HPUX cplxexp[3]

 CPLXEXP(3C++)                                                 CPLXEXP(3C++)

                          C++ Complex Math Library



 NAME
      exp, log, pow, sqrt - exponential, logarithm, power, square root
      functions for the C++ complex library

 SYNOPSIS
      #include <complex.h>

      class complex {

      public:
                friend complex exp(complex);
                friend complex log(complex);
                friend complex pow(double, complex);
                friend complex pow(complex, int);
                friend complex pow(complex, double);
                friend complex pow(complex, complex);
                friend complex sqrt(complex);
      };

 DESCRIPTION
      The following math functions are overloaded by the complex library,
      where:
       - x, y, and z are of type complex.

                              x
      z = exp(x)     Returns e .

      z = log(x)     Returns the natural logarithm of x.

                              y
      z = pow(x, y)  Returns x .

      z = sqrt(x)    Returns the square root of x, contained in the first or
                     fourth quadrants of the complex plane.

 SEE ALSO
      CPLX.INTRO(3C++), cartpol(3C++), cplxerr(3C++), cplxops(3C++), and
      cplxtrig(3C++).

 DIAGNOSTICS
      exp returns (0, 0) when the real part of x is so small, or the
      imaginary part is so large, as to cause overflow.  When the real part
      is large enough to cause overflow, exp returns (HUGE, HUGE) if the
      cosine and sine of the imaginary part of x are positive, (HUGE, -HUGE)
      if the cosine is positive and the sine is not, (-HUGE, HUGE) if the
      sine is positive and the cosine is not, and (-HUGE, -HUGE) if neither
      sine nor cosine is positive.  In all these cases, errno is set to
      ERANGE.

      log returns (-HUGE, 0) and sets errno to EDOM when x is (0, 0).  A
      message indicating SING error is printed on the standard error output.





                                    - 1 -        Formatted:  August 11, 1996






 CPLXEXP(3C++)                                                 CPLXEXP(3C++)

                          C++ Complex Math Library



      These error-handling procedures may be changed with the function
      complex_error (cplxerr(3C++)).




















































                                    - 2 -        Formatted:  August 11, 1996