Averages/Simple moving average: Difference between revisions

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     (setf pointer (rest pointer))     ; advance pointer
     (/ sum (min count period))))</lang>
+=={{header|D}}==
+This should work properly for any types that act like numerics.
+<lang d>
+import std.stdio;
+import std.string;
+class MovingAvg(T) {
+        T accum = 0;
+        int numelements;
+        MovingAvg!(T) add(T input) {
+                accum += input;
+                numelements++;
+                return this;
+        }
+        T getAvg() {
+                if (!numelements) return 0;
+                return accum/numelements;
+        }
+}
+int main() {
+        double[]nums = [1, 2, 3, 4, 5, 5, 4, 3, 2, 1];
+        auto mavg = new MovingAvg!(double);
+        foreach(index,num;nums) {
+                writefln("Average number %d is %s",index,toString(mavg.add(num).getAvg));
+        }
+        return 0;
+}
+</lang>
 =={{header|E}}==