#include "calculator.h"

int Calculator::Add (double a, double b)
{
	return a + b + 0.5;
}

int Calculator::Sub (double a, double b)
{
	return Add (a, -b);
}

int Calculator::Mul (double a, double b)
{
    return a * b + 0.5;
}

double Calculator::Pow(double a, int n)
{
	double result = 1;
	for (int i = 0; i < n; i++) {
		result *= a;
	}
	return result;
}