.  "\ident	"@(#)cls4:man/complex/cplxops.3	1.1"
.TH CPLXOPS 3C++ "C++ Complex Math Library" " "
.SH NAME
complex_operators:  operators for the C++ complex math library
.SH SYNOPSIS
.nf
.ta 1i 2.5i
.B #include <complex.h>
\f3
 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);
.br
 };
.fi
\fP
.SH 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 \f(CWcomplex\fP operators,
 \(em \f3x\fP, \f3y\fP, and \f3z\fP are of type \f(CWcomplex\fP.
.P
Arithmetic operators:
.TP 15
\f3z = x + y\fP
Returns a \f(CWcomplex\fP which is the
arithmetic sum of complex numbers \f2x\fP and \f2y\fP.
.P
.TP 15
\f3z = \-x\fP
Returns a \f(CWcomplex\fP which is the
arithmetic negation of complex number \f2x\fP.
.P
.TP 15
\f3z = x \- y\fP
Returns a \f(CWcomplex\fP which is the
arithmetic difference of complex numbers \f2x\fP and \f2y\fP.
.P
.TP 15
\f3z = x * y\fP
Returns a \f(CWcomplex\fP which is the
arithmetic product of complex numbers \f2x\fP and \f2y\fP.
.P
.TP 15
\f3z = x / y\fP
Returns a \f(CWcomplex\fP which is the
arithmetic quotient of complex numbers \f2x\fP and \f2y\fP.
.P
Comparison operators:
.P
.TP 15
\f3x == y\fP
Returns non-zero if complex number \f2x\fP is equal to complex number \f2y\fP;
returns 0 otherwise.
.P
.TP 15
\f3x != y\fP
Returns non-zero if complex number \f2x\fP is not equal to complex number \f2y\fP;
returns 0 otherwise.
.P
Assignment operators:
.P
.TP 15
\f3x += y\fP
Complex number \f2x\fP is assigned the value of the
arithmetic sum of itself and complex number \f2y\fP.
.P
.TP 15
\f3x \-= y\fP
Complex number \f2x\fP is assigned the value of the
arithmetic difference of itself and complex number \f2y\fP.
.P
.TP 15
\f3x *= y\fP
Complex number \f2x\fP is assigned the value of the
arithmetic product of itself and complex number \f2y\fP.
.P
.TP 15
\f3x /= y\fP
Complex number \f2x\fP is assigned the value of the
arithmetic quotient of itself and complex number \f2y\fP.
.SH WARNING
The assignment operators do not produce a value
that can be used in an expression.
That is,
the following construction is syntactically invalid,
.RS
.br
\f(CWcomplex    x, y, z;
.br
.
.br
x = ( y += z );\fP
.br
.RE
whereas,
.RS
.br
\f(CWx = ( y + z );

.br
x = ( y == z );\fP
.br
.RE
are valid.
.SH SEE ALSO
CPLX.INTRO(3C++),
cartpol(3C++),
cplxerr(3C++),
cplxexp(3C++),
and
cplxtrig(3C++).