As shown in the figure: test is the name of the file, and the error message is displayed after * * *

FATAL ERROR L210

Solution: Google and download the file c51fps.lib, then find the Lib of your keil folder. For example, my address is: D:\Keil C51 v6.12\c5\LIB

Different versions may have different folder names. If you’re not sure, copy more and put them all.

Reason: This is the library of floating-point operation. The decimal KEIL2 download package is used. The library without decimal operation needs to be downloaded by yourself.