A code to draw other codes together

Suppose I have 3 m-codes:

code1.m code2.m code3.m

and I want a program to "draw them together" in the sense that when we run the program, we are prompted with, say, "enter code:", then the user types in say "code3" and then code3.m is run.

I am pretty sure there is a simple code to do that, though I can't remember it.

Thank you in advance!

Answer 1

[Fangjun Jiang]

whilte true
  Code=input('enter code: ','s');
  if strcmpi(Code,'quit')
     break;
  else
     try
       run(Code);
     catch
       error('unrecognized code name');
     end
  end
end