module 5.0 control

1.Q: how many different things did you count? what were they? in what ways might computers be used to control different things in the supermarket?
A: I count 5 things, it is the time, card numbers, robot, price, and supermarket. We can use computer for check where food should be
2.Q:why is it useful to use computer rather than people to control things? what problems might there be if any of the computer systems fall in the supermarket?
A:computer is easy to count something and it helps to check something easier. If there is a small error it will be very hard to do.
3.Q:descibe the inputs fot the aother device that we have talked about so far. how do the supermarket doors and car park barriers know when to open? indentify other control systems that work automatically in this way.
A: in fact, quiet a lot of devices use buttons or keypads of some sort as of inputting instructions. After that, the device makes decisions about what it should do next.
4.Q:what would happen if the instrtuctions were wrong? these instructions assume that the car is in the right place. what would happen if the car were not there? how could they stop this happening?
A: maybe its not going to work make car accident will happen or there will be quiet big problem. It will be hard to find they have to make new information system.