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src/example_2/.gitignore

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+.dub
+docs.json
+__dummy.html
+docs/
+/example_2
+example_2.so
+example_2.dylib
+example_2.dll
+example_2.a
+example_2.lib
+example_2-test-*
+*.exe
+*.o
+*.obj
+*.lst

src/example_2/dub.json

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+{
+	"authors": [
+		"alexander"
+	],
+	"copyright": "Copyright © 2021, alexander",
+	"description": "Числа и выражения",
+	"license": "proprietary",
+	"name": "example_2",
+	"targetPath": "bin"
+}

src/example_2/source/app.d

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+import std.stdio;
+
+void main()
+{
+    immutable byte inchesPerFoot = 12;
+    immutable cmPerInch = 2.54;
+
+    foreach (feet; 5 .. 7)
+    {
+        foreach (inches; 0 .. inchesPerFoot)
+        {
+            writefln("%d'%d''\t%f'", feet, inches, (feet * inchesPerFoot + inches) * cmPerInch);
+        }
+    }
+}