packagemain
import"fmt"

typeIReaderinterface{
	Read(filestring)[]byte
}

typeIWriterinterface{
	Write(filestring,data[]byte)
}

//接口组合，这些默认就继承了Reader和Writer中的抽象方法
typeIReadWriterinterface{
	IReader
	IWriter
}

typeReadWriterstruct{

}

func(rw*ReadWriter)Read(filestring)[]byte{
	returnnil
}

func(rw*ReadWriter)Write(filestring,data[]byte){
	
}

funcmain(){
	rw:=new(ReadWriter)
	variRwIReadWriter=rw//ok
	fmt.Println(iRw)
}