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The central idea:
Since it is a function, on the three elements to consider:
1. The function name
Check the function name if there are problems
2. arguments
Check the parameters match
the main attention here is that if the class is a reference to another file to see if the appropriate header files included
3. Return value
Check the return value matches
what type of return on what type of return
tips:
Silent people is likely to be IDE problems -> To have confidence in their code -
