/*
 * implementations of functions in alphabet.h
 */
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include <ctype.h>

void build_alphabet(char alphachars[]) {
	/* 
	 * "sanity check" that no lowercase characters are negative ints
	 */
	for (int ch = SCHAR_MIN; ch < 0; ++ch) {
		if (islower(ch)) {
			printf("program failed sanity check for char %d\n", ch);
			exit(1);
		}
	}
	int count = 0;
	for (int ch = 0; ch <= SCHAR_MAX; ++ch) {
		if (islower(ch)) {
			alphachars[count++] = ch;
		}
	}
	alphachars[count] = '\0';
}

int char_to_index(char * alphabet, char ch) {
	/* FIXME your code goes here */
	/* if you use strchr you won't need a loop */
	return -1; /* FIXME temporary so compiler doesn't complain */
}

char index_to_char(char * alphabet, int index) {
	/* FIXME your code goes here */
	return ' '; /* FIXME temporary so compiler doesn't complain */
}