Why did turn an error-CodePudding

CodePudding user response:

Pay attention to spelling mistake

CodePudding user response:

reference 1/f, the truth is right or wrong response:

notice spelling mistakes

You can see what is wrong

CodePudding user response:

 equal_to_zero 
Equal_than_zero 

Samaller_than_zero 
Smaller_than_zero

Compare the

CodePudding user response:

Errors have, also don't see

Function definitions are equal_ than _zero
A function call is equal_to_zero

Function definitions are s a maller_than_zero
A function call is smaller_than_zero