Learn Golang in Days - Day 13

简介

• 递归
• 递归，就是自己调用自己
• Go语言支持递归
• 类型转换

递归的应用

package main

import "fmt"

func Factorial(n uint64)(result uint64) {
    if(n > 0) {
        result = n * Factorial(n-1)
    }
    
    return 1
}

func main() {
    var i int =15
    fmt.Printf("%d 的阶乘是 %d\n", i, Factorial(uint64(i)))
}

斐波那契数列

• 通过Go语言的递归函数实现斐波那契数列

package main

import "fmt"

func fibonacci(n int) int {
    if n < 2 {
        return n
    }

    return fibonacci(n-2) + fibonacci(n-1)
}

func main() {
    var i int
    for i = 0; i < 10; i++ {
        fmt.Printf("%d\t", fibonacci(i))
    }
}

类型转换

• 类型转换

package main

import "fmt"

func main() {
    var sum int = 18
    var count int = 5
    var mean float32

    mean = float32(sum) / float32(count)

    fmt.Printf("%f / %d = %f", float32(sum), count, mean)
}