Go语言指针访问结构体的方法

package main
import "fmt"
type Vertex struct {
    X int
    Y int
}
func main() {
    p := Vertex{1, 2}
    q := &p
    q.X = 1e9
    fmt.Println(p)
}

package main
import (
 "fmt"
 "time"
)
func testTimer1() {
 go func() {
  fmt.Println("test timer1")
 }()
}
func testTimer2() {
 go func() {
  fmt.Println("test timer2")
 }()
}
func timer1() {
 timer1 := time.NewTicker(1 * time.Second)
 for {
  select {
  case <-timer1.C:
   testTimer1()
  }
 }
}
func timer2() {
 timer2 := time.NewTicker(2 * time.Second)
 for {
  select {
  case <-timer2.C:
   testTimer2()
  }
 }
}
func main() {
 go timer1()
 timer2()
}