Go语言中结构体的高级技巧分享

type Person struct {
    Name string
    Age  int
}
type Student struct {
    P      Person // 组合了Person结构体
    School string
}
func main() {
    s := Student{Person{"Tom", 18}, "High School"}
    fmt.Println(s.P.Name, s.P.Age, s.School) // 输出 Tom 18 High School
}

type Address struct {
    Province string
    City     string
}
type Person struct {
    Name    string
    Age     int
    Address Address
}
p := Person{Name: "Tom", Age: 18, Address: Address{Province: "Beijing", City: "Chaoyang"}}
fmt.Println(p.Name, p.Age, p.Address.Province, p.Address.City)

type Person struct {
    Name string
    Age  int
}
p := &Person{Name: "Tom", Age: 18}
fmt.Println((*p).Name, (*p).Age) // 输出：Tom 18
fmt.Println(p.Name, p.Age)       // 输出：Tom 18

type Address struct {
    Province string
    City     string
}
type Person struct {
    Name string
    Age  int
    Address
}
p := Person{Name: "Tom", Age: 18, Address: Address{Province: "Beijing", City: "Chaoyang"}}
fmt.Println(p.Name, p.Age, p.Province, p.City)

package main
import "fmt"
type Person struct {
    name string
    age int
}
func (p *Person) SayHello() {
    fmt.Println("Hello, my name is", p.name, ", I'm", p.age, "years old.")
}
func main() {
    p := &Person{"Tom", 18}
    p.SayHello()
}

package main
import "fmt"
type Person struct {
    name string
    age  int
}
func (p *Person) SayHello() {
    fmt.Println("Hello, my name is", p.name, ", I'm", p.age, "years old.")
}
type Student struct {
    Person
    score int
}
func main() {
    s := &Student{Person{"Tom", 18}, 90}
    s.SayHello()
    fmt.Println("My score is", s.score)
}

package main
import "fmt"
type Animal interface {
    Say()
}
type Cat struct{}
func (c *Cat) Say() {
    fmt.Println("Meow!")
}
type Dog struct{}
func (d *Dog) Say() {
    fmt.Println("Woof!")
}
func main() {
    var a Animal
    a = &Cat{}
    a.Say()
    a = &Dog{}
    a.Say()
}