go 方法的继承和重写

继承：

package main
import "fmt"
 
type Human struct {
    name string
    age int
    phone string
}
 
type Student struct {
    Human //匿名字段
    school string
}
 
type Employee struct {
    Human //匿名字段
    company string
}
 
//在human上面定义了一个method
func (h *Human) SayHi() {
    fmt.Printf("Hi, I am %s you can call me on %s\n", h.name, h.phone)
}
 
func main() {
    mark := Student{Human{"Mark", 25, "222-222-YYYY"}, "MIT"}
    sam := Employee{Human{"Sam", 45, "111-888-XXXX"}, "Golang Inc"}
 
    mark.SayHi()
    sam.SayHi()
}

重写

package main
import "fmt"
 
type Human struct {
    name string
    age int
    phone string
}
 
type Student struct {
    Human //匿名字段
    school string
}
 
type Employee struct {
    Human //匿名字段
    company string
}
 
//Human定义method
func (h *Human) SayHi() {
    fmt.Printf("Hi, I am %s you can call me on %s\n", h.name, h.phone)
}
 
//Employee的method重写Human的method
func (e *Employee) SayHi() {
    fmt.Printf("Hi, I am %s, I work at %s. Call me on %s\n", e.name,
        e.company, e.phone) //Yes you can split into 2 lines here.
}
 
func main() {
    mark := Student{Human{"Mark", 25, "222-222-YYYY"}, "MIT"}
    sam := Employee{Human{"Sam", 45, "111-888-XXXX"}, "Golang Inc"}
 
    mark.SayHi()
    sam.SayHi()
}