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hello-algo/codes/go/chapter_computational_compl.../recursion.go

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686 B

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