Pattern/ route function for multiple addresses

[ceceba223]

Hey,
I'm looking for a way to send multiple key presses via osc. The addresses are supposed to look something like this:

/Key20

/Key21

I can achieve this by writing one address at a time like this:

OSCMessage msg("/Key20");

But I need a function which works for all keys, so I modified it to look like this:

  char address_base = "/Key";
  address_base += key_id;
  OSCMessage msg(address_base);

However that returns an error:

C:\Users\Me\Documents\Arduino\libraries\OSCMessage/OSCMessage.h:112:2: note: candidate: OSCMessage::OSCMessage(const char*) <near match>
  OSCMessage (const char * _address);
  ^~~~~~~~~~
C:\Users\Me\Documents\Arduino\libraries\OSCMessage/OSCMessage.h:112:2: note:   conversion of argument 1 would be ill-formed:

exit status 1

Compilation error: no matching function for call to 'OSCMessage(char&)'

From the documentation I guess the "route" function or the pattern matching could be helpful to me. But I don't quite understand it.
Any help is appreciated.