Trouble implementing isalpha

Question

I\'ve been working on the readability problem in CS50. The first step is to create a way to count only the alphabetical characters. It suggests to use the isalpha f

Answer 1

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

int main(void)
{
    const char* s = get_string ("Text: \n");
    int count = 0;

    while(*s) count += !!isalpha(*s++);

    printf ("%d\n", count );
    return 0;
}