Program to test the character type

Program 12) This program requests the user to enter a character and displays a message on the screen telling the user whether the character is an alphabet or digit, or any other special character.

This program receives a character from the keyboard and tests whether it is a letter or digit and prints out a message accordingly. These tests are done with the help of the following functions:
                                             isalpha(character)
                                              isdigit(character)
For example, isalpha assumes a value non-zero (TRUE) if the argument character contains an alphabet;
otherwise it assumes 0 (FALSE). Similar in the case with the function isdigit.


                                    PROGRAM

#include <stdio.h>
#include <ctype.h>
main( )
 {
        char character ;
        printf("Press any key\n") ;
        
        character = getchar ;
        if(isalpha(character) > 0)
           printf("The character is a letter.") ;
        else
            if(isdigit(character) >0 )
               printf("The character is a digit.") ;
            else
               printf("The character is not alphanumeric.") ;
        getch( ) ;
 }

Output:             Press any key
                         h
                         The character is a letter.
                         Press any key
                         5
                         The character is a digit.
                         Press any key
                         *
                         The character is not alphanumeric.


isalpha and isdigit. These character functions are contained in the file ctype.h and therefore the statement
                         #include <ctype.h>
must be included in the program.