The complex package provides ways to perform arithmetic operations,
  such as initialization, assignment, input, and output, on complex
  values (that is, numbers with a real part and an imaginary part).
  Additionally, this package supports operations that are unique to
  complex values, such as principal argument operations, conjugate
  operations, and conversions to and from polar coordinates.

  With the c_exception class and its c_exception function, the complex
  package also provides a mechanism for reporting and handling complex
  arithmetic errors.

  Header:

 	#include <complex.hxx>

  Additional Information (explode) :

• Global Declarations
• complex
• c_exception