seberm

/***************************************************************************
 *   Copyright (C) 2008 by Šabart Otto                                     *
 *   seberm@gmail.com                                                      *
 *                                                                         *
 *   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 2 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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/


//...> quadratic.cpp

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <iostream>
#include <cmath>
#include "quadratic_class.h"

using namespace std;

//...Konstruktor
Quadratic::Quadratic () {
//...Zatim nepotrebna deklarace
}


//...Welcome message
void Quadratic::welcome () {
  cout << "Vitejte v programu na pocitani kvadratickych rovnic\n"
       << "---------------------------------------------------\n";
}


//...Discriminant
void Quadratic::f_disc (double* f_a, double* f_b, double* f_c) {
  this->discriminant = ((*f_b) * (*f_b)) - (4 * (*f_a) * (*f_c));
  cout << this->discriminant;
}


//...Zobrazi vysledek a pocet reseni rovnice
void Quadratic::result (double* f_a, double* f_b, double* f_c) {
  this->f_disc (f_a, f_b, f_c);


  if ((this->discriminant == 0) && (*f_a && *f_b && *f_c != 0)) { //...opravittt!!!!!
    cout << "Rovnice ma jedno reseni.\n";
    cout << "Vysledek je: " << (-*f_b) / (2 * (*f_a)) << "\n";
  }

  if (this->discriminant > 0) {
    cout << "Rovnice ma dve reseni.\n";
    cout << "Prvni vysledek je: " << ((-*f_b) - (sqrt(this->discriminant))) / (2 * (*f_a)) << "\nDruhy vysledek je: " << ((-*f_b) + (sqrt(this->discriminant))) / (2 * (*f_a)) << "\n";
  }

  if (this->discriminant < 0)
    cout << "Rovnice nema reseni!\n";



}


//...Destruktor
Quadratic::~Quadratic () {
//...Zatim nepotrebna deklarace
}


//...The Main Function...//
//## vyuzit predani parametru pri startu programu.....
int main(int argc, char *argv[])
{
  double a = 0.0, b = 0.0, c = 0.0;
char vstup;
  //...The instance of class Quadratic
  Quadratic q_rovnice;

  //...User welcome
  q_rovnice.welcome ();

  do {
    cout << "\nZadejte hodnotu a:\n";
    cin >> a;
    cout << "Zadejte hodnotu b:\n";
    cin >> b;
    cout << "Zadejte hodnotu c:\n";
    cin >> c;

    //...Show the quadratic roots
    q_rovnice.result (&a, &b, &c);

    cout << "\nChcete pocitat dalsi rovnici?\n";
    cout << "'y' pro 'Ano' ........ 'n' pro 'Ne': ";
    cin  >> vstup;
    cout << "\n";
  }
  while (vstup == 'y' || vstup == 'Y');

  return EXIT_SUCCESS;
}