36 lines
777 B
Java
36 lines
777 B
Java
/**
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* Created by Casper on 08-12-2015.
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*/
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public class FibIter {
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private static long fib_iter(long a) {
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long r = 0;
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long minus_one = 1;
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long minus_two = 0;
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if (a == 0) {
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r = 0;
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} else if (a == 1) {
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r = 1;
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} else {
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for (long i = 2; i <= a; i++) {
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r = minus_one + minus_two;
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minus_two = minus_one;
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minus_one = r;
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}
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}
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return r;
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}
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public static void main(String[] args) {
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long a = 0;
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long r = 0;
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a = Long.parseUnsignedLong(args[0]);
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r = fib_iter(a);
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System.out.println("fib(" + Long.toUnsignedString(a) + ") = " + r);
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}
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}
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