// ptr.go.

package main

import "fmt"

type ClassX struct {
	Name string
	Age  int
}

func main() {
	var obj *ClassX
	initApp(obj)
	fmt.Println(obj)
	return
}

func initApp(x *ClassX) {
	tmp := NewClassXObject()
	x = tmp
	fmt.Println("tmp:", tmp)
	fmt.Println("x:", x)
}

func NewClassXObject() *ClassX {
	x := new(ClassX)
	x.init()
	return x
}

func (o *ClassX) init() {
	o.Age = 123
	o.Name = "John"
}