Golang initializing the structure of the body

There are two ways to initialize a struct in **golang: 1. Declare the key of all fields, 2. Neither declares key, but value corresponds to the order one by one defined.

Although mode 1 is cumbersome, anonymous fields may not have to be initialized when there is an anonymous field in the defined struct, and the anonymous field needs to be initialized in mode 2, otherwise the compiler will error (too few values in struct initializer).
"Subclass" in Golang can "inherit" the method defined at the previous level, which is equivalent to the overloaded concept in OOP * *

Package main

Import (
    "FMT"
)

type language []string

type human struct {
    name string
    age  int
    sex  bool
}

type programmer struct {
    human company
    string
    language
}

func (H *human) introduce () {
    fmt. PRINTLN ("Human")
}

func (P *programmer) introduce () {
    fmt. PRINTLN ("Programmer's")
}

func main () {
    //  h: = human{name: "SDA", Age:123, Sex:true}
    P: = programmer{ Human:human{name: "SDA", Age:123, Sex:true}, Company: "Iflytek"}
    p.introduce ()
    p.human.introduce ()
}