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¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
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 PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.