#include <stdio.h>
#include <stdlib.h>	// required for malloc

int main()
{
	double *a;
	int i, n;
	double b[7];

	printf("Enter the size of array: ");
	scanf("%d", &n);

	a = (double *)malloc(n * sizeof(double));	// sizeof(double) is required as it is in bytes

	printf("Size of a is %d\n", sizeof(a));	// size of the pointer
	printf("Size of b is %d\n", sizeof(b));	// size of array is the total space allotted in bytes
	printf("Number of elements in b is %d\n", sizeof(b) / sizeof(double));

	for (i = 0; i < n; i++)
		a[i] = i;	// array notation

	for (i = 0; i < n; i++)
		printf("%lf %lf\t", a[i], *(a + i));
	printf("\n");

	printf("&a is %u, while a[0] is at %u\n", &a, &a[0]);	// a is a separate variable stored elsewhere
	printf("&b is %u, while b[0] is at %u\n", &b, &b[0]);	// b is not stored separately

	free(a);	// important as otherwise space is not freed
}