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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_for1.cpp}
exp_2: Verify First 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
bool exp_2_for1(double *v1) // double v1[6]
{ bool ok = true;
double v0[6];
// set the value of v0[j] for j = 1 , ... , 5
ok &= exp_2_for0(v0);
v1[1] = 1.; // v1 = x
ok &= std::fabs( v1[1] - 1. ) <= 1e-10;
v1[2] = v1[1]; // v2 = 1 + v1
ok &= std::fabs( v1[2] - 1. ) <= 1e-10;
v1[3] = v1[1] * v0[1] + v0[1] * v1[1]; // v3 = v1 * v1
ok &= std::fabs( v1[3] - 1. ) <= 1e-10;
v1[4] = v1[3] / 2.; // v4 = v3 / 2
ok &= std::fabs( v1[4] - 0.5) <= 1e-10;
v1[5] = v1[2] + v1[4]; // v5 = v2 + v4
ok &= std::fabs( v1[5] - 1.5) <= 1e-10;
return ok;
}
bool exp_2_for1(void)
{ double v1[6];
return exp_2_for1(v1);
}
/* {xrst_code}
{xrst_spell_on}
{xrst_end exp_2_for1.cpp}
*/
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