A weather station sends its temperature readings as text, like "12.5", "7" or "-3.7". The display can only show whole degrees.
Task: write whole_degrees(readings). readings is a list of strings, and each string is a number. Return the readings as whole numbers, as a plain list, in the same order.
Turn each reading into a whole number by cutting off everything after the decimal point. Don't round. So "12.9" becomes 12, and "-3.7" becomes -3.
There is always at least one reading.