#include <iostream>
#include <math.h>
int main()
{
	double x, z, y;
	char t;
	std::cout << "Your first number";
	std::cin >> x;
	std::cout << "Your second number";
	std::cin >> y;
	std::cout << "Operation with number";
	std::cout << "1.+\n2.-\n3.*\n4.**\n5./\n6.sqrt\n7.log\n";
	std::cin >> t;
	if (t == '1')
		z = x + y;
	if (t == '2')
		z = x - y;
	if (t == '3')
		z = x * y;
	if (t == '5')
		z = x / y;
	if (t == '4')
		z = pow(x, y);
	if (t == '6')
		z = sqrt(x);
	if (t == '7')
		z = log(y) / log(x);
	std::cout << "Result is" << z;
	return 0;
}