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// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
// SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
// SPDX-FileContributor: 2003-22 Bradley M. Bell
// ----------------------------------------------------------------------------
/*
{xrst_begin exp_2_for2.cpp}
exp_2: Verify Second Order Forward Sweep
########################################
{xrst_spell_off}
{xrst_code cpp} */
# include <cmath> // prototype for fabs
extern bool exp_2_for0(double *v0); // computes zero order forward sweep
extern bool exp_2_for1(double *v1); // computes first order forward sweep
bool exp_2_for2(void)
{ bool ok = true;
double v0[6], v1[6], v2[6];
// set the value of v0[j], v1[j], for j = 1 , ... , 5
ok &= exp_2_for0(v0);
ok &= exp_2_for1(v1);
v2[1] = 0.; // v1 = x
ok &= std::fabs( v2[1] - 0. ) <= 1e-10;
v2[2] = v2[1]; // v2 = 1 + v1
ok &= std::fabs( v2[2] - 0. ) <= 1e-10;
v2[3] = 2.*(v0[1]*v2[1] + v1[1]*v1[1]); // v3 = v1 * v1
ok &= std::fabs( v2[3] - 2. ) <= 1e-10;
v2[4] = v2[3] / 2.; // v4 = v3 / 2
ok &= std::fabs( v2[4] - 1. ) <= 1e-10;
v2[5] = v2[2] + v2[4]; // v5 = v2 + v4
ok &= std::fabs( v2[5] - 1. ) <= 1e-10;
return ok;
}
/* {xrst_code}
{xrst_spell_on}
{xrst_end exp_2_for2.cpp}
*/
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