delphi中文数字转阿拉伯数字

项目中使用，网上找不到，自己写了一个

type
  TChnnum=record
    rate:integer;
    str:string;
  end;
  const chndigit:array[0..9]of Char=('零','一','二','三','四','五','六','七','八','九');

function TTabbedwithNavigationForm.ChnToNum (s:string):Integer;
var chnnums:array[0..3] of TChnnum ;
i,j:integer;
a,b,x:integer;
str:string ;
begin
 chnnums[0].rate:=10;chnnums[0].str:='十';
 chnnums[1].rate:=100;chnnums[1].str:='百';
 chnnums[2].rate:=1000;chnnums[2].str:='千';
 chnnums[3].rate:=10000;chnnums[3].str:='万';
//从左开始对字
str:=s;
x:=0;
i:=0;
if str[1] ='十' then begin
x:=10;
inc(i);
end;


while i begin
a:=0;b:=1;
inc(i);
  for j:=Low(chndigit) to High(chndigit) do
  if str[i] =chndigit[j] then begin
     if j=0 then inc(i)
     else begin
      a:=j;
      break;
     end;
  end  ;
  if (a=0 ) and (i=1) then a:=1;
  if i< s.Length then begin
  inc(i);
    for j:= Low(chnnums) to High(chnnums) do
      if str[i]= chnnums[j].str  then begin
       b:= chnnums[j].rate;
       break;
      end;
   end;
  x:=x+a*b;
end;
  Result:=x;


end;