gistfile1.txt

0.00283329
0

test.cpp

#include <iostream>
#include <cmath>

template <typename T>
T dist(T a, T b) {
  T l2_a = 0.f;
  l2_a += a * a;
  T l2_b = 0.f;
  l2_b += b * b;
  return l2_a + l2_b - 2 * a * b;
}

int main() {
  double a, b;
  float c, d;
  a = 12.14362104;
  b = 12.14078775;
  c = a;
  d = b;

  std::cout << std::sqrt(dist(a, b)) << std::endl;
  std::cout << std::sqrt(dist(c, d)) << std::endl;
}