Arrays are not pointers

pointers.c

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

int main(){
    int array[3][4];
    int* pointer;
    int** double_pointer;
    int* random_allocation;

    pointer = (int*) malloc(12 * sizeof(int));
    double_pointer = (int**) malloc(3 * sizeof(int*));
    random_allocation = malloc(20 * sizeof(int));

    for(int i = 0; i < 3; i++){
        free(random_allocation);
        double_pointer[i] = (int*) malloc(4 * sizeof(int));
        random_allocation = malloc((i+1) * 30 * sizeof(int));
    }

    printf("&array[0][1] - &array[0][0] = %p\n", &(array[0][1]) - &(array[0][0]));
    printf("&array[1][0] - &array[0][0] = %p\n", &(array[1][0]) - &(array[0][0]));
    printf("&array[1][1] - &array[0][0] = %p\n", &(array[1][1]) - &(array[0][0]));
    printf("\n");

    printf("&pointer[1] - &pointer[0] = %p\n", pointer+1 - pointer+0);
    printf("&pointer[4] - &pointer[0] = %p\n", pointer+4 - pointer+0);
    printf("&pointer[5] - &pointer[0] = %p\n", pointer+5 - pointer+0);
    printf("\n");

    printf("&double_pointer[0][1] - &double_pointer[0][0] = %p\n", &(double_pointer[0][1]) - &(double_pointer[0][0]));
    printf("&double_pointer[1][0] - &double_pointer[0][0] = %p\n", &(double_pointer[1][0]) - &(double_pointer[0][0]));
    printf("&double_pointer[1][1] - &double_pointer[0][0] = %p\n", &(double_pointer[1][1]) - &(double_pointer[0][0]));
    printf("\n");

    return 0;
}