package main

import (
	"fmt"
	"net/http"
)

type helloHandler int

func (hello helloHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "Hello World %d!", hello)
}

func main() {
	var world helloHandler
	http.ListenAndServe("localhost:8080", world)
}