GetMaxDouble is a checking code snippet to get the maximal value of an double.
Operating system(s) or programming environment(s)
Lubuntu 15.04 (vivid)
Qt Creator 3.1.1
- G++ 4.9.2
Libraries used:
STL: GNU ISO C++ Library, version
4.9.2
Qt project file: ./CppGetMaxDouble/CppGetMaxDouble.pro
include(../../ConsoleApplication.pri) #Or use the code below # QT += core # QT += gui # greaterThan(QT_MAJOR_VERSION, 4): QT += widgets # CONFIG += console # CONFIG -= app_bundle # TEMPLATE = app # CONFIG(release, debug|release) { # DEFINES += NDEBUG NTRACE_BILDERBIKKEL # } # QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++ # unix { # QMAKE_CXXFLAGS += -Werror # } include(../../Libraries/Boost.pri) #Or use the code below # win32 { # INCLUDEPATH += \ # ../../Libraries/boost_1_54_0 # } SOURCES += main.cpp
#pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Weffc++" #pragma GCC diagnostic ignored "-Wunused-local-typedefs" #pragma GCC diagnostic ignored "-Wunused-but-set-parameter" #include <cassert> #include <iostream> #include <limits> #include <boost/numeric/conversion/bounds.hpp> #pragma GCC diagnostic pop ///GetMaxDouble returns the highest possible value of a double. ///From http://www.richelbilderbeek.nl/CppGetMaxDouble.htm double GetMaxDoubleStl() { return std::numeric_limits<double>::max(); } ///GetMaxDouble returns the highest possible value of a double. ///From http://www.richelbilderbeek.nl/CppGetMaxDouble.htm double GetMaxDoubleBoost() { return boost::numeric::bounds<double>::highest(); } int main() { assert(GetMaxDoubleStl() == GetMaxDoubleBoost()); std::cout << GetMaxDoubleBoost() << '\n' << GetMaxDoubleStl() << std::endl ; } /* 1.79769e+308 1.79769e+308 Press <RETURN> to close this window... */