Programs that use the isalpha() routine must include the ____ header file.
A)stdio.h
B)stdlib.h
C)string.h
D)ctype.h

Question

Quizplus · Accepted Answer

The isalpha() function is used to check if a character is an alphabetical character. This function is defined in the header file, so programs programs programs programs programs programs programs programs programs programs programs programs programs programs programs programs programs programs programs programs to use the isalpha() function, the header file must be included in the program.

Programs That Use the Isalpha() Routine Must Include the ____