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40 lines
686 B
40 lines
686 B
// File: recursion.go
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// Created Time: 2023-08-28
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// Author: Reanon (793584285@qq.com)
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package chapter_computational_complexity
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/* 递归 */
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func recur(n int) int {
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// 终止条件
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if n == 1 {
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return 1
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}
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// 递:递归调用
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res := recur(n - 1)
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// 归:返回结果
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return n + res
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}
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/* 尾递归 */
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func tailRecur(n int, res int) int {
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// 终止条件
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if n == 0 {
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return res
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}
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// 尾递归调用
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return tailRecur(n-1, res+n)
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}
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/* 斐波那契数列:递归 */
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func fib(n int) int {
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// 终止条件 f(1) = 0, f(2) = 1
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if n == 1 || n == 2 {
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return n - 1
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}
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// 递归调用 f(n) = f(n-1) + f(n-2)
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res := fib(n-1) + fib(n-2)
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// 返回结果 f(n)
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return res
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}
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