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Pathological floating point problems: Difference between revisions
Pathological floating point problems (view source)
Revision as of 23:44, 17 November 2021
, 2 years ago→Task 2: Chaotic Bank Society
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===Task 2: Chaotic Bank Society===
A) Unlike Ruby, had to manually create "E" to sufficient precision.
<lang Ruby>require "big"
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{{Out}}
<pre>Bank balance after 25 years = 0.03993872967323021</pre>
B) Or from Factor, use large rational approximation for "E = 106246577894593683 / 39085931702241241".
<lang Ruby>require "big"
e = 106246577894593683.to_big_d.div(39085931702241241.to_big_d, 132)
balance = e - 1
1.upto(25) { |y| balance = (balance * y) - 1 }
puts "Bank balance after 25 years = #{balance.to_f}"</lang>
{{Out}}
<pre>Bank balance after 25 years = 0.03993873004901714</pre>
===Task 3: Rump's example===
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