//To compile: g++ [source_code.cpp] -o [exec_file]
// replace [soure_code.cpp] with the filename, 
// replace [exec_file] with the executable file name
// i.e., g++ c++_basics.cpp -o run
//Note: if the output redirect is not given, i.e., the "-o [exec_file]" part is missing
//      then the default executable name is a.out

//To run the program, simply run the executable: ./[exec_file]
// i.e., ./a.out  (if your executable file is a.out)

#include <iostream> //input/output stream library

using namespace std; 


void foo(int* p){

	*p = 500;
	return;
}

//main function: entry point of the program
int main()
{	

	int val = 50;
	int* ptr = &val;
	int** ptr2 = &ptr;


	cout << "val:" << val << endl;
	cout << "*ptr: " << *ptr << endl;
	cout << "**ptr2: "<< **ptr2 << endl;

	cout << "&val: " <<&val << endl;
	cout << "ptr: " << ptr << endl;
	cout << "*ptr2: "<< *ptr2 << endl;

	cout << "&ptr: " << &ptr << endl;
	cout << "ptr2: "<< ptr2 << endl;

	cout << "&ptr2: "<< &ptr2 << endl;
	

	// *ptr = 100; 

	// cout << "val:" << val << endl;

	// foo(&val);
	// cout << "val:" << val << endl;




	return 0;
}