Backup source of M_PI (No. 1)

• Backup list
• View the backup.
• M_PI has been deleted.
  • 1 (2015-09-13 (Sun) 22:10:12)

[[C]]

- C言語(標準)にM_PIは無い
--  http://qnighy.hatenablog.com/entry/2015/05/22/225558