Problem Set 4

What to Do

1. Log into code.cs50.io using your GitHub account
2. Run update50 in your codespace’s terminal window to ensure your codespace is up-to-date and, when prompted, click Rebuild now
3. Submit one of:
   • this version of Filter if feeling less comfortable
   • this version of Filter if feeling more comfortable
4. Submit Recover

If you submit both versions of Filter, we’ll record the higher of your two scores.

When to Do It

By the College Board’s AP deadlines for the 2022–2023 academic year.

Advice

• Try out any of David’s programs from Week 4.
• If you see any errors when compiling your code with make, focus first on fixing the very first error you see, scrolling up as needed. If unsure what it means, try asking help50 for help. For instance, if trying to compile hello, and

  make filter
  

  is yielding errors, try running

  help50 make filter
  

  instead!