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using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Calculation



{

class CalculateNumber



{

int Number1, Number2;

char option;

int result;

public void Number ()



{

Console.WriteLine ("Enter the first number");

Number1 = Convert.ToInt32 (Console.ReadLine());

Console.WriteLine ("Enter the second number");

Number2 = Convert.ToInt32 (Console.ReadLine ());

Console.WriteLine ( "Main Menu");

Console.WriteLine ( "1.Addition");

Console.WriteLine ( "2.Subtraction");

Console.WriteLine ( "3.Multiplication");

Console.WriteLine ( "4.Division");

Console.WriteLine ( "Enter the operation you want to perform");

option = Convert.ToChar (Console.ReadLine());



　

switch (option)



{

case '1':



result = Number1 + Number2;

Console.WriteLine ( "The Result of addition is:{0}", result);

break;

case '2':



result = Number1 - Number2;

Console.WriteLine ("the result of subtraction is: {0}", result);

break;

case '3':



result = Number1 * Number2;

Console.WriteLine ( "the result of multiplication is: {0}", result);

break;

case '4':



result = Number1 / Number2;

Console.WriteLine ("the result of division is: {0}", result);

break ;



}

Console.ReadLine ();



}

}

class ClassMain



{

static void Main(string[] args)



{

CalculateNumber obj = new CalculateNumber ();



obj.Number ();

}

}

}