HP 3000 Manuals

Compiler Library/XL Reference Manual

CEXP (or CEXP') 

CEXP calculates ex , where x is a complex number.

Declaration 

Complex numbers in HP FORTRAN 77/XL programs are represented as an
ordered pair of real numbers:  one for the real part a and one for the
imaginary part b.  Thus, complex numbers occupy eight bytes.

     TYPE complex=RECORD
                   realpart:REAL;
                   imagpart:REAL;
                  END;

     FUNCTION CEXP(VAR x:complex):complex; EXTERNAL;

Accuracy 

Depends on the accuracy of SIN, COS, and EXP.

Attributes 

Parameter:                Any complex number representable in two
                          representable real numbers:  one for the real
                          part a and one for the imaginary part b; a must
                          be in the range [-87.3366, 88.7228].  See
                          Chapter 1 for details on the internal
                          representation of real numbers.

Result:                   A complex number.

HP FORTRAN 77/XL:         Intrinsic function:  Y=CEXP(X).

Error:                    See the SIN, COS, and EXP error descriptions.

MPE/iX 5.0 Documentation