Question

Which header declares several functions useful for testing and mapping characters?

(a) assert.h

(b) stdio.h

(c) ctype.h

(d) errno.h

This question was posed to me by my college director while I was bunking the class.

Enquiry is from Character Handling topic in portion String Operations in C of C

Answer 1

Correct answer is (c) ctype.h

Easiest explanation - The header <ctype.h> declares several functions useful for testing and mapping characters.