package main
import (
"fmt"
"reflect"
)
//跟C语言或其它语言一样，也有结构体struct。C语言中用关键词typedef来给结构体定义，Go中用的都是type。struct 语法格式：type typeName struct {...} ,按照对象的理解：struct就是类，函数就是方法。
type person struct {
name string
age int32
}
type course []string
type student struct {
name string
age int32
grade string
}
type class struct {
student //匿名字段，struct
course //匿名字段，自定义类型
int32 //内置类型做完匿名字段
teacher string
}
type goods struct {
name string "goods_name"
price float64 "goods_price"
}
func main() {
//单独声明和赋值
var p1 person
p1.name = "zengzhihai"
p1.age = 40
//直接声明和赋值
p2 := person{"xiaogao", 20}
//通过 field:value 的方式初始化,这样可以任意顺序
p3 := person{age: 22, name: "xiaoqing"}
fmt.Println(p1, p2, p3)
stu1 := class{student: student{"xiaoming", 18, "高三"}, teacher: "杰伦"}
//修改course字段
stu1.course = make([]string, 6)
stu1.course[0] = "math"
stu1.course = append(stu1.course, "china")
//修改匿名内置字段
stu1.int32 = 5
fmt.Println(stu1)
g := &goods{"zhuihui", 40}
s := reflect.TypeOf(g).Elem() //通过反射获取type的定义
for i := 0; i < s.NumField(); i++ {
fmt.Println(s.Field(i).Tag) // 讲tag打印出来
}
}
