C / C++ / MFC

7-Jul-23 0:36

Interesting

Arduino Switch Case.

glennPattonWork330-Jun-23 3:46

30-Jun-23 3:46

Hi All,
Question about the Switch Case, I always treated the default section of a switch case a 'I have no idea what to do'

C++

for(i=0; i<= 100; i++)
{
  myServo.write(i);
  val = myServo.read();

  switch(val)
  {
    case 0:
    break;

   case 50:
   break;

   case 100:
   break;

 default:
//Here??
 break;
}

What appears to be happening it goes to the default when not caught by a catch. In the example when i = 50,
I need a method for catching values out side of the the range 1 to 100. As if the servo returns value outside of the range 0 to 100. Could I do with an if... if(( i < 0) && (i >100)) would this take care of anything 0 - 100??? I will try that.

jeron130-Jun-23 4:19

jeron1

30-Jun-23 4:19

In your instance (if this is the actual code), all values that are not 0, 50, or 100 will end up at the default statement. There's also a missing closing bracket for the switch statement, probably a copy/paste thing.

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Richard Andrew x6430-Jun-23 4:38

Richard Andrew x64

30-Jun-23 4:38

glennPattonWork3 wrote:
Could I do with an if... if(( i < 0) && (i >100))

I'm afraid that test will never be true. No value of i can be less than zero AND greater than 100 at the same time.

The difficult we do right away...
...the impossible takes slightly longer.

glennPattonWork330-Jun-23 10:12

30-Jun-23 10:12

It could, if it was val not i as I typed. Solved

Richard MacCutchan30-Jun-23 4:44

Richard MacCutchan

30-Jun-23 4:44

According to that code as written, any value that is not 0, 50 or 100, will go to the default statement. If that is not happening then there must be some other code that we can't see.

glennPattonWork330-Jun-23 10:12

30-Jun-23 10:12

That was the thing. Typing it out made me see it. Sigh | :sigh:

RedDk30-Jun-23 5:10

RedDk

30-Jun-23 5:10

... oops (wrong forum red-flag-accessed-by-moi)
For some reason I thought I was in the Lounge and have disappropriated some points that shouldn't be mine. Sorry!
Is "What do I do now" an appropriate C/C++/MFC question?
Thanks (answered myself),

glennPattonWork330-Jun-23 10:15

30-Jun-23 10:15

It was a need to think carefully, code blindness issue. I knew if I posted it the lounge I would get cruified by all and sundry needed somewhere to write think and take notice of the abortion I has created. OMG | :OMG:

glennPattonWork330-Jun-23 10:10

30-Jun-23 10:10

I am a dummy, I should have seen the problem, in fact I did as I was writing the question. I helps writing out the problem to see it more clearly, You can see the light starting to dawn in the last sentance problem solved. Thumbs Up | :thumbsup:

Boolean gates

Calin Negru24-Jun-23 16:32

24-Jun-23 16:32

Boolean gates are not type of transistor but rather cluster of transistors. Is that so? For example the schematic representation of the Not gate has just one line in one line out. A transistor means there is a high voltage line in high voltage line out, low voltage line in low voltage line out. Is the schematic representation showing only the relevant ins and outs?

PIEBALDconsult24-Jun-23 16:34

PIEBALDconsult

24-Jun-23 16:34

Well, I mean, it might be relays or something else other than transistors, but essentially correct.

Calin Negru24-Jun-23 22:20

24-Jun-23 22:20

Thanks PIEBALDconsult

CPallini25-Jun-23 19:58

CPallini

25-Jun-23 19:58

Yes, you might even build it yourself using some transistors. See, for instance: How to Build a NOR Gate with Transistors[^].

"In testa che avete, Signor di Ceprano?"
-- Rigoletto

Calin Negru28-Jun-23 1:50

28-Jun-23 1:50

Thanks

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