Compare 02 — Dead band

Briefing

With one limit, a reading hovering around 80 makes the lamp flicker. A dead band fixes that: the lamp switches ON above 80, OFF below 70, and keeps whatever it was doing between 70 and 80. That "keeps what it was doing" needs memory. Exactly 70 and exactly 80 are inside the band. As in Compare 01, comparisons are written in the Code tab.

Objectives

• Above 80: HIGH_TEMP_LAMP on
• Below 70: HIGH_TEMP_LAMP off
• Between 70 and 80 (inclusive): the lamp keeps its state, on the way up and on the way down

I/O Table

Your program will be tested against:

All test cases run automatically when you submit. Assertions are hidden until you pass.

1. #1Temperature 50 → lamp off

   Below the band the lamp is off

2. #2Temperature 85 → lamp on

   Above 80 the lamp switches on

3. #385 then 75 → lamp stays on

   Falling into the band keeps the lamp on

4. #485, 75, then 69 → lamp off

   Below 70 the lamp switches off, and stays off back inside the band

5. #550 then 75 → lamp still off

   Rising into the band does not switch the lamp on

6. #6Exactly 80 and exactly 70 keep the state

   The edges of the band are inside the band