#include <iostream>

using namespace std;

void change(int* x) // essential we made a new pointer and pointed it to the same address as p
{
	*x = 20; // this dereferences our pointer so we can change the variable. remember this is pointing to the memory on the heap
}

int main()
{
	int* p = new int; // allocated new memory on the heap and gave it a pointer
	*p = 10; // the derefereenced pointer is assigned to value 10
	cout << p << " " << *p << "\n"; // this should print out the memory address and the value 10
	change(p);
	cout << p << " " << *p << "\n";
	delete p; // this will delete the memory address stored here
	system("pause"); // this is so we can read the console window
	return 0;
}