Question

The purpose of the preprocessor directive #error is that ____________

(a) It rectifies any error present in the code

(b) It rectifies only the first error which occurs in the code

(c) It causes the preprocessor to report a fatal error

(d) It causes the preprocessor to ignore an error

The question was asked during an online exam.

My question comes from Conditional Preprocessor Directives topic in section C Preprocessor of C

Answer 1

The correct answer is (c) It causes the preprocessor to report a fatal error

Best explanation: #error is a preprocessor directive which causes the preprocessor to report a fatal error. The tokens which form the rest of the line after #error are used as the error message.