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

int main(int argc, char* argv[]) {

    int n = 5;

    int* a_n = &n;
    // Type «int*» means address of an int.
    // a_n is a variable name, which by our custom will mean address of n.
    // &n means "address of n.
    
    // There other address types:
    // ∙ char* means address of a char.
    // ∙ float* means address of a float.
    // ∙ void* means address of ANYTHING.
    
    printf("  n == %d\n", n);
    printf("a_n == %p\n", (void*)a_n);  // "%p" stands for "address"  :/
    printf(" &n == %p\n", (void*)&n);   // "%p" stands for "address"  :/

    int* a_of_a_number = a_n;
    printf("a_of_a_number == %p\n", (void*)a_of_a_number);

    return EXIT_SUCCESS;
}
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