#ifndef LIBFT_A #define LIBFT_A /* The isalpha() function tests for any character for which isupper(3) or islower(3) is true. */ int ft_isalpha(int c); /* The ft_isdigit() function tests for a decimal digit character. Regardless of locale, this includes the following characters only: '0' '1' '2' '3' '4' '5' '6' '7' '8' '9' */ int ft_isdigit(int c); /* The ft_isalnum() function tests for any character for which isalpha(3) or isdigit(3) is true. */ int ft_isalnum(int c); /* The ft_isascii() function tests for an ASCII character, which is any character between 0 and octal 0177 inclusive. */ int ft_isascii(int c); #endif