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

#define log_int(n) printf("%s == %d\n", (#n), (n))

int main(int argc, char* argv[]) {
    // malloc space for 1 integer and store the address
    // of the new integer in a_n
    int* a_n = malloc(sizeof(*a_n));
    // bad code quality, but compiles
    // int* a_n = malloc(sizeof(int));
    
    // bad code quality: not obvious why we used 4
    //                   could cause problems on other platforms
    // int* a_n = malloc(4);
    
    // bad code quality: unneeded cast
    // int* a_n = (int*)malloc(sizeof(*a_n));

    // no initial value, this is random data from memory
    //log_int(*a_n);

    // assign a value to the address a_n
    *a_n = 4;
    // print assigned value
    log_int(*a_n);

    free(a_n);
    return EXIT_SUCCESS;
}
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