public static Unit operator -(Unit u1, Unit u2)
{
if (u1.IsComparable(u2))
{
var averagePrefix = PrefixHelpers.AveragePrefix(u1.Prefix, u2.Prefix);
var quantity = u1.Quantity * Math.Pow(10, u1.Power10Difference(averagePrefix)) - u2.Quantity * Math.Pow(10, u2.Power10Difference(averagePrefix));
var newUnit = new Unit(quantity, averagePrefix, u1.BaseUnit, u1.Power);
return(newUnit);
}
else
{
throw new GrandmothersAndFrogsException(u1, u2, "You can't mix them. You just can't");
}
}
public static Unit operator *(Unit u1, Unit u2)
{
if (u1.BaseUnit == u2.BaseUnit && u1.BaseUnit != 0)
{
var averagePrefix = PrefixHelpers.AveragePrefix(u1.Prefix, u2.Prefix);
var power10 = u1.Power10Difference(averagePrefix) + u2.Power10Difference(averagePrefix);
var quantity = u1.Quantity * u2.Quantity * Math.Pow(10, power10);
var newUnit = new Unit(quantity, averagePrefix, u1.BaseUnit, u1.Power + u2.Power);
return(newUnit);
}
else
{
return(Unit.Multiply(u1, u2));
}
}