/* This code CONTAINS ERRORS and CRASHES when run; why it crashes is part of our class discussion when viewing this code */

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

int a[64];
int b[] = {1,2,3,4,5,6};
char c[] = "one";
const char d[] = "two";
const char *e = "nil";

void stackSnoop() {
    size_t i;
    size_t *p = &i;
    for(int i=-8; i<0; i+=1) {
        printf("%d: %016zx\n", i, p[i]);
    }
}
void codeAddresses() {
    void (*x)() = codeAddresses;
    stackSnoop();
    printf("This function's address: %p\n", x);
}

int main(int argc, char *argv[]) {
    printf("a (%p) -- size %zd\n", a, sizeof(a));
    printf("b (%p) -- size %zd\n", b, sizeof(b));
    printf("c (%p) -- size %zd\n", c, sizeof(c));
    printf("d (%p) -- size %zd\n", d, sizeof(d));
    printf("e (%p) -- size %zd\n", e, sizeof(e));

    codeAddresses();
    void (*x)() = codeAddresses;
    size_t *y = (size_t *)x;
    printf("y[0] = %016zx\n", y[0]);
    printf("y[1] = %016zx\n", y[1]);

    a[0] = -1; printf("a[0] = %d\n", a[0]);
    b[0] = -1; printf("b[0] = %d\n", b[0]);
    c[0] = -1; printf("c[0] = %hhd\n", c[0]);
    ((char *)d)[0] = -1; printf("d[0] = %hhd\n", d[0]);
    ((char *)e)[0] = -1; printf("e[0] = %hhd\n", e[0]);
    y[0] = 0; printf("y[0] = %016zx\n", y[0]);
    free(a);
    free(e);
    free(y);
    return 0;
}