This will fail on extremely small and extremely large inputs, as well as those like this
3.1415900000... 00000124123
This is basically due to me having to fight with the multiple-precision library. I am not an experienced user and while I'm sure there's a better way, I chose not to hack around with it.
Irrationals work fine, i.e.,
$ python ./evilno.py "4*atan(1)"
Says that's evil (that's pi), and
$ python ./evilno.py "(sqrt(5) + 1)/2
Says that's evil too (that's phi)
See:
http://pastebin.com/UqkQH7DA
Or below, if the link becomes broken.
#!/bin/python
from sympy import sympify
import sys
ExpressionString = ""
if len (sys.argv) != 2:
? ? ExpressionString = raw_input ('Enter the expression: ')
else:
? ? ExpressionString = sys.argv [1]
Expression = sympify (ExpressionString, rational=True)
Sum = 0
Precision = 1000
while Sum <= 666:
? ? Digits = map (int, str (Expression.evalf (Precision)).split ('.') [1])
? ? for Num in Digits:
? ? ? ? Sum += Num
? ? ? ? if Sum == 666:
? ? ? ? ? ? print "Call the priests! This hellish thing!"
? ? ? ? ? ? sys.exit ()
? ? if Sum > 666 or Expression - Expression.evalf (Precision + 100) == 0:
? ? ? ? print "We're safe, it's harmless...."
? ? ? ? sys.exit ()
? ? Precision += 100
you need to specify the language..are you using C or C++, OR JAVA
Write a program which indicates whether a number is evil or not.
An evil number is a number which has the sum of its first n-digits, for some positive integer n, equal to 666.
Example: pi and phi are evil (the sum of their first 100 something digits is 666).
I don't even know if its possible to create such a program. Thank you in advance.
