String auf Zeichen prüfen

[DeddyH]

Ungetestet:

Delphi-Quellcode:

function ValidPW(const s: string): Boolean;
var
  ContainsUpper: Boolean;
  ContainsLower: Boolean;
  ContainsNumber: Boolean;
  c: char;
begin
  ContainsUpper := false;
  ContainsLower := false;
  ContainsNumber := false;
  Result := false;
  for c in s do
    begin
      if CharInSet(c, ['0'..'9']) then
        ContainsNumber := true
      else if c = AnsiUpperCase(c) then
        ContainsUpper := true
      else if c = AnsiLowerCase(c) then
        ContainsLower := true;
      Result := ContainsUpper and ContainsLower and ContainsNumber;
      if Result then
        break;
    end;
end;