Question: How can I ignore leading zeros after decimal point (when number is -25.60 only get -2.6 and also when there is positive sing before number

How can I ignore leading zeros after decimal point (when number is -25.60 only get -2.6 and also when there is positive sing before number e.g +16.25 how do I get rid of + sign

I am using c++ regex

How can I ignore leading zeros after decimal point (when number is

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