Calc

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WindowsFormsApp1
{
    public static class Calc
    {
        private static double memory;

        public static void MemPlus (double a)
        {
            memory += a;
        }

        public static void MemMinus (double a)
        {
            memory -= a;
        }

        public static void MemCLR()
        {
            memory = 0;
        }

        public static double MemR()
        {
            return memory;
        }

        public static double Suma (double a, double b)
        {
            return a + b;
        }

        public static double Roznica ( double a, double b)
        {
            return a - b;
        }

        public static double Iloczyn ( double a, double b)
        {
            return a * b;
        }
        public static double Iloraz ( double a, double b)
        {
            if (b == 0)
                throw new Exception();
            else
                return a / b;
        }
        public static double Negacja ( double a)
        {
            return -1 * a;
        }
        public static double Kwadrat (double a)
        {
            return a * a;
        }
        public static double Odwr (double a)
        {
            return 1 / a;
        }
        public static double Sqrt (double a)
        {
            if (a < 0)
                throw new Exception();
            else
            {
                return Math.Sqrt(a);
            }
        }

        public static double Procent (double a)
        {
            return a / 100;
        }
    }
}