擅长:python、mysql、java
<p>请参阅<a href="http://packages.python.org/bigfloat/" rel="nofollow">bigfloat</a>包。在</p>
<pre><code>from bigfloat import *
setcontext(quadruple_precision)
def catalanFormula(n):
result = BigFloat(1)
for k in range(2, n + 1):
result *= ((BigFloat(n) + BigFloat(k)) / BigFloat(k))
return result
catalanFormula(30)
</code></pre>
<p>输出:</p>
^{pr2}$