1. Program.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication1
{
class Program
{
public static void Main()
{
start:
//Main Menu
MainMenu();
int choose = int.Parse(Console.ReadLine());
Console.Clear();
switch (choose)
{
case 1 :
Addition.Perform1();
goto start;
default :
Console.Write("Sorry request can't be processed");
Console.ReadLine();
break;
}
}
static void MainMenu()
{
Console.WriteLine("========= Calculator Program ========= \n");
Console.WriteLine("Main Menu\n");
Console.Write("1. Addition \n");
Console.Write("Your choose : ");
}
}
}
2. Addition
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication1
{
class Addition
{
public static void Perform1()
{
Console.Write("Input number 1 = ");
int num1 = int.Parse(Console.ReadLine());
Console.Write("Input number 2 = ");
int num2 = int.Parse(Console.ReadLine());
int result = num1 + num2;
Console.Write("Result : ");
Console.WriteLine(result);
Console.WriteLine();
}
}
}
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