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ex1A_mean_values/means.cpp

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+#include "../ex1A_mean_values/means.h"
+#include <cmath>
+#include <vector>
+
+void calculate_means(int a, int b, int c, double &am, double &gm, double &hm)
+{
+    am = (a + b + c)/3.0;
+    gm = exp((log(a)+log(b)+log(c))/3);
+    hm = 3.0/(1.0/a + 1.0/b + 1.0/c);
+}
+
+void calculate_means(std::vector<int> numbers, double &am, double &gm, double &hm)
+{
+    int n = numbers.size();
+
+    am = 0.;
+    gm = 0.;
+    hm = 0.;
+
+    for (int i = 0; i < n; ++i)
+    {
+        am += numbers[i];
+        gm += log(numbers[i]);
+        hm += 1.0/numbers[i];
+    }
+
+    am /= n;
+    gm = exp(gm/n);
+    hm = n/hm;
+}