cplxops(3C++)

NAME
     complex_operators -  operators for the C++ complex math library

SYNOPSIS
     #include <complex.h>

     class complex {

     public:
               friend complex operator+(complex, complex);
               friend complex operator-(complex);
               friend complex operator-(complex, complex);
               friend complex operator*(complex, complex);
               friend complex operator/(complex, complex);

               friend int     operator==(complex, complex);
               friend int     operator!=(complex, complex);

               void           operator+=(complex);
               void           operator-=(complex);
               void           operator*=(complex);
               void           operator/=(complex);
      };

DESCRIPTION
     The basic arithmetic operators, comparison operators, and assignment
     operators are overloaded for complex numbers.  The operators have their
     conventional precedences.  In the following descriptions for complex
     operators,
      - x, y, and z are of type complex.

     Arithmetic operators:

     z = x + y      Returns a complex which is the arithmetic sum of complex
                    numbers x and y.

     z = -x         Returns a complex which is the arithmetic negation of
                    complex number x.

     z = x - y      Returns a complex which is the arithmetic difference of
                    complex numbers x and y.

     z = x * y      Returns a complex which is the arithmetic product of
                    complex numbers x and y.

     z = x / y      Returns a complex which is the arithmetic quotient of
                    complex numbers x and y.

     Comparison operators:
     x == y         Returns non-zero if complex number x is equal to complex
                    number y; returns 0 otherwise.

     x != y         Returns non-zero if complex number x is not equal to
                    complex number y; returns 0 otherwise.

     Assignment operators:

     x += y         Complex number x is assigned the value of the arithmetic
                    sum of itself and complex number y.

     x -= y         Complex number x is assigned the value of the arithmetic
                    difference of itself and complex number y.

     x *= y         Complex number x is assigned the value of the arithmetic
                    product of itself and complex number y.

     x /= y         Complex number x is assigned the value of the arithmetic
                    quotient of itself and complex number y.

WARNING
     The assignment operators do not produce a value that can be used in an
     expression.  That is, the following construction is syntactically
     invalid,

          complex    x, y, z;
          x = ( y += z );
     whereas,

          x = ( y + z );

          x = ( y == z );
     are valid.

SEE ALSO
     complex(3C++), cartpol(3C++), cplxerr(3C++), cplxexp(3C++), and
     cplxtrig(3C++).