func main() {
fmt.Printf("Hello world\n")
fmt.Printf("%s, %s\n", hello.Hello(), hello.World())
i := 4
fmt.Printf("foo=%d, bar=%d\n", foo.Foo(i), foo.Bar(i))
}
func main() {
Seed(100)
fmt.Println("Random:", Random())
hello.Hello()
}
func main() {
hello.Hello("GO")
}