Review week 45: debugging

This week was about errors that are loud and errors that stay silent. For review:

• Error codes: 39 numbers from 0 to 38. In everyday play mostly 4, 6, 9, 18, 20 and 25. A second chip only sees 0 or 1 via Error, and the line via LineNumber.
• Silent errors: NaN from Average, −inf from Maximum, the program end without a loop and wrong units. sgt ok t 0 catches NaN and −inf for temperatures.
• Probes: write intermediate values to the housing, to displays or into a Logic Memory, count edges.
• Simulator: breakpoint, step and tick, history, Δ/tick and couplings.
• Test cases: normal case, edge case, failure – as a table before you program, and all of them after every change.

You pass from 60 %.