Created
August 15, 2012 22:30
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iterfib in various languages
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-- iterfib.cc -- | |
#include <iostream> | |
#include <stdint.h> | |
using namespace std; | |
uint64_t fib(int k) { | |
uint64_t ln = 1; | |
uint64_t n = 1; | |
uint64_t temp; | |
for (int i = 2; i < k; ++i) { | |
temp = ln; | |
ln = n; | |
n += temp; | |
} | |
return n; | |
} | |
int main(int argc, char const *argv[]) | |
{ | |
uint64_t k = 0; | |
for (size_t i = 0; i < 1000000; ++i) { | |
k |= fib(92); | |
} | |
cout << k << endl; | |
} | |
-- iterfib.py -- | |
#!/usr/bin/env python | |
# encoding: utf-8 | |
def fib(k): | |
ln, n = 1, 1 | |
for i in xrange(2,k): | |
ln, n = n, ln + n | |
return n | |
fib(92) | |
fib(92) | |
fib(92) | |
fib(92) | |
fib(92) | |
fib(92) | |
import time | |
s = time.clock() | |
fib(92) | |
print "Elapsed: %.2f musecs" % ((time.clock() - s)*1e6) | |
-- iterfib.jl -- | |
function fib(k::Uint64) | |
ln::Uint64, n::Uint64 = 1, 1 | |
for i=2:(k-1) | |
ln, n = n, ln + n | |
end | |
return n | |
end | |
const x = convert(Uint64, 92) | |
fib(x) | |
fib(x) | |
fib(x) | |
fib(x) | |
fib(x) | |
fib(x) | |
t = @elapsed fib(x) | |
print("Elapsed: ", t*1e6, " musecs\n") |
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