Is there a C++ Set construct?

Projects Programming
1

Hi, I am from many many years of Pascal and we have "Sets" such that I can see if a number is in a range. Is there anything like this in Arduino/C++

x:=6;
if x in [1,2,3,5,7,8,9] then.... This would be False

We also can use a range as in.

if x in [1..3,5..9] then.... This would also be False

How can I do this in C++ without using multiple single if-checks?

3

OK, thanks. When I searched online looking for "Sets" it came up with all manner of things, very few with anything to do with programming. :slight_smile:

4 
switch(x)
{
  case 1 ... 9:
     Do stuff;
     break;
  case 10 ... 12:
     Do stuff;
     break;

This is kind of close.

5

Arduino switch case allows number ranges but it's not in the Arduino Reference.

From the forum, this works with Arduino:

int var = DMXSerial.read(FIVE);
    switch (var) {
    case 0 ... 5:
      runBlack();
      break;
    case 6 ... 10:
      runR();
      break;
    default: 
      // if nothing else matches, do the default
      // default is optional
      break;
    }

Tables can be great for speed (love em!) but do take memory though that can be flash instead of RAM. If you can come up with a fast formula (or don't need great speed and have a formula) then it's better to do that.

if ( serial.available() )
{
myDataChar = serial.read();

if ( myDataChar >= '0' & myDataChar <= '9' )
{
// serial data is a numeral
}
}

6

Yes, there is. In the Boost library.