#include <iostream>
#include <string>

using namespace std;

struct Point {
    double x,y;
};


int main() {
    int *p;

	p = NULL; // initialize with 0
	int x = 2;

	p = new int;//p now points to some garbage integer

	*p = x + 1;//change the value p points to to be  x+1 (3)

	p[0] = 5;
	//de-referencing a pointer
	*p = 4; // same as p[0] = 4;

    cout << p << endl;
	cout << p[0] << endl;

	string *ps;
	string myString = "ic210";
	ps = new string;

	*ps = "tigers";
	*ps = myString;

	p = &x; //&x gets the address of x; p now points to x

	*p = 5; //this will change x, since p points to x

	cout << p << endl;
	cout << &x << endl;
	cout << p[0] << endl;
	cout << x << endl;

	//pointers to structs 

	Point myPoint;
	Point* pPointer;

	pPointer = new Point;
	(*pPointer).x = 5;
	(*pPointer).y = 10;

	pPointer->x = 5; //easier notation; widely used
	pPointer->y = 10;

    return 0;
}