检查浮点数精确位数
function NumericPrecCheck(compnentCaption,text:string;numericPrec:integer;maxLimit:Integer):string;
var
E: extended;
begin
Result:='';
try
text:=Trim(text);
E:=StrToFloat(text);
if E>maxInt then
begin
Result:=compnentCaption+'超过范围'+inttostr(maxLimit)+', 请重新输入!';
end;
if ( pos( '.', text ) <> 0 ) and ( length( text ) - pos( '.', text ) >numericPrec ) then
begin
Result:=compnentCaption+'只能精确到小数点后' + IntToStr( numericPrec ) + '位,请重新输入!';
end
else
begin
Result:='格式正确';
end;
except
Result:=compnentCaption+'为数字,请重新输入!';
end;
end;
摘自 edisonfeng
补充:软件开发 , Delphi ,