typedef double complex[2]

[seia0106]

Hello,
I have an array
X=[0,0,1,0,0,0,-1,0,0,0,1,0,0,0 ,-1,0], whose even and odd indices
should represent
real and imaginary parts of complex numbers.
This I want to use in a routine that uses the
typedef double Cx[2]; for storing complex numbers.

I want to declare an array of complex numbers(with 8 elements) of this
type(Cx), such that even and odd indices of array X are loaded as real
and imaginary parts of complex numbers of this array. Would someone
please tell me how this can be done?

Thanks.

[Kevin Bracey]

In message <4f************ **************@ posting.google. com>
mi*******@yahoo .com (seia0106) wrote:

Hello,
I have an array
X=[0,0,1,0,0,0,-1,0,0,0,1,0,0,0 ,-1,0], whose even and odd indices
should represent
real and imaginary parts of complex numbers.
This I want to use in a routine that uses the
typedef double Cx[2]; for storing complex numbers.

I want to declare an array of complex numbers(with 8 elements) of this
type(Cx), such that even and odd indices of array X are loaded as real
and imaginary parts of complex numbers of this array. Would someone
please tell me how this can be done?

Given the typedef, an array of complex numbers can be defined and initialised
as:

Cx myarray[8] = { {0,0}, {1,0}, {0,0}, {-1,0},
{0,0}, {1,0}, {0,0}, {-1,0} };

The inner braces can be optionally omitted, but it's probably best to
keep them for clarity.

Does that answer your question?

--
Kevin Bracey, Principal Software Engineer
Tematic Ltd Tel: [phone]
182-190 Newmarket Road Fax: [phone]
Cambridge, CB5 8HE, United Kingdom WWW: http://www.tematic.com/