A simple calculator program is written in C# programming language.
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Program Listing
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
try
{
Run();
}
catch (Exception ex)
{
Console.WriteLine("The following error occured\n" + ex);
}
Console.ReadKey();
}
private static void Run()
{
Console.WriteLine("\n");
Console.Write("\tCalculator in C#");
Console.WriteLine("\n");
int firstNum = ReadInt("\tEnter first number: ");
int secondNum = ReadInt("\tEnter second number: ");
Console.Write("\tEnter operator: ");
int op = Console.Read();
int result = CoCalculation(firstNum, secondNum, (char)op);
Console.WriteLine("\n");
Console.WriteLine("\tThe Result: " + result);
Console.WriteLine("\n");
Console.Write("\tEnd of Program");
Console.WriteLine("\n");
}
private static int CoCalculation(int firstNum, int secondNum, char op)
{
switch (op)
{
case '+':
return firstNum + secondNum;
case '-':
return firstNum - secondNum;
case '*':
return firstNum * secondNum;
case '/':
if (secondNum == 0)
throw new Exception("Cannot divide by 0");
return firstNum / secondNum;
default:
throw new Exception("Illegal operand");
}
}
private static int ReadInt(string prompt)
{
Console.Write(prompt);
string input = Console.ReadLine();
return int.Parse(input);
}
}
}
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