🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 0 (from laksa001)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa000.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://pythontutor.com/cpp.html\')), getAhrefsUnparsedNoserviceFromURL(\'https://pythontutor.com/cpp.html\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/pythontutor.com\/cpp.html","crawl_time":1775790934,"first_indexed_time":1629589168,"http_code":200,"src_unparsed":"com,pythontutor!\/cpp.html s443","src_root_hash":"3858471113823220000","history_drop_reason":null,"meta_title":"Visualize C++ Code - C++ Visualizer, Tutor, and Debugger with AI Help","meta_descriptions":["C++ visualizer, visual debugger, and AI tutor - the only tool that lets you visually debug your C++ code step-by-step (also debug Python, JavaScript, Java, and C code)"],"attrs_boilerpipe_text":"Please wait ... your code is running (up to 10 seconds)\nWrite code in\n1\n2\n3\n4\nint\nmain\n(\n)\n{\nreturn\n0\n;\n}\nAre you 60 or older?\nHelp our research\non older adults learning to code\nteachers\nget\nfree access\nto ad-free\/AI-free mode\nNEW:\nC\/C++ now supports user input via stdin and showing std::string\nC\/C++ options\n(\nclick for help\n):\n(currently no basic options)\nshow advanced options\nhide all code examples\nC++ Examples\nBasic\n|\nPass by ref\n|\nClass\n|\nClass pointer\n|\nDate class\n|\nInheritance\n|\nVirtual method","attrs_markdown":"[C++ Tutor](https:\/\/pythontutor.com\/index.html)\n\n[Python Tutor](https:\/\/pythontutor.com\/python-compiler.html) [Java Tutor](https:\/\/pythontutor.com\/java.html) [C Tutor](https:\/\/pythontutor.com\/c.html) [JavaScript Tutor](https:\/\/pythontutor.com\/javascript.html)\n\n[Teacher Mode](https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSfvs94n1d3ZaXDgytT7JhXBafS8q12ucr9YNiZCBakCQ-w6LA\/viewform?usp=dialog) [Docs](https:\/\/docs.google.com\/document\/d\/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU\/) [Impact](https:\/\/pythontutor.com\/index.html#impact) [Donate](https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSeVehBoLGJhbB9GGSh5Bj8AWa0rF5NCMjLCtuA3rhaEJlsRlg\/viewform?usp=sf_link)\n\n[Python Tutor](https:\/\/pythontutor.com\/index.html)\n\n[Java Tutor](https:\/\/pythontutor.com\/java.html) [C Tutor](https:\/\/pythontutor.com\/c.html) [C++ Tutor](https:\/\/pythontutor.com\/cpp.html) [JavaScript Tutor](https:\/\/pythontutor.com\/javascript.html)\n\n[Teacher Mode](https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSfvs94n1d3ZaXDgytT7JhXBafS8q12ucr9YNiZCBakCQ-w6LA\/viewform?usp=dialog) [Docs](https:\/\/docs.google.com\/document\/d\/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU\/) [Impact](https:\/\/pythontutor.com\/index.html#impact) [Donate](https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSeVehBoLGJhbB9GGSh5Bj8AWa0rF5NCMjLCtuA3rhaEJlsRlg\/viewform?usp=sf_link)\n\n[Teacher Mode](https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSfvs94n1d3ZaXDgytT7JhXBafS8q12ucr9YNiZCBakCQ-w6LA\/viewform?usp=dialog) [Docs](https:\/\/docs.google.com\/document\/d\/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU\/) [Impact](https:\/\/pythontutor.com\/index.html#impact) [Donate](https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSeVehBoLGJhbB9GGSh5Bj8AWa0rF5NCMjLCtuA3rhaEJlsRlg\/viewform?usp=sf_link)\n\n# C++ visualizer, visual debugger, and AI tutor\nThe only tool that lets you visually debug your C++ code step-by-step.\n\nPlease wait ... your code is running (up to 10 seconds)\n\nWrite code in\n\n1\n\n2\n\n3\n\n4\n\nint main() {\n\nreturn 0;\n\n}\n\nXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n\nVisualize Execution  Are you 60 or older? [**Help our research**](https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSc7VY-E0Z543viybFvgn1yMZGg79nLUrkwgjQAsAoUB1uPK1A\/viewform?usp=dialog) on older adults learning to code\n\nteachers get [**free access**](https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSfvs94n1d3ZaXDgytT7JhXBafS8q12ucr9YNiZCBakCQ-w6LA\/viewform?usp=dialog) to ad-free\/AI-free mode\n\nNEW: C\/C++ now supports user input via stdin and showing std::string\n\n**C\/C++ options** ([click for help](https:\/\/docs.google.com\/document\/d\/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU\/edit?tab=t.0#bookmark=id.9kyub681p4yl)):\n\n(currently no basic options)\n\n[show advanced options](https:\/\/pythontutor.com\/cpp.html)\n\nvisualizer should\n\n[hide all code examples](https:\/\/pythontutor.com\/cpp.html)\n\nC++ Examples\n\n[Basic](https:\/\/pythontutor.com\/cpp.html) \\| [Pass by ref](https:\/\/pythontutor.com\/cpp.html) \\| [Class](https:\/\/pythontutor.com\/cpp.html) \\| [Class pointer](https:\/\/pythontutor.com\/cpp.html) \\| [Date class](https:\/\/pythontutor.com\/cpp.html) \\| [Inheritance](https:\/\/pythontutor.com\/cpp.html) \\| [Virtual method](https:\/\/pythontutor.com\/cpp.html)\n\n🤖 Greetings, human! 🤖\n\nI'm a new AI Tutor ready to help you with C++.  \n  \nYou have not written any code yet, so feel free to ask me general questions about C++. **If you write some code above**, then I can answer specific questions about your code.\n\n🛠️ Instructions\n\nEdit\n\nSend\n\nReset chat\n\nAI Tutor may be inaccurate. Scroll up and click **Edit and re-send** to generate a *different* AI response.\n\nTips for good questions:\n\n- Edit your code to be [as small as possible](https:\/\/stackoverflow.com\/help\/minimal-reproducible-example).\n- [Be specific](https:\/\/www.sscce.org\/) and ask about specific parts of your code.\n- Include enough context, such as instructions for your assignment.\n\n## Python Tutor\nKeep this tool free for everyone\\! [Donate](https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSeVehBoLGJhbB9GGSh5Bj8AWa0rF5NCMjLCtuA3rhaEJlsRlg\/viewform?usp=sf_link)\n\n### Languages\n- [Python](https:\/\/pythontutor.com\/python-compiler.html)\n- [Java](https:\/\/pythontutor.com\/java.html)\n- [C](https:\/\/pythontutor.com\/c.html) and [C++](https:\/\/pythontutor.com\/cpp.html)\n- [JavaScript](https:\/\/pythontutor.com\/javascript.html)\n\n### About\n- [Teacher Mode](https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSfvs94n1d3ZaXDgytT7JhXBafS8q12ucr9YNiZCBakCQ-w6LA\/viewform?usp=dialog)\n- [Docs](https:\/\/docs.google.com\/document\/d\/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU\/)\n- [Impact](https:\/\/pythontutor.com\/index.html#impact)\n\n### Help\n- [Report a Bug](https:\/\/docs.google.com\/document\/d\/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU\/edit?tab=t.0#bookmark=id.15szxjmdeghv)\n- [Unsupported Features](https:\/\/docs.google.com\/document\/d\/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU\/edit?tab=t.0#bookmark=id.foejiogbhizj)\n- [Terms of Service](https:\/\/docs.google.com\/document\/d\/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU\/edit?tab=t.0#bookmark=id.zaiomiz3ejh9)\n- [Privacy Policy](https:\/\/docs.google.com\/document\/d\/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU\/edit?tab=t.0#bookmark=id.zaiomiz3ejh9)","attrs_readable_markdown":"Please wait ... your code is running (up to 10 seconds)\n\nWrite code in\n\n1\n\n2\n\n3\n\n4\n\nint main() {\n\nreturn 0;\n\n}\n\nAre you 60 or older? [**Help our research**](https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSc7VY-E0Z543viybFvgn1yMZGg79nLUrkwgjQAsAoUB1uPK1A\/viewform?usp=dialog) on older adults learning to code\n\nteachers get [**free access**](https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSfvs94n1d3ZaXDgytT7JhXBafS8q12ucr9YNiZCBakCQ-w6LA\/viewform?usp=dialog) to ad-free\/AI-free mode\n\nNEW: C\/C++ now supports user input via stdin and showing std::string\n\n**C\/C++ options** ([click for help](https:\/\/docs.google.com\/document\/d\/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU\/edit?tab=t.0#bookmark=id.9kyub681p4yl)):\n\n(currently no basic options)\n\n[show advanced options](https:\/\/pythontutor.com\/cpp.html)\n\n[hide all code examples](https:\/\/pythontutor.com\/cpp.html)\n\nC++ Examples\n\n[Basic](https:\/\/pythontutor.com\/cpp.html) \\| [Pass by ref](https:\/\/pythontutor.com\/cpp.html) \\| [Class](https:\/\/pythontutor.com\/cpp.html) \\| [Class pointer](https:\/\/pythontutor.com\/cpp.html) \\| [Date class](https:\/\/pythontutor.com\/cpp.html) \\| [Inheritance](https:\/\/pythontutor.com\/cpp.html) \\| [Virtual method](https:\/\/pythontutor.com\/cpp.html)","meta_canonical":null}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📄

INDEXABLE

✅

CRAWLED

7 days ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0.3 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property	Value
URL	https://pythontutor.com/cpp.html
Last Crawled	2026-04-10 03:15:34 (7 days ago)
First Indexed	2021-08-21 23:39:28 (4 years ago)
HTTP Status Code	200
Meta Title	Visualize C++ Code - C++ Visualizer, Tutor, and Debugger with AI Help
Meta Description	C++ visualizer, visual debugger, and AI tutor - the only tool that lets you visually debug your C++ code step-by-step (also debug Python, JavaScript, Java, and C code)
Meta Canonical	null
Boilerpipe Text	Please wait ... your code is running (up to 10 seconds) Write code in 1 2 3 4 int main ( ) { return 0 ; } Are you 60 or older? Help our research on older adults learning to code teachers get free access to ad-free/AI-free mode NEW: C/C++ now supports user input via stdin and showing std::string C/C++ options ( click for help ): (currently no basic options) show advanced options hide all code examples C++ Examples Basic \| Pass by ref \| Class \| Class pointer \| Date class \| Inheritance \| Virtual method
Markdown	[C++ Tutor](https://pythontutor.com/index.html) [Python Tutor](https://pythontutor.com/python-compiler.html) [Java Tutor](https://pythontutor.com/java.html) [C Tutor](https://pythontutor.com/c.html) [JavaScript Tutor](https://pythontutor.com/javascript.html) [Teacher Mode](https://docs.google.com/forms/d/e/1FAIpQLSfvs94n1d3ZaXDgytT7JhXBafS8q12ucr9YNiZCBakCQ-w6LA/viewform?usp=dialog) [Docs](https://docs.google.com/document/d/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU/) [Impact](https://pythontutor.com/index.html#impact) [Donate](https://docs.google.com/forms/d/e/1FAIpQLSeVehBoLGJhbB9GGSh5Bj8AWa0rF5NCMjLCtuA3rhaEJlsRlg/viewform?usp=sf_link) [Python Tutor](https://pythontutor.com/index.html) [Java Tutor](https://pythontutor.com/java.html) [C Tutor](https://pythontutor.com/c.html) [C++ Tutor](https://pythontutor.com/cpp.html) [JavaScript Tutor](https://pythontutor.com/javascript.html) [Teacher Mode](https://docs.google.com/forms/d/e/1FAIpQLSfvs94n1d3ZaXDgytT7JhXBafS8q12ucr9YNiZCBakCQ-w6LA/viewform?usp=dialog) [Docs](https://docs.google.com/document/d/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU/) [Impact](https://pythontutor.com/index.html#impact) [Donate](https://docs.google.com/forms/d/e/1FAIpQLSeVehBoLGJhbB9GGSh5Bj8AWa0rF5NCMjLCtuA3rhaEJlsRlg/viewform?usp=sf_link) [Teacher Mode](https://docs.google.com/forms/d/e/1FAIpQLSfvs94n1d3ZaXDgytT7JhXBafS8q12ucr9YNiZCBakCQ-w6LA/viewform?usp=dialog) [Docs](https://docs.google.com/document/d/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU/) [Impact](https://pythontutor.com/index.html#impact) [Donate](https://docs.google.com/forms/d/e/1FAIpQLSeVehBoLGJhbB9GGSh5Bj8AWa0rF5NCMjLCtuA3rhaEJlsRlg/viewform?usp=sf_link) # C++ visualizer, visual debugger, and AI tutor The only tool that lets you visually debug your C++ code step-by-step. Please wait ... your code is running (up to 10 seconds) Write code in 1 2 3 4 int main() { return 0; } XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Visualize Execution Are you 60 or older? [Help our research](https://docs.google.com/forms/d/e/1FAIpQLSc7VY-E0Z543viybFvgn1yMZGg79nLUrkwgjQAsAoUB1uPK1A/viewform?usp=dialog) on older adults learning to code teachers get [free access](https://docs.google.com/forms/d/e/1FAIpQLSfvs94n1d3ZaXDgytT7JhXBafS8q12ucr9YNiZCBakCQ-w6LA/viewform?usp=dialog) to ad-free/AI-free mode NEW: C/C++ now supports user input via stdin and showing std::string C/C++ options ([click for help](https://docs.google.com/document/d/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU/edit?tab=t.0#bookmark=id.9kyub681p4yl)): (currently no basic options) [show advanced options](https://pythontutor.com/cpp.html) visualizer should [hide all code examples](https://pythontutor.com/cpp.html) C++ Examples [Basic](https://pythontutor.com/cpp.html) \\| [Pass by ref](https://pythontutor.com/cpp.html) \\| [Class](https://pythontutor.com/cpp.html) \\| [Class pointer](https://pythontutor.com/cpp.html) \\| [Date class](https://pythontutor.com/cpp.html) \\| [Inheritance](https://pythontutor.com/cpp.html) \\| [Virtual method](https://pythontutor.com/cpp.html) 🤖 Greetings, human! 🤖 I'm a new AI Tutor ready to help you with C++. You have not written any code yet, so feel free to ask me general questions about C++. If you write some code above, then I can answer specific questions about your code. 🛠️ Instructions Edit Send Reset chat AI Tutor may be inaccurate. Scroll up and click Edit and re-send to generate a different AI response. Tips for good questions: - Edit your code to be [as small as possible](https://stackoverflow.com/help/minimal-reproducible-example). - [Be specific](https://www.sscce.org/) and ask about specific parts of your code. - Include enough context, such as instructions for your assignment. ## Python Tutor Keep this tool free for everyone\! [Donate](https://docs.google.com/forms/d/e/1FAIpQLSeVehBoLGJhbB9GGSh5Bj8AWa0rF5NCMjLCtuA3rhaEJlsRlg/viewform?usp=sf_link) ### Languages - [Python](https://pythontutor.com/python-compiler.html) - [Java](https://pythontutor.com/java.html) - [C](https://pythontutor.com/c.html) and [C++](https://pythontutor.com/cpp.html) - [JavaScript](https://pythontutor.com/javascript.html) ### About - [Teacher Mode](https://docs.google.com/forms/d/e/1FAIpQLSfvs94n1d3ZaXDgytT7JhXBafS8q12ucr9YNiZCBakCQ-w6LA/viewform?usp=dialog) - [Docs](https://docs.google.com/document/d/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU/) - [Impact](https://pythontutor.com/index.html#impact) ### Help - [Report a Bug](https://docs.google.com/document/d/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU/edit?tab=t.0#bookmark=id.15szxjmdeghv) - [Unsupported Features](https://docs.google.com/document/d/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU/edit?tab=t.0#bookmark=id.foejiogbhizj) - [Terms of Service](https://docs.google.com/document/d/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU/edit?tab=t.0#bookmark=id.zaiomiz3ejh9) - [Privacy Policy](https://docs.google.com/document/d/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU/edit?tab=t.0#bookmark=id.zaiomiz3ejh9)
Readable Markdown	Please wait ... your code is running (up to 10 seconds) Write code in 1 2 3 4 int main() { return 0; } Are you 60 or older? [Help our research](https://docs.google.com/forms/d/e/1FAIpQLSc7VY-E0Z543viybFvgn1yMZGg79nLUrkwgjQAsAoUB1uPK1A/viewform?usp=dialog) on older adults learning to code teachers get [free access](https://docs.google.com/forms/d/e/1FAIpQLSfvs94n1d3ZaXDgytT7JhXBafS8q12ucr9YNiZCBakCQ-w6LA/viewform?usp=dialog) to ad-free/AI-free mode NEW: C/C++ now supports user input via stdin and showing std::string C/C++ options ([click for help](https://docs.google.com/document/d/13_Bc-l2FKMgwPx4dZb0sv7eMfYMHhRVgBRShha8kgbU/edit?tab=t.0#bookmark=id.9kyub681p4yl)): (currently no basic options) [show advanced options](https://pythontutor.com/cpp.html) [hide all code examples](https://pythontutor.com/cpp.html) C++ Examples [Basic](https://pythontutor.com/cpp.html) \\| [Pass by ref](https://pythontutor.com/cpp.html) \\| [Class](https://pythontutor.com/cpp.html) \\| [Class pointer](https://pythontutor.com/cpp.html) \\| [Date class](https://pythontutor.com/cpp.html) \\| [Inheritance](https://pythontutor.com/cpp.html) \\| [Virtual method](https://pythontutor.com/cpp.html)
Shard	0 (laksa)
Root Hash	3858471113823220000
Unparsed URL	com,pythontutor!/cpp.html s443