No nonsense, dry goods.
Solution:
Step 1: Right-click the cpp file and select properties.
Step 2: Select the precompiled header.
Step 3: Set the precompiled header to: Do not use the precompiled header.
Step 4: Apply --> Confirm --> Recompile.
End:
Sharing is also a way to deepen your understanding of the problem again. It may not be comprehensive, but it is definitely useful and will continue to be improved later~