ITK  4.13.0
Insight Segmentation and Registration Toolkit
WikiExamples/Statistics/GaussianDistribution.cxx
int main(int, char* [] )
{
gaussian->SetMean(2.0);
gaussian->SetVariance(1.0);
std::cout << gaussian->EvaluatePDF(2.1) << std::endl;
return EXIT_SUCCESS;
}