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Calculator.cs
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Calculator.cs
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using System;
namespace Calculator
{
class Program
{
static void Main(string[] args)
{
// Declare variables and then initialize to zero.
int num1 = 0; int num2 = 0;
// Display title as the C# console calculator app.
Console.WriteLine("Console Calculator in C#\r");
Console.WriteLine("------------------------\n");
// Ask the user to type the first number.
Console.WriteLine("Type a number, and then press Enter");
num1 = Convert.ToInt32(Console.ReadLine());
// Ask the user to type the second number.
Console.WriteLine("Type another number, and then press Enter");
num2 = Convert.ToInt32(Console.ReadLine());
// Ask the user to choose an option.
Console.WriteLine("Choose an option from the following list:");
Console.WriteLine("\ta - Add");
Console.WriteLine("\ts - Subtract");
Console.WriteLine("\tm - Multiply");
Console.WriteLine("\td - Divide");
Console.Write("Your option? ");
// Use a switch statement to do the math.
switch (Console.ReadLine())
{
case "a":
Console.WriteLine($"Your result: {num1} + {num2} = " + (num1 + num2));
break;
case "s":
Console.WriteLine($"Your result: {num1} - {num2} = " + (num1 - num2));
break;
case "m":
Console.WriteLine($"Your result: {num1} * {num2} = " + (num1 * num2));
break;
case "d":
Console.WriteLine($"Your result: {num1} / {num2} = " + (num1 / num2));
break;
}
// Wait for the user to respond before closing.
Console.Write("Press any key to close the Calculator console app...");
Console.ReadKey();
}
}
}