example_8

src/example_8/.gitignore

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+.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

src/example_8/dub.json

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+{
+  "authors": [
+    "Alexander"
+  ],
+  "description": "Интерфейсы и классы",
+  "license": "proprietary",
+  "name": "example_8",
+  "targetPath": "bin"
+}

src/example_8/source/app.d

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+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());
+	}
+}

src/example_8/source/min_.d

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+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;
+    }
+}

src/example_8/source/stat_.d

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+module stat_;
+
+interface Stat
+{
+    void accumulate(double x);
+    void postprocess();
+    double result();
+}