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

// okay to copy/adapt

#define log_addr(n) printf("%s == %p\n", #n, (void*)(n))


void return_string_by_address(char** a_string) {
    // a_string should contain "Hi"
    *a_string = malloc(sizeof(**a_string) * 3);
    log_addr(*a_string);
    (*a_string)[0] = 'H';
    // *a_string[1] === *(a_string[1])
    (*a_string)[1] = 'i';
    (*a_string)[2] = '\0';
}


int main(int argc, char* argv[]) {
    char* result;
    return_string_by_address(&result);
    printf("%s\n", result);
    free(result);
    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */