package main
import "fmt"

type s1 struct {
	a int
	b int
}

type s2 struct {
	c s1
	d int
}

type s3 struct {
	s1
	d int
}
func s3make(a, b, c int) s3 {
	return s3{s1:s1{a:a, b:b}, d:c}
}

func main() {
	as1 := s1{a:2, b:3}
	fmt.Println(as1)

	var as2 s2
	as2 = s2{c:s1{a:2, b:3}, d:5}
	fmt.Println(as2)
	fmt.Println(as2.c.a)

	as3 := s3make(4, 5, 7)
	fmt.Println(as3)
	fmt.Println(as3.a)
}