CPLXOPS(3C++)

NAME

cplxops − arithmetic operator functions in the C++ complex number math library

SYNOPSIS

#include <complex.h>
class complex {
public:
friend complex operator- (const complex);
friend complex operator+ (const complex, const complex);
friend complex operator+ (double, const complex);
friend complex operator+ (const complex, double);
friend complex operator- (const complex, const complex);
friend complex operator- (double, const complex);
friend complex operator- (const complex, double);
friend complex operator∗ (const complex, const complex);
friend complex operator∗ (const complex, double);
friend complex operator∗ (double, const complex);
friend complex operator/ (const complex, const complex);
friend complex operator/ (const complex, double);
friend complex operator/ (double, const complex);
friend int operator== (const complex, const complex);
friend int operator!= (const complex, const complex);
void operator+= (const complex);
void operator+= (double);
void operator-= (const complex);
void operator-= (double);
void operator∗= (const complex);
void operator∗= (double);
void operator/= (const complex);
void operator/= (double);
... // remainder not shown here
};

DESCRIPTION

These functions are versions of the normal arithmetic operators overloaded for use with complex numbers.

Unary minus

complex z = − x
Returns the negative of complex x.

Binary arithmetic

complex z = x + y
Returns the sum of x and y, where one or both are complex. The library provides versions of this function optimized for combinations of floating-point and complex arguments.

complex z = x − y
Returns the difference of x and y, where one or both are complex. The library provides versions of this function optimized for combinations of floating-point and complex arguments.

complex z = x ∗ y
Returns the product of x and y, where one or both are complex. The library provides versions of this function optimized for combinations of floating-point and complex arguments.

complex z = x / y
Returns the quotient of x and y, where one or both are complex. The library provides versions of this function optimized for combinations of floating-point and complex arguments.

Comparison

Complex numbers are not well-ordered, so only equality can be tested.

x == y
Returns 1 if x and y (both complex) are equal, 0 otherwise.

x != y
Returns 0 if x and y (both complex) are equal, 1 otherwise.

Assignment

The compiler-generated default assignment operator, complex& operator=(const complex&), is appropriate for this type, so it is not redefined by the class. Note: The compound assignment operators do not return a value, and so cannot be used in larger expressions. For example, the expression

z = ( x += y );
is valid if x is an integer or floating-point type, but will not compile if x is complex.

x += y
Complex x is incremented by the value of y. The library provides versions of this function optimized for floating-point and complex right-hand arguments.

x −= y
Complex x is decremented by the value of y. The library provides versions of this function optimized for floating-point and complex right-hand arguments.

x ∗= y
Complex x is assigned the value of itself multiplied by the value of y. The library provides versions of this function optimized for floating-point and complex right-hand arguments.

x /= y
Complex x is assigned the value of itself divided by the value of y. The library provides versions of this function optimized for floating-point and complex right-hand arguments.

Museum

Related Articles