// 24T3 COMP1511 Week 7 Lecture 1
// A demonstration to show how arrays are stored in memory

#include <stdio.h>
#define MAX_LEN 4

void print_array(int *nums, int length);

void print_array2(int nums[], int length);

int main(void) {
    int array[MAX_LEN] = {9, 2, 3, 7};

    // array is the name of a block of memory
    // array is not a pointer variable and we can't change where it points to
    // but the name of the array decays to pointer to the first element 
    printf("array address: %p\n", array);

    int i = 0;
    while (i < MAX_LEN) {
         printf("Address of array[%d] = %p\n", i, &array[i]);
         i++;
    }

    print_array(array, MAX_LEN);
    print_array2(array, MAX_LEN);
    
    return 0;
}

// Can pass in array to function with pointer prototype
// Can use array indexes with pointers
void print_array(int *nums, int length) {
    printf("address of array in print_array: %p\n", nums);
    for (int i = 0; i < length; i++) {
        printf("%d\n", nums[i]);
    }
}

// Can pass in array to function with pointer prototype
// Can use array indexes with pointers
void print_array2(int nums[], int length) {
    printf("address of array in print_array: %p\n", nums);
    for (int i = 0; i < length; i++) {
        printf("%d\n", nums[i]);
    }
}