some try on func swap about & and *

import "fmt"

func swap(x,y *int )  {
   //x ,y = y,x //fault

    /*
    t := *x
   *x = *y
   *y = t
   */     //true

    //*x , *y = *y ,*x //true

    //x , y = y , x //fault

}
func pri(a,b int)  {
   fmt.Println(a)
   fmt.Println(b)
}
func main ()  {

   var a int = 1
   var b int = 2
   pri(a,b)
   swap(&a,&b)
   pri(a,b)
}