Herezh_dev/Util/suites/Suite_equidistante.cc

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// This file is part of the Herezh++ application.
//
// The finite element software Herezh++ is dedicated to the field
// of mechanics for large transformations of solid structures.
// It is developed by Gérard Rio (APP: IDDN.FR.010.0106078.000.R.P.2006.035.20600)
// INSTITUT DE RECHERCHE DUPUY DE LÔME (IRDL) <https://www.irdl.fr/>.
//
// Herezh++ is distributed under GPL 3 license ou ultérieure.
//
2023-05-03 17:23:49 +02:00
// Copyright (C) 1997-2022 Université Bretagne Sud (France)
// AUTHOR : Gérard Rio
// E-MAIL : gerardrio56@free.fr
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//
// For more information, please consult: <https://herezh.irdl.fr/>.
#include "Suite_equidistante.h"
#include "Sortie.h"
// affichage de la courbe
void Suite_equidistante::Affiche() const
{ cout << "\n suite equidistante de terme courant= " << U_0 << " ";
};
// interactif écran-clavier pour saisir les paramètres d'une suite
// si amplitude != 0 alors il faut n non négatif et:
// on a Somme_suite(n) = amplitude, ce qui permet pour les suites de réduire le nombre de paramètre à lire
void Suite_equidistante::Def_suite(double amplitude, int n)
{ if (amplitude == 0.)
{ cout << "\n valeur du terme initial U_0 de la suite ";
U_0=lect_double();
}
else
{ if (n < 0)
{ cout << "\n erreur pour la definition d'une suite geometrique, n est negatif ! "
<< "\n Suite_equidistante::Def_suite(double amplitude, int n) ";
Sortie(1);
}
else
{ U_0 = amplitude / (n+1);};
};
};
// ramène la somme de la suite de m à n
// de manière arbitraire pour n=-1 ==> 0
// pour n < -1 --> erreur
double Suite_equidistante::Somme_Suite(int n)
{ if (n > -2)
{ double ret = (n+1) * U_0;
return ret;
}
else
{ cout << "\n erreur n est inf a -1 "
<< "\n Suite_equidistante::Somme_Suite(int n)";
Sortie(1);
};
return 0.;
};