itch.io

We use the three functions here:

• bool is_int (<STRING_FUNCTION>) 
• string originaLverb()
• string original_noun1()

is_int will return true if its input is a string representation of an integer number. (Assuming English language) original_verb() will return the first word the player typed. original_noun1() will return the first noun in a 3 or more word sentence, or ALWAYS the 2nd word in a 2 word sentence.

The sample shown below may be more than you need, as it supports DIAL XXXX, and XXXX as accepted combination formats.

: done will stop executing, therefore we simply put the bad combination processing code underneath the conditional good combination processing code. Check out the code snippet.

I have documented this here:

https://adventuron.io/docs/tut/#_entering_a_numeric_combination

start_at  = office
locations {
   office : location "You are in an office." ;
}
objects {
   safe : scenery "a safe" start_at = "office" examine_message="The safe has a keypad.\nType DIAL XXXX (where XXXX is a number to try to open the safe).";
}
on_command {
   : if (is_present "safe") {
      : if (is_int (original_verb())) {
         : match "1234 _"  {
            : print "You enter the correct safe combination" ;
            : done ; // Stops it from matching anything else
         }
         : print "Wrong Combo" ;
      }
      : match "dial _"  {
         : if (is_int(original_noun1())) {
            : match "dial 1234"  {
               : print "You enter the correct safe combination" ;
               : done ; // Stops it from matching anything else
            }
            : print "Wrong Combo" ;
         }
         : else {
            : print "Please type DIAL XXXX (where XXXX is a number)." ;
         }
      }
   }
}