add missing file

libmandel/src/Real.cpp

@@ -0,0 +1,31 @@
+#include "Real.h"
+#include <sstream>
+
+
+
+namespace mnd
+{
+    std::string toString(const Real& num)
+    {
+        return num.str();
+    }
+
+    std::string toLegibleString(const Real& num)
+    {
+        if (num == Real(0.0)) {
+            return "0";
+        }
+        int exponent = int(std::floor(static_cast<float>(mnd::log(num)) / ::logf(10.000001f)));
+        float fac = static_cast<float>(num / mnd::pow(Real(10), Real(exponent)));
+        std::stringstream ss;
+        ss.precision(3);
+        ss << std::fixed << fac << "e";
+        if (exponent < 0)
+            ss << "-" << -exponent;
+        else
+            ss << "+" << exponent;
+        return ss.str();
+    }
+}
+
+