構造体

sample.go

package main

import (
  "fmt"
)

type Space struct {
  X int
  Y int
  Z int
}

type Planet struct {
  Name     string
  Location Space
  Status   bool
}

func main() {
  putPlanet()
  putEmpty()
  withPointer()
  // withNew()
}

func putPlanet() {
  space  := Space{ 12, 24, 0 }
  space.Z = 36

  planet := Planet{ Name: "Moon", Location: space, Status: true }

  fmt.Println( "Space:", space )
  fmt.Println( "Planet:", planet )
}

func putEmpty() {
  space := Space{}
  planet := Planet{}

  fmt.Println( "Space:", space )
  fmt.Println( "Planet:", planet )
}

func withPointer() {
  space1 := Space{}
  space2 := &space1
  space2.Z = 12345

  fmt.Println( "Space:", space1 )
  fmt.Println( "Space:", space2 )
}

// func withNew() {
//   var space *Space = new( Space )
//   planet := Planet{ Name: "Mars", Location: space }

//   fmt.Println( "Space:", space )
//   fmt.Println( "Planet:", planet )
// }