Print stuff and see which cases you miss.

Why do you ever want to return 43? You must return a digit.

It's difficult to tell without seeing your code. You can post your code here (see how) so we could check it, or you can ask for help in #cpp channel of Codewars Discord.

I can see a couple of problems with this code:

• It doesn't correctly handle 0 digits after the decimal point. The result shouldn't be muliplied by 10 in that case.
• It doesn't handle trailing spaces if there is also a decimal point.

First, copy whatever code you have to an editor.
Do a "RESET" on your solution within Codewars.
And then incorporate back your code into the scaffold.
I hope this fixes it.