@ -13,8 +13,8 @@ extension NumExt on num {
BorderRadius get radius => BorderRadius.circular(this.w);
///每三位数加逗号
String get comma {
String _num = this.toString();
String comma ({int fixed}){
String _num = this.toStringAsFixed(fixed??2);
String str = '';
int count = 0;
if (_num.indexOf('.') == -1) {