/* ptr.c - pointer and array example
 * by R. Teather, COSC 2P13 Spring 2009
 */

#include <stdio.h>

int main(void)
{
	int i = 0;

	//declare and initialize our array
	int ary[10] = {5, 6, 7, 8, 9, 10, 11, 12, 13, 14};

	//declare an int, and a pointer to that int 
	// note that &x refers to the address of x, iPtr stores this
	int x = 15;
	int* iPtr = &x;

	printf("Pointer example: \n\n");

	//if we print out the value of iPtr (as hex) and the address of x, they are the same
	printf("iPtr = %x, &x = %x\n", iPtr, &x);

	//use the * operator to dereference the pointer and get the value it points to (i.e., value of x)
	printf("*iPtr = %d, x = %d\n\n\n", *iPtr, x);
	


	printf("Array example: \n\n");

	//arrays are actually memory addresses too	
	printf("ary = %x, &ary = %x\n", ary, &ary);

	//we can print out the contents of the array using subscript notation (as usual)
	// or by pointer arithmetic, i.e., adding the offset to the array's base memory address
	// to get to a specific element of the array in memory
	for( i = 0; i < 10; i++)
	{
		printf("ary[i] = %d, *(ary+i) = %d\n", ary[i], *(ary+i));
		printf("&ary[i] = %x, (ary+i) = %x\n", &ary[i], (ary+i));
	}

	return 0;
}