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///
/// This file is part of Rheolef.
///
/// Copyright (C) 2000-2009 Pierre Saramito <Pierre.Saramito@imag.fr>
///
/// Rheolef 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.
///
/// Rheolef 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 Rheolef; if not, write to the Free Software
/// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
///
/// =========================================================================
#include "bigfloat.h"
#include <iomanip>
#include <sstream>
#include <string>
using namespace std;
//
// N=digits10 is an argument of the bigfloat type
//
#ifdef DIGITS10
const int N = DIGITS10;
#else
const int N = 40;
#endif
int main(){
cout << setprecision(N); // digit10 == N;
bigfloat<N> zero;
cout << "zero = " << zero << endl;
// cstor, math library
bigfloat<N> sqrt5 = sqrt(bigfloat<N>(5));
cout << "sqrt(5) = " << sqrt5 << endl;
bigfloat<N> sqrt5_0 = sqrt(bigfloat<N>(5.0));
cout << "sqrt(5.0) = " << sqrt5_0 << endl;
// type conv & assignment
bigfloat<N> y;
y = "2.236067977499789696409173668731276235440618359612L0";
cout << "y = string = " << y << endl;
y = double(sqrt5);
cout << "y = double(sqrt(5)) = " << y << endl;
y = int(sqrt5);
cout << "y = int(sqrt(5)) = " << y << endl;
// do not send any warning !!!
int iy = y;
// operators
y = sqrt(bigfloat<N>(5));
cout << "-y = " << -y << endl;
bigfloat<N> z = y+y;
cout << "z = y+y = " << z << endl;
z = z/2;
cout << "z = z/2 = " << z << endl;
// computed assignment
z += y;
cout << "z += y = " << z << endl;
// comparator
cout << "z == y = " << (z==y) << endl;
cout << "z != y = " << (z!=y) << endl;
// to string
ostringstream os;
os << setprecision(N) << y;
string s = os.str();
cout << "string(y) = " << s << endl;
// math
bigfloat<N> t = log10(y);
cout << "t = log10(y) = " << t << endl;
cout << "Pi = " << bigfloat<N>::compute_pi() << endl;
cout << "digits = " << numeric_limits<bigfloat<N> >::digits << endl;
cout << "digits10 = " << numeric_limits<bigfloat<N> >::digits10 << endl;
cout << "epsilon = " << numeric_limits<bigfloat<N> >::epsilon() << endl;
}
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