function test_c99_complex;

$ #include <complex.h>
$
$ _Complex double zsum(_Complex double* zarray, int n) {
$     int i;
$     _Complex double sum = 0;
$     for (i = 0; i < n; ++i) sum += zarray[i];
$     return sum;
$ }

zarray = rand(10,1) + 1i*rand(10,1);
n = length(zarray);
# dcomplex result = zsum(dcomplex[] zarray, int n);
tassert(abs(result-sum(zarray)) < 1e-10*norm(zarray), 'C++ complex support');
# dcomplex cresult = conj(dcomplex result);
tassert(conj(result) == cresult, 'C++ complex support (2)');


function tassert(pred, msg)
if ~pred, fprintf('Failure: %s\n', msg); end