CalcEngine: Remove the need to specify base/radix when working with Rational values (#31)

- Separates values from the representation (base/radix) of those values.
- Uses a single base for all values represented as Rationals.
- Rationals are converted to/from a specific base when they are converted to/from strings.

src/CalcManager/CEngine/calc.cpp

@@ -95,7 +95,7 @@ CCalcEngine::CCalcEngine(bool fPrecedence, bool fIntegerMode, CalculationManager
 
     m_dwWordBitWidth = DwWordBitWidthFromeNumWidth(m_numwidth);
 
-    m_maxTrigonometricNum = RationalMath::Pow(10, 100, m_radix, m_precision);
+    m_maxTrigonometricNum = RationalMath::Pow(10, 100, m_precision);
 
     SetRadixTypeAndNumWidth(DEC_RADIX, m_numwidth);
     SettingsChanged();
@@ -118,7 +118,7 @@ void CCalcEngine::InitChopNumbers()
     for (size_t i = 0; i < m_chopNumbers.size(); i++)
     {
         auto maxVal = m_chopNumbers[i].Div(2, m_precision);
-        maxVal = RationalMath::Integer(maxVal, m_radix, m_precision);
+        maxVal = RationalMath::Integer(maxVal, m_precision);
 
         m_maxDecimalValueStrings[i] = maxVal.ToString(10, FMT_FLOAT, m_precision);
     }