finished hw7

Hw7&8/weight.hpp

@@ -0,0 +1,69 @@
+//
+// Created by Brady Bodily on 11/17/19.
+//
+#ifndef HW7_8_WEIGHT_HPP
+#define HW7_8_WEIGHT_HPP
+#include <ratio>
+namespace usu
+{
+    template <typename T, typename T2 = std::uint64_t>
+    class weight
+    {
+      private:
+        T2 valCount;
+
+      public:
+        using ratio = T;
+        weight() :
+            valCount(0){};
+        weight(T2 count) :
+            valCount(count){};
+        T2 count() { return valCount; };
+    };
+
+    template <typename T, typename T2>
+    T weight_cast(T2 input)
+    {
+        return T(static_cast<double>((T::ratio::den * T2::ratio::num) * input.count()) / (T::ratio::num * T2::ratio::den));
+    }
+
+    template <typename T>
+    T operator*(double scalar, T weight)
+    {
+        auto count = weight.count();
+        auto newCount = static_cast<decltype(count)>(scalar * count);
+        T newweight(newCount);
+        return newweight;
+    }
+
+    template <typename T>
+    T operator*(T weight, double scalar)
+    {
+        return scalar * weight;
+    }
+
+    template <typename T, typename T2>
+    T operator+(T l, T2 r)
+    {
+        T returnWeight(l.count() + r.count());
+        return returnWeight;
+    }
+
+    template <typename T, typename T2>
+    T operator-(T l, T2 r)
+    {
+        T returnWeight(l.count() - r.count());
+        return returnWeight;
+    }
+
+    //america
+    using ounce = weight<std::ratio<35'273'961, 1'000'000'000>>;
+    using pound = weight<std::ratio<2'204'622, 1'000'000'000>>;
+    using ton = weight<std::ratio<1'102'311, 1'000'000'000'000>>;
+    //metrics
+    using microgram = weight<std::ratio<1, 1'000'000>>;
+    using gram = weight<std::ratio<1, 1>>;
+    using kilogram = weight<std::ratio<1'000, 1>>;
+
+}
+#endif // HW7_8_WEIGHT_HPP