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// inverse_gamma_example.cpp
// Copyright Paul A. Bristow 2010.
// Use, modification and distribution are subject to the
// Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt
// or copy at http://www.boost.org/LICENSE_1_0.txt)
// Example 1 of using inverse gamma functions.
#include <boost/math/special_functions/gamma.hpp>
using boost::math::gamma_p_inv; // Compute x given a
//using boost::math::gamma_q_inv;
//using boost::math::gamma_p_inva; // Compute a given x
//using boost::math::gamma_q_inva;
#include <iostream>
using std::cout; using std::endl;
#include <iomanip>
using std::setprecision;
#include <cmath>
using std::sqrt;
#include <limits>
int main()
{
cout << "Example 1 using Inverse Gamma function. " << endl;
#ifdef BOOST_NO_CXX11_NUMERIC_LIMITS
int max_digits10 = 2 + (boost::math::policies::digits<double, boost::math::policies::policy<> >() * 30103UL) / 100000UL;
cout << "BOOST_NO_CXX11_NUMERIC_LIMITS is defined" << endl;
#else
int max_digits10 = std::numeric_limits<double>::max_digits10;
#endif
cout << "Show all potentially significant decimal digits std::numeric_limits<double>::max_digits10 = "
<< max_digits10 << endl;
cout.precision(max_digits10); //
double x = 1.;
double a = 10;
double r = boost::math::gamma_q_inv(a ,x);
cout << " x = " << x << ", = gamma_q_inv(a,x)" << r << endl; //
return 0;
} // int main()
/*
Output is:
*/
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