#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);
}