PiCalculator.cpp

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#include "ElementsExamples/PiCalculator.h"
 
namespace Elements {
namespace Examples {
 
void PiCalculator::calculate(unsigned int terms) {
 
  double pi = 0.0;
  // Leibniz formula for pi
  double numerator   = -1.0;
  double denominator = -1.0;
 
  for (unsigned int ii = 0; ii < terms; ++ii) {
    numerator *= -1;
    denominator += 2.0;
    pi += numerator / denominator;
  }
 
  pi *= 4.0;
 
  m_show_result_callback(pi);
}
 
void PiCalculator::setShowResultCallback(show_result_callback_type f) {
 
  m_show_result_callback = f;
}
 
}  // namespace Examples
}  // namespace Elements