获得中文每个字的拼音首字母

function get_py(st : string):string;
function GetPYIndexChar( hzchar:string):char;
begin  //的到一个汉字的拼音头个字母
  case WORD(hzchar[1]) shl 8 + WORD(hzchar[2]) of
    $B0A1..$B0C4 : result := 'A';
    $B0C5..$B2C0 : result := 'B';
    $B2C1..$B4ED : result := 'C';
    $B4EE..$B6E9 : result := 'D';
    $B6EA..$B7A1 : result := 'E';
    $B7A2..$B8C0 : result := 'F';
    $B8C1..$B9FD : result := 'G';
    $B9FE..$BBF6 : result := 'H';
    $BBF7..$BFA5 : result := 'J';
    $BFA6..$C0AB : result := 'K';
    $C0AC..$C2E7 : result := 'L';
    $C2E8..$C4C2 : result := 'M';
    $C4C3..$C5B5 : result := 'N';
    $C5B6..$C5BD : result := 'O';
    $C5BE..$C6D9 : result := 'P';
    $C6DA..$C8BA : result := 'Q';
    $C8BB..$C8F5 : result := 'R';
    $C8F6..$CBF9 : result := 'S';
    $CBFA..$CDD9 : result := 'T';
    $CDDA..$CEF3 : result := 'W';
    $CEF4..$D188 : result := 'X';
    $D1B9..$D4D0 : result := 'Y';
    $D4D1..$D7F9 : result := 'Z';
  else
    result := 'V';
  end;
end;
var
  s,s1,s2,zf: string;
  i,j,k     : integer;
begin
  zf:='';  k:=0;
  while length(st)>0 do
    begin
      k:=k+1;
      while (length(st)>0) and (st[1]<#160) do delete(st,1,1);
      if length(st)>1 then
        begin
          s1:=copy(st,1,2);
          delete(st,1,2);
        end;
      if length(s1)>1 then zf:=zf+GetPYIndexChar(s1);
      if length(zf)>6 then break;
      s1:='' ;
      if k>100 then
        begin
          zf:='XXX';
          break;
        end;
    end;
  result:=zf;
end;