FloatingPointExceptions

VTKExamples/Cxx/SimpleOperations/FloatingPointExceptions

Description

This example makes the illegal division by zero produce an error: Error: Floating point exception detected. Signal 8 rather than simply store "inf" in y.

Code

FloatingPointExceptions.cxx

#include <vtkFloatingPointExceptions.h>

// Avoid the "potential divide by 0" warning from the Microsoft
// compiler, since this example intentionally divides by 0
#ifdef _MSC_VER
#pragma warning (disable: 4723)
#endif

int main(int, char *[])
{
  // Disabled by default with gcc or visual studio.
  // Enabled by default by Borland CC.
  vtkFloatingPointExceptions::Enable(); 

  double x = 0.0;
  double y = 1.0/x; // floating-point exception

  std::cout << "x: " << x << " y: " << y << std::endl;

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(FloatingPointExceptions)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(FloatingPointExceptions MACOSX_BUNDLE FloatingPointExceptions.cxx )

target_link_libraries(FloatingPointExceptions ${VTK_LIBRARIES})

Download and Build FloatingPointExceptions

Click here to download FloatingPointExceptions and its CMakeLists.txt file. Once the tarball FloatingPointExceptions.tar has been downloaded and extracted,

cd FloatingPointExceptions/build 

If VTK is installed:

cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./FloatingPointExceptions

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.