#include<iostream>

using namespace std;

void fun(int& r)
{
	r = 99;
}

void main(int argc, char* argv[])
{
	//pointer is a variable that holds an address
	int y = 9;
	// * - in C++

	int x = 8 * 7;	//* multiply
	//NULL means an address that should not be used
	int* p = NULL;			//p is a pointer to integer
	&x; //finding the address of x
	p = &x;
	if(p != NULL)
	{
		*p = 77; //* - what's at...   dereference operator
		cout << "*p : " << *p << endl;
		cout << "p: " << p << endl;
	}
	//& - in C++
	if(x > 10 && y == 9)
	{
		cout << "example of binary &&" << endl;
	}
	int z = x & y;  //& - bitwise and
	cout << z << endl;
	
	fun(z);
	int& w = z;  //& - reference variable
	w = 7;
	cout << z << endl;


	char name[] = "Dana";
	cout << name << endl;
	//char* stuff;
	//cout << stuff << endl;

	int a[] = {1,2,3,4,5,6,7,8,9};
	cout << a << endl;
	cout << *a << a[0] << endl;
	cout << *(a+1) << a[1] << endl; //pointer arithmetic

	//walking a pointer
	for(int* pa = a; pa < a + 9; pa++)
	{
		cout << *pa << endl;
	}
	
}