多态

package main  

import "fmt"  

type act interface {  

    write()  
}  

type xiaoming struct {  

}  


type xiaofang struct {  

}  


func (xm *xiaoming) write() {  

    fmt.Println("xiaoming write")  
}  

func (xf *xiaofang) write() {  

    fmt.Println("xiaofang write")  
}  


func main() {  

    var w act;  

    xm := xiaoming{}  
    xf := xiaofang{}  

    w = &xm  
    w.write()  

    w = &xf  
    w.write()  
}