概述

• & 取地址
• • 取值

swap

package main
import "fmt"
func swap(a *int,b*int){
    t:=*a
    *a = *b
    *b =t
}
func main() {
    a,b :=10,20
    fmt.Println("a=",a,"b=",b)
    swap(&a,&b)
    fmt.Println("a=",a,"b=",b)
}

a= 10 b= 20
a= 20 b= 10