#include <iostream>
#include <cstdlib>
#include <string>   //for class string

using namespace std;

int countDays(const char& x);

int main()
{
	const char sun {1 << 0};   //00000001
	const char mon {1 << 1};   //00000010
	const char tue {1 << 2};   //00000100
	const char wed {1 << 3};   //00001000
	const char thu {1 << 4};   //00010000
	const char fri {1 << 5};   //00100000
	const char sat {1 << 6};   //01000000

	struct restaurant {
		string name;
		char days;   //which days of the week the restaurant is open
	};

	const restaurant a[] {
		{"Katz's Delicatessen", sun | mon | tue},            //00000111 0x07
		{"Tavern on the Green", sat | sun},                  //01000001 0x41
		{"Wo Hop", sun | mon | tue | wed | thu | fri | sat}, //01111111 0x7F
		{"Luchow's",            mon | tue | wed},            //00001110 0x0E
		{"Delmonico's",         thu | fri | sun}             //00110001 0x31
	};

	const size_t n {size(a)};   //how many restaurants
	
	for (int i {0}; i < n; ++i) {
		int daysOpen {countDays(a[i].days)};
		cout << "The restaurant " << a[i].name << " is open for "<< daysOpen << " days of the week.\n";
	}	
	return EXIT_SUCCESS;
}

int countDays(const char& x)
{
	int count {0};
	char mask {x};

	for (int i {0}; i < 7; ++i) {
		if (mask & 1) {
			++count;
		}
		mask >>= 1;
	}
	return count;
}