#include <iostream>

#include <cmath>

using namespace std;

 

double suma(double a, double b);

double atimtis(double a, double b);

double daugyba(double a, double b);

double dalyba(double a, double b);

double laipsnis(double a, double b);

void atsakymas(double a, char veiksmas, double b);

int main()

{

	char veiksmas;

	double a;

	double b;

	cout << "Iveskite kintamaji a" << endl;

	cin >> a;

	cout << "Iveskite norima veiksmas (+,-,/,*, ^)" << endl;

	cin >> veiksmas;

	cout << "Iveskite kintamaji b" << endl;

	cin >> b;

	atsakymas(a, veiksmas, b);

	return 0;

}

void atsakymas(double a, char veiksmas, double b)

{

	if (veiksmas == '+'){

		cout << a << " + " << b << " = " << suma(a, b) << endl;

	}

	else

		if (veiksmas == '-'){

			cout << a << " - " << b << " = " << atimtis(a, b) << endl;

		}

		else

			if (veiksmas == '*'){

				cout << a << " * " << b << " = " << daugyba(a, b) << endl;

			}

			else 

				if (veiksmas == '/' && b != 0){

					cout << a << " / " << b << " = " << dalyba(a, b) << endl;

				}

				else

					if (veiksmas == '^'){

						cout << a << " ^ " << b << " = " << laipsnis(a, b) << endl;

					}

					else

					cout << "Tokio veiksmo atlikti negalime" << endl;

}

double suma(double a, double b)

{

	return a + b;

}

double atimtis(double a, double b)

{

	return a - b;

}

double daugyba(double a, double b)

{

	return a * b;

}

double dalyba(double a, double b)

{

	return a / b;

}

double laipsnis(double a, double b)

{

	return pow(a, b);

}