$ include "seed7_05.s7i";

const func string: stripComment (in string: line) is func
  result
    var string: lineWithoutComment is "";
  local
    var integer: lineEnd is 0;
    var integer: pos is 0;
  begin
    lineEnd := length(line);
    for pos range 1 to length(line) do
      if line[pos] in {'#', ';'} then
        lineEnd := pred(pos);
        pos := length(line);
      end if;
    end for;
    lineWithoutComment := line[.. lineEnd];
  end func;

const proc: main is func
  local
    var string: stri is "apples, pears # and bananas\n\
                        \apples, pears ; and bananas";
    var string: line is ""
  begin
    writeln(stri);
    writeln("====>");
    for line range split(stri, '\n') do
      writeln(stripComment(line));
    end for;
  end func;