Add comment about which method is used to approximate pi

11 years ago · ed40922f52
parent f98e46dbe4
commit ed40922f52
1 changed files with 1 additions and 0 deletions
--- a/approximate-pi.c
+++ b/approximate-pi.c
@ -6,6 +6,7 @@ double approximate_pi(unsigned int steps) {
  double approximate_pi = 4.0;
  bool subtract = true;

+  /* Gregory–Leibniz series */
  for (unsigned int i = 2; i <= steps; i++) {
    if (subtract) {
      approximate_pi -= (4.0 / (i * 2 - 1));