#include <iostream>
#include <cstdlib>
using namespace std;

int main()
{
	int i {10};

	++i;     //Allowed to do all these things, because i is not const.
	--i;
	i = 11;
	i += 12;
	cout << "Please input an integer and press RETURN. ";
	cin >> i;

	const int j {20};

	//++j;    //Not allowed to do any of these things, because i is const.
	//--j;
	//j = 21;
	//j += 12;
	cout << "Please input an integer and press RETURN. ";
	//cin >> j;

	return EXIT_SUCCESS;
}