golang指针修改值

package main

import "fmt"

func main(){
	x,y := 1,2
	swap(&x,&y)
	fmt.Println(x,y)
}

func swap(a,b *int){
	t := *a
	*a = *b
	*b = t
}

//修改不成功
//func swap(a,b *int){
//	b,a = a,b
//}