running-code.md

Running Code

The default build task runs .vscode/run-active-problem.sh.

1. Choose A Problem File

Open a .cpp or .js file.

Supported files:

*.cpp
*.js

2. Add Input

Put sample input in:

workspace/input.txt

3. Run

Use one shortcut:

Environment	Shortcut
macOS custom local shortcut	Cmd + R
macOS default task	Cmd + Shift + B
Windows/Linux default task with Bash	Ctrl + Shift + B

4. Read Output

Program output is written to:

workspace/output.txt

The terminal also prints the file, language, runtime, and failures.

Runner Behavior

1. Active .cpp files compile with g++.
2. Active .js files run with Node.js.
3. If workspace/input.txt or workspace/output.txt is active, the runner reuses the current problem file.
4. If there is no current problem file, the runner uses the most recently modified non-empty .cpp or .js file.
5. Editing and saving a non-empty problem file makes it the current runner target.
6. If the active problem file is empty, the runner clears workspace/input.txt and workspace/output.txt.

Before running a task, VS Code saves dirty files first. This keeps Cmd + R accurate even when workspace/input.txt or workspace/output.txt is active.