Expand shorthand inputs (I.E a-z becomes a b c d ... x y z, etc)

expansion.c

#include <stdio.h>

int main() {
    int c;
    char line[] = "";

    for (int i = 0; (c = getchar()) != EOF; i++) {
        line[i] = c;

        if (c == '\n') {
            i = -1; // ++ will set this back to 0, probably a better way?
            line[0] = '\0';
            continue;
        }

        if (i < 2) {
            continue;
        }

        if (line[i - 1] == '-') {
            int end = line[i];

            for (int pos = line[i - 2]; pos <= end; pos++) {
                printf("%c\n", pos);
            }
        }
    }
}