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ruby--ruby/sample/pi.rb
knu 02a8d06fa8 Improve.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3186 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2002-12-19 20:56:37 +00:00

18 lines
323 B
Ruby

#!/usr/local/bin/ruby
k, a, b, a1, b1 = 2, 4, 1, 12, 4
loop do
# Next approximation
p, q, k = k*k, 2*k+1, k+1
a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
# Print common digits
d = a / b
d1 = a1 / b1
while d == d1
print d
$stdout.flush
a, a1 = 10*(a%b), 10*(a1%b1)
d, d1 = a/b, a1/b1
end
end