change app icon and README

.gitignore

@@ -350,3 +350,4 @@ MigrationBackup/
 .ionide/
 
 releases/
+materials/

Calctus.csproj

@@ -32,6 +32,9 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
+  <PropertyGroup>
+    <ApplicationIcon>icon.ico</ApplicationIcon>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Core" />
@@ -112,6 +115,8 @@
   <ItemGroup>
     <None Include="App.config" />
   </ItemGroup>
-  <ItemGroup />
+  <ItemGroup>
+    <Content Include="icon.ico" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>

Calctus/UI/MainForm.cs

@@ -25,6 +25,12 @@ public MainForm() {
 
             InitializeComponent();
 
+            try {
+                exprBox.Font = new Font("Consolas", exprBox.Font.Size);
+                logBox.Font = new Font("Consolas", logBox.Font.Size);
+            } 
+            catch { }
+
             this.Text = Application.ProductName + " (v" + System.Reflection.Assembly.GetExecutingAssembly().GetName().Version + ")"; 
             exprBox.AutoSize = false;
             exprBox.Dock = DockStyle.Fill;
@@ -43,8 +49,17 @@ private void ExprBox_TextChanged(object sender, EventArgs e) {
                 var val = expr.Eval(_ctx);
                 var text = "= " + val.ToString();
                 if (val is RealVal rval) {
-                    if (rval.IsDimless)
-                        text += " (無次元)";
+                    if (rval.IsDimless) {
+                        var dval = rval.AsDouble;
+                        if (rval.IsInteger && 0xA <= dval && dval < UInt32.MaxValue) {
+                            var rvalInt = rval.FormatInt();
+                            var rvalHex = rval.FormatHex();
+                            text = "= " + rvalInt.ToString() +  " (" + rvalHex.ToString() + ")";
+                        }
+                        else {
+                            text += " (無次元)";
+                        }
+                    }
                     else
                         text += " (raw=" + rval.Raw + ")";
                 }

README.md

@@ -2,14 +2,21 @@
 
 a Calculator for Windows.
 
-![image](https://user-images.githubusercontent.com/40152459/166926981-453717a8-5c8c-4115-b679-03020c3b2e66.png)
+![Screen Shot](img/ss.png)
 
 ## Download
 
 → [releases](https://github.com/shapoco/calctus/releases).
 
 ## Features
 
+### Overview
+
+- Displays the evaluation value of a formula in text format.
+- Decimal, hexadecimal, and binary numbers can be mixed.
+- The formula history can be referenced with the up key.
+- Some built-in constants and built-in functions.
+
 ### Numeric Representations
 
 |Description|Example|