diff --git a/src/example_8/.gitignore b/src/example_8/.gitignore
new file mode 100644
index 0000000..a10294f
--- /dev/null
+++ b/src/example_8/.gitignore
@@ -0,0 +1,15 @@
+.dub
+docs.json
+__dummy.html
+docs/
+/example_8
+example_8.so
+example_8.dylib
+example_8.dll
+example_8.a
+example_8.lib
+example_8-test-*
+*.exe
+*.o
+*.obj
+*.lst
diff --git a/src/example_8/dub.json b/src/example_8/dub.json
new file mode 100644
index 0000000..754845a
--- /dev/null
+++ b/src/example_8/dub.json
@@ -0,0 +1,9 @@
+{
+  "authors": [
+    "Alexander"
+  ],
+  "description": "Интерфейсы и классы",
+  "license": "proprietary",
+  "name": "example_8",
+  "targetPath": "bin"
+}
diff --git a/src/example_8/source/app.d b/src/example_8/source/app.d
new file mode 100644
index 0000000..f268a94
--- /dev/null
+++ b/src/example_8/source/app.d
@@ -0,0 +1,26 @@
+import std.stdio : writeln, stdin;
+import std.exception : enforce;
+import min_, stat_;
+
+void main(string[] args)
+{
+	Stat[] stats;
+	foreach (arg; args[1 .. $])
+	{
+		auto newStat = cast(Stat) Object.factory("min_." ~ arg);
+		enforce(newStat, "Invalid statistics function: " ~ arg);
+		stats ~= newStat;
+	}
+	for (double x; stdin.readf(" %s ", &x) == 1;)
+	{
+		foreach (s; stats)
+		{
+			s.accumulate(x);
+		}
+	}
+	foreach (s; stats)
+	{
+		s.postprocess();
+		writeln(s.result());
+	}
+}
diff --git a/src/example_8/source/min_.d b/src/example_8/source/min_.d
new file mode 100644
index 0000000..fdb1f9b
--- /dev/null
+++ b/src/example_8/source/min_.d
@@ -0,0 +1,23 @@
+module min_;
+
+import stat_;
+
+class Min : Stat
+{
+    private double min = double.max;
+    
+    void accumulate(double x)
+    {
+        if (x < min)
+        {
+            min = x;
+        }
+    }
+
+    void postprocess() {}
+    
+    double result()
+    {
+        return min;
+    }
+}
\ No newline at end of file
diff --git a/src/example_8/source/stat_.d b/src/example_8/source/stat_.d
new file mode 100644
index 0000000..9fc5668
--- /dev/null
+++ b/src/example_8/source/stat_.d
@@ -0,0 +1,8 @@
+module stat_;
+
+interface Stat
+{
+    void accumulate(double x);
+    void postprocess();
+    double result();
+}