Question

#warning and #error are two preprocessor directives and the job of #warning is to throw a message to the Arduino IDE. However, which of these preprocessor directives stops the compilation process?

(a) #error

(b) #warning

(c) #include

(d) #define

The question was posed to me in an international level competition.

My query is from Preprocessing in chapter Arduino Programming of Arduino

Answer 1

The correct option is (a) #error

Explanation: As explained in the question, the job of the #warning preprocessor directive is to throw a message to the Arduino IDE as a warning to notify the user or the programmer of something. However, it does not hinder in the compilation process.