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

// { "hello", "world" }

bool create_string(char** a_result) {
    // note: we want sizeof(char), so dereference twice
    *a_result = malloc(sizeof(**a_result) * 4);
    (*a_result)[0] = 'a';
    (*a_result)[1] = 'b';
    // pitfall: order of operations can cause trouble
    // *(a_result[i]) != (*a_result)[i]
    // C interprets *a_result[i] as the left
    (*a_result)[2] = 'c';
    (*a_result)[3] = '\0';
    return true;
}

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