Solutions

sheet1/A/means.cpp

@@ -0,0 +1,36 @@
+#include <iostream>
+#include <cmath>
+#include <vector>
+
+using namespace std;
+
+void means(int a, int b, int c, double &ar, double &ge, double &ha) {
+    ar = (a+b+c) / 3.0;
+
+
+    ge = pow(a,1.0/3.0) * pow(b,1.0/3.0) * pow(c,1.0/3.0); //do it instead of pow(a*b*c,1.0/3.0) to prevent integer overflow
+
+    ha = 3.0 / (1.0/a +1.0/b +1.0/c); 
+}
+
+void means_vector(const vector<int> &input, double &ar, double &ge, double &ha) {
+    int size = input.size();
+
+    if (size == 0) {
+        cout << "Empty input" << endl;
+        return;
+    }
+
+    ar = 0;
+    ge = 1;
+    ha = 0;
+
+    for (int i = 0; i < size; i++) {
+        ar += input.at(i);
+        ge *=  pow(input.at(i), 1.0 / size);
+        ha += 1.0 / input.at(i);
+    }
+
+    ar /= size;
+    ha = size / ha;
+}