// The square root function for numbers
CNumber &Sqrt(CNumber &num) {
CNumber *pnumSqrt;
if(! num.Defined()) {throw ELENotDefined; }
pnumSqrt = new CNumber(sqrt(double(num))); // Make a deep copy of the original
pnumSqrt->SetAllocated(true); // We allocated the memory space
if(num.Allocated()) {delete # } // This should call for the destructor
return *pnumSqrt;
} // Sqrt
