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

int main(int argc, char* argv[]) {
    int    n = 5;
    int* a_n = &n;    // ⇒ a_n is the address of an int, and is initialized to the address of n.
//  └┬─┘ └┬┘
//  type name

// This would be equivalent and is seen in some books.
    int *a_n = &n;    // ⇒ a_n is the address of an int, and is initialized to the address of n.
//  └─┬─┘└┬┘
//  type name

    *a_n = 6;  // ⇒ Store 6 at address a_n.

    int *a_n = 6;  // ERROR:  Trying to initialize a variable of type int* with an int.

// This is Prof. Lu's preference.
    int * a_n = &n;    // Because * is an operator and we put spaces around operators.
//  └─┬─┘ └┬┘
//  type name

    return EXIT_SUCCESS;
}
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