_concurrency/1_introduction.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://embedded.xym.work/01-ji-suan-shi-shen-me/1_1program_basic/1_c/9struct.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://embedded.xym.work/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://embedded.xym.work/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/01-ji-suan-shi-shen-me/1_1program_basic/1_c/9struct.md`).

You may also use `Accept: text/markdown` header for content negotiation.