Calculator project completion

Calculator.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CodeReviews.Console.Calculator", "CodeReviews.Console.Calculator\CodeReviews.Console.Calculator.csproj", "{526DCBA8-896A-4097-A3B9-B21A57F0D9ED}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CalculatorLibrary", "CalculatorLibrary\CalculatorLibrary.csproj", "{F5A74BD6-8F67-44DB-A6FD-2D5046EAE9C6}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{526DCBA8-896A-4097-A3B9-B21A57F0D9ED}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{526DCBA8-896A-4097-A3B9-B21A57F0D9ED}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{526DCBA8-896A-4097-A3B9-B21A57F0D9ED}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{526DCBA8-896A-4097-A3B9-B21A57F0D9ED}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F5A74BD6-8F67-44DB-A6FD-2D5046EAE9C6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F5A74BD6-8F67-44DB-A6FD-2D5046EAE9C6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F5A74BD6-8F67-44DB-A6FD-2D5046EAE9C6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F5A74BD6-8F67-44DB-A6FD-2D5046EAE9C6}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

CalculatorLibrary/CalculatorLibrary.cs

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+namespace CalculatorLibrary;
+
+using System.Diagnostics;
+using Newtonsoft.Json;
+
+public class Calculator
+{
+    JsonWriter writer;
+    public Calculator()
+    {
+        StreamWriter logFile = File.CreateText("calculatorlog.json");
+        logFile.AutoFlush = true;
+        writer = new JsonTextWriter(logFile);
+        writer.Formatting = Formatting.Indented;
+        writer.WriteStartObject();
+        writer.WritePropertyName("operations");
+        writer.WriteStartArray();
+    }
+    public double DoOperation(double num1, double num2, string op)
+    {
+        double result = double.NaN; // Default value is "not-a-number" if an operation, such as division, could result in an error.
+        writer.WriteStartObject();
+        writer.WritePropertyName("operand1");
+        writer.WriteValue(num1);
+        writer.WritePropertyName("opearand2");
+        writer.WriteValue(num2);
+        writer.WritePropertyName("opearation");
+
+        // Use a switch statement to do the math.
+        switch (op)
+        {
+            case "a":
+                result = num1 + num2;
+                writer.WriteValue("Add");
+                break;
+            case "s":
+                result = num1 - num2;
+                writer.WriteValue("Substract");
+                break;
+            case "m":
+                result = num1 * num2;
+                writer.WriteValue("Multiply");
+                break;
+            case "d":
+                // Ask the user to enter a non-zero divisor.
+                if (num2 != 0)
+                {
+                    result = num1 / num2;
+                    writer.WriteValue("Division");
+                }
+                break;
+            // Return text for an incorrect option entry.
+            default:
+                break;
+        }
+        writer.WritePropertyName("Result");
+        writer.WriteValue(result);
+        writer.WriteEndObject();
+
+        Finish();
+        return result;
+    }
+
+    public void Finish()
+    {
+        writer.WriteEndArray();
+        writer.WriteEndObject();
+        writer.Close();
+    }
+}
+
+

CalculatorLibrary/CalculatorLibrary.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
+  </ItemGroup>
+
+</Project>

CodeReviews.Console.Calculator/CodeReviews.Console.Calculator.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="../CalculatorLibrary/CalculatorLibrary.csproj" />
+  </ItemGroup>
+
+</Project>

CodeReviews.Console.Calculator/Program.cs

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+using System.Text.RegularExpressions;
+using CalculatorLibrary;
+class Program
+{
+    static void Main(string[] args)
+    {
+        bool endApp = false;
+        // Display title as the C# console calculator app.
+        Console.WriteLine("Console Calculator in C#\r");
+        Console.WriteLine("------------------------\n");
+
+        while (!endApp)
+        {
+            Calculator calculator = new Calculator();
+
+            // Declare variables and set to empty.
+            // Use Nullable types (with ?) to match type of System.Console.ReadLine
+            string? numInput1 = "";
+            string? numInput2 = "";
+            double result = 0;
+
+            // Ask the user to type the first number.
+            Console.Write("Type a number, and then press Enter: ");
+            numInput1 = Console.ReadLine();
+
+            double cleanNum1 = 0;
+            while (!double.TryParse(numInput1, out cleanNum1))
+            {
+                Console.Write("This is not valid input. Please enter a numeric value: ");
+                numInput1 = Console.ReadLine();
+            }
+
+            // Ask the user to type the second number.
+            Console.Write("Type another number, and then press Enter: ");
+            numInput2 = Console.ReadLine();
+
+            double cleanNum2 = 0;
+            while (!double.TryParse(numInput2, out cleanNum2))
+            {
+                Console.Write("This is not valid input. Please enter a numeric value: ");
+                numInput2 = Console.ReadLine();
+            }
+
+            // Ask the user to choose an operator.
+            Console.WriteLine("Choose an operator from the following list:");
+            Console.WriteLine("\ta - Add");
+            Console.WriteLine("\ts - Subtract");
+            Console.WriteLine("\tm - Multiply");
+            Console.WriteLine("\td - Divide");
+            Console.Write("Your option? ");
+
+            string? op = Console.ReadLine();
+
+            // Validate input is not null, and matches the pattern
+            if (op == null || ! Regex.IsMatch(op, "^(a|s|m|d)$"))
+            {
+               Console.WriteLine("Error: Unrecognized input.");
+            }
+            else
+            { 
+               try
+               {
+                  result = calculator.DoOperation(cleanNum1, cleanNum2, op);
+                  if (double.IsNaN(result))
+                  {
+                     Console.WriteLine("This operation will result in a mathematical error.\n");
+                  }
+                  else Console.WriteLine("Your result: {0:0.##}\n", result);
+                }
+                catch (Exception e)
+                {
+                   Console.WriteLine("Oh no! An exception occurred trying to do the math.\n - Details: " + e.Message);
+                }
+            }
+            Console.WriteLine("------------------------\n");
+
+            // Wait for the user to respond before closing.
+            Console.Write("Press 'n' and Enter to close the app, or press any other key and Enter to continue: ");
+            if (Console.ReadLine() == "n") endApp = true;
+
+            Console.WriteLine("\n"); // Friendly linespacing.
+        }
+        return;
+    }
+}

CodeReviews.Console.Calculator/calculatorlog.json

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+{
+  "operations": [
+    {
+      "operand1": 23.0,
+      "opearand2": 23.0,
+      "opearation": "Division",
+      "Result": 1.0
+    }
+  ]
+}