golang func (c AppController) example() 和func (c *AppController) example() 区别

package main

import (
    "fmt"
)

type App struct{
    Name string
    Num int
}
func (c *App)getName(){
    c.Name = "myname"
}
func (c App)getNum()App{
    c.Num = 11
    return c
}
func main() {
    app := &App{}
    app.getName()
    app2 := app.getNum()
    fmt.Println(app,app2)
}
/*
app:  &{myname 0}
app2: {myname 11}
*/