Created
March 7, 2018 13:23
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| fun main(argv: Array<String>) { | |
| println(fib(1)) | |
| println(fib(2)) | |
| println(fib(10)) | |
| println(fib(100)) | |
| } | |
| fun fib(end: Int): Long { | |
| if (end == 0) { | |
| return 0L | |
| } | |
| if (end == 1) { | |
| return 1L | |
| } | |
| return fibIter(2, end, 1L, 0L) | |
| } | |
| tailrec fun fibIter(cur: Int, end: Int, last: Long, last2: Long): Long { | |
| if (end <= cur) { | |
| return last + last2 | |
| } | |
| return fibIter(cur + 1, end, last + last2, last) | |
| } | |
| // Warning: A function is marked as tail-recursive but no tail calls are found. | |
| tailrec fun fibIterFailed(cur: Int, end: Int, last: Long, last2: Long): Long { | |
| if (end <= cur) { | |
| return last + last2 | |
| } | |
| return fibIter(cur + 1, end, last + last2, last) + 1 | |
| } |
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