switch statements 1

[shetlandbob]

Hia,

Ive got a large switch statement and was wondering if the following code is possible (ive tried compiling various versions but it complains at me.

switch ( value )
{
  case 1:  doStuff; break;
  case 2:  doStuff; break; 
  case 3:  doStuff; break;
  case 4:  doStuff; break;
  case 5:  doStuff; break;
  case 6:  doStuff; break;
  case 7:  doStuff; break;
  case 8:  doStuff; break;
  case 9:  doStuff; break;
  case 10:  doStuff; break;
[b][red]
  case 11 < 20: doStuff; break;
[/red][/b]
}

rather than to type all the conditions, i.e.

switch ( value )
{
  case 1:  doStuff; break;
  case 2:  doStuff; break; 
  case 3:  doStuff; break;
  case 4:  doStuff; break;
  case 5:  doStuff; break;
  case 6:  doStuff; break;
  case 7:  doStuff; break;
  case 8:  doStuff; break;
  case 9:  doStuff; break;
  case 10:  doStuff; break;
[b][red]
  case 11:
  case 12:
  case 13:
  case 14:
  case 15:
  case 16:
  case 17:
  case 18:
  case 19:
  case 20: doStuff; break;
[/red][/b]
}

}

 

[Cagliostro]

switch ( value )
{
case 1: doStuff; break;
case 2: doStuff; break;
case 3: doStuff; break;
case 4: doStuff; break;
case 5: doStuff; break;
case 6: doStuff; break;
case 7: doStuff; break;
case 8: doStuff; break;
case 9: doStuff; break;
case 10: doStuff; break;

default:
if( value > 11 && value < 20){ doStuff; }
break;

}

you can put in case statements only constants.

Ion Filipski

 

[shetlandbob]

i thought that would probably work but since I have multiple ranges that i want to do fixed routines on I wondering if there was another way to do it?

Thanks for the reply.

 

[Cagliostro]

there are no other ways. You may put in case statements only constants. No expressions, no variables, no functions.

Ion Filipski

 

[ArkM]

Some addition:
There was a wonderful SELECT statement in the old good PL/I - we can do that with PLI::SELECT...
It seems more expressive C/C++ way of coding: use if/switch mixture:

if (value >= 11 && value <= 20)
{
   // do it
}
else switch (value)
{
case 1: do that; break;
...
default:
...
}

But it is a matter of taste...