10 void housev(
double *a,
double *d,
double *dp,
int n)
16 double *qw, *qs, *pc, *p;
18 qs = (
double *)calloc(n,
sizeof(
double));
19 for (j = 0, pc = a; j < n - 2; ++j, pc += n + 1) {
21 for (i = 1, sc = 0.; i <= m; ++i)
25 if ((x = *(pc + 1)) < 0.) {
27 h = 1. / sqrt(-2. * sc * y);
31 h = 1. / sqrt(2. * sc * y);
34 for (i = 0, qw = pc + 1; i < m; ++i) {
41 for (i = 0, e = j + 2, p = pc + n + 1, h = 0.; i < m;
43 qs[i] += (y = qw[i]) * *p++;
44 for (k = i + 1; k < m; ++k) {
50 for (i = 0; i < m; ++i) {
54 for (i = 0, e = j + 2, p = pc + n + 1; i < m; ++i, p += e++) {
55 for (k = i; k < m; ++k)
56 *p++ -= qw[i] * qs[k] + qs[i] * qw[k];
64 d[j + 1] = *(pc += n + 1);
66 for (i = 0, m = n + n, p = pc; i < m; ++i)
71 for (m = 2; m < n; ++m, qw -= n + 1) {
72 for (j = 0, p = pc, *pc = 1.; j < m; ++j, p += n) {
73 for (i = 0, qs = p, h = 0.; i < m;)
75 for (i = 0, qs = p, h += h; i < m;)
78 for (i = 0, p = qw + m; i < n; ++i)
void housev(double *a, double *d, double *dp, int n)