for循环；变长参数；

package main

import (
    "fmt"
)

func main() {
    //i := 5
    //for i > 0 {
    //  i -= 1
    //  fmt.Println(i)
    //}

    str := "thankyouLORD"
    for pos, char := range str {
        fmt.Printf("Character on position %d is: %c \n", pos, char)
    }

    //min(7, 1, 9) //传递变长参数
    //f1()
    a()
    callback(1, Add)
}

func Add(a, b int) {
    fmt.Printf("The sum of %d and %d is: %d\n", a, b, a+b)
}
func callback(y int, f func(int, int)) {
    f(y, 2) // this becomes Add(1, 2)
}

func a() {
    i := 0
    defer fmt.Println(i)
    i++
    return
}

func min(a ...int) { //传递变长参数
    for _, v := range a {
        fmt.Println(v)
    }
}

func f1() {
    fmt.Printf("-----------f1----------")
    f2()
    //defer f2()
    fmt.Println()
    fmt.Printf("--------------f1-1--------")
    fmt.Println()
}
func f2() {
    fmt.Printf("---------------f2--------------")
}