#include <iostream>
#include <iomanip>


void prefix_vs_postfix() {
	
	int k = 5;
	std::cout << k << "\n";
	k++;
	std::cout << k << "\n";
	++k;
	std::cout << k << "\n";
	double y = 1.5;
	y++;
	std::cout << y << "\n";

	// ++k - сначала k увеличится на 1, а затем присвоится в n 
	int n = ++k;
	std::cout << "k:" << k << " n:" << n << "\n";
	k = 7;
	// ++k - сначала k присвоится в m, а затем увеличится на 1 
	int m = k++;
	std::cout << "k:" << k << " m:" << m << "\n";

	k = 7;
	std::cout << "k++: " << k++ << "\n";
	std::cout << "k: " << k << "\n";

	k = 7;
	std::cout << "++k: " << ++k << "\n";
	std::cout << "k: " << k << "\n";

	int a = 5;

	std::cout << "a: " << a << "\n";
	std::cout << "a++ + (-a * ++a): " << a++ + (-a * ++a) << "\n";
	std::cout << "a: " << a << "\n";
	
	a = 5;
	std::cout << "a: " << a << "\n";
	std::cout << "++a + (-a * ++a): " << ++a + (-a * ++a) << "\n";
	std::cout << "a: " << a << "\n";
}

int counter = 0;

long long factorial0(int n) {

	std::cout << "Start factorial " << counter << "\n";
	long long result = n;
	while (n > 2) {
		n--;
		result *= n;
	}
	counter++;
	return result;
}


long long factorial1(int n) {

	std::cout << "Start factorial " << counter << "\n";
	long long result = n;
	while (n > 2)		
		result *= --n;		
	
	counter++;
	return result;
}


void multy_tab() {

	int k = 0, n = 0;
	while (n <= 9) {
		k = 0;
		while (k <= 9) {
			std::cout << std::setw(2) << n * k++ << " ";
		}
		std::cout << "\n";
		n++;
	}

}


int main() {
	//prefix_vs_postfix();
	//std::cout << !5 << std::endl;	
	/*std::cout << "2! = " << factorial0(2) << std::endl;
	std::cout << "5! = " << factorial1(5) << std::endl;
	std::cout << "4! = " << factorial0(4) << std::endl;
	std::cout << "3! = " << factorial0(3) << std::endl;
	std::cout << "6! = " << factorial1(6) << std::endl;
	*/
	multy_tab();


	 

	return 0;
}