Struktur der Grundlagen der Go-Sprache (Frühjahrskapitel)

//方式一
var student = map[string]string{
    "Name": "张三"，
    "Age":  "18"，
}
//方式二
var student2 = make(map[string]string， 10)
student2["Name"] = "张三"
student2["Age"] = "18"

type 自定义类型名 类型名
例:
type NewInt int

package main


import "fmt"


type NewInt int


func main() {
    var n1 NewInt = 1
    fmt.Println(n1)//结果为1
}

type 类型别名 = 类型名
例:
type Nint = int

package main


import "fmt"


type Nint = int


func main() {
    var n1 Nint = 1
    fmt.Println(n1)//1
}

package main


import "fmt"


type Nint1 int   //自定义类型
type Nint2 = int //类型别名


func main() {
    var n1 Nint1 = 1
    var n2 Nint2 = 1
    fmt.Printf("n1类型:%T，n2类型:%T"， n1， n2)
}

func main() {
  var s1 = Student{
    Name:   "张三"，
    Age:    18，
    Height: 180，
    Weight: 120，
    phone:  "6666666"，
  }
  fmt.Println(s1)
}

func main() {
  var s1 Student
  s1.Name = "张三"
  s1.Age = 18
  s1.Height = 180
  s1.Weight = 120
  s1.phone = "66666"
}

func main() {
  var car struct {
    Name   string;
    CarNum string
  }
  car.Name = "QQ"
  car.CarNum = "京6666"
  fmt.Println(car) //{QQ 京6666}
}

func main() {
  var car = struct {
    Name   string;
    CarNum string
  }{
    Name:   "QQ"，
    CarNum: "京6666"，
  }


  fmt.Println(car) //{QQ 京6666}
}

func main() {
  //方式一，等于一个空&结构体在赋值
  var s1 = &Student{}
  s1.Name = "张三"
  //...
  //方式二，直接赋值
  var s2 = &Student{
    Name:   ""，
    Age:    0，
    Height: 0，
    Weight: 0，
    phone:  ""，
  }
  //方式三不可以
  //var s3 &Student//error
}

package main


import "fmt"


type Student struct {
  Name                string
  Age， Height， Weight int
  phone               string
}


func sayStudent1(s Student) {
  fmt.Println(s)
}
func sayStudent2(s *Student) {
  //如果穿的是结构体地址，那么接收就需要用*
  fmt.Println(s)
}
func main() {
  var s1 = Student{
    Name:   "111"，
    Age:    0，
    Height: 0，
    Weight: 0，
    phone:  "1111"，
  }
  var s2 = &Student{
    Name:   "2222"，
    Age:    0，
    Height: 0，
    Weight: 0，
    phone:  "2222"，
  }
  sayStudent1(s1)
  sayStudent2(s2)
}

func main() {
  var s1 = Student{}
  fmt.Println(s1)
}