xo-unit: example: + ex4 .. ex6

example/ex5/ex5.cpp

@@ -0,0 +1,23 @@
+/** @file ex5.cpp **/
+
+#include "xo/unit/quantity.hpp"
+#include <iostream>
+
+int
+main () {
+    namespace u = xo::unit::units;
+    namespace qty = xo::unit::qty;
+    using namespace std;
+
+    /* 20% volatility over 250 days (approx number of trading days in one year) */
+    auto q1 = qty::volatility250d(0.2);
+    /* 10% volatility over 30 days */
+    auto q2 = qty::volatility30d(0.1);
+
+    auto sum = q1 + q2;
+    auto prod = q1 * q2;
+
+    cerr << "q1: " << q1 << ", q2: " << q2 << ", q1+q2: " << sum << ", q1*q2: " << prod << endl;
+}
+
+/** end ex5.cpp */