Complex arithmetic in C++

Mixed mode arithmetic

Mixed mode expressions are handled correctly. Real values will be converted to complex where necessary. For example:

   complex xx(3.5,4.0);
   complex yy = log(yy) + log(3.2);

This expression involves a mixture of real values: log(3.2), and complex values: log(yy) and the sum. Another example of mixing real and complex, xx=1, is equivalent to xx=complex(1) which in turn is equivalent to xx=complex(1,0). The interpretation of the expression (xx+1)yy3.2 is (((xx+complex(1))yy)complex(3.2)).