/*In Abap - the language for SAP-Systems - one can describe a range of numbers with an object/list of four fields: sign option low high sign is I or E means Including Exluding. option has many oppurtunities, we might take EQ like equal, BT like between GT > or LT <. low and high are the boundaries. If option is EQ or GT or LT high may not be filled or ignored. Now given a domain 1 to 1000... or as u want 95, 96 maybe I EQ 95 I EQ 96 or I BT 95 96 A bit more 5,6....12, 14,15,...18,20,...900 I GT 4 I LT 901 E EQ 13 E EQ 19 easy challenge: user enters 3 lines like I BT 3 11 as one line example and the progs output are the numbers. for runaways: User enters a set of numbers within the domain and the prog tries to describe the set with the given Syntax but as little lines as possible.*/ import java.io.*; import java.util.Scanner; public class Program { public static void main(String[] args){ Scanner in = new Scanner(System.in); String s,option,sign; int low =0,high =100; HashSet hs=new HashSet(100); int st =low, end =high; while(in.hasNext()) { s = in.nextLine(); System.out.println("\n" + s.toUpperCase()); String c[] = s.split(" "); try { if(c[0].equalsIgnoreCase("I") ||c[0].equalsIgnoreCase("E")) sign = c[0].toUpperCase(); else throw new Exception("c0"); if(c[1].equalsIgnoreCase("EQ") || c[1].equalsIgnoreCase("GT")|| c[1].equalsIgnoreCase("LT")|| c[1].equalsIgnoreCase("BT")) option = c[1].toUpperCase(); else throw new Exception("c1"); try{ low = Integer.parseInt(c[2]); } catch(Exception e) { throw new Exception("low value missing:\n"); } switch(option) { case "EQ": if(sign.equals("I")) { System.out.println("Included : "+low); hs.add(low); } else System.out.println("Excluded " + low+ ":" + hs.remove(low)); break; case "GT": st = low+1; end = high; if(sign.equals("I")) for(int i=st; i<=end; i++) hs.add(i); else for(int i=low; i<=high; i++) hs.remove(i); break; case "LT": if(sign.equals("I")) { for(int i=st; i it = hs.iterator(); while(it.hasNext()) System.out.print(it.next()+" "); } }

Oma falk's Abap chl.