代码

package main

import (
	"fmt"
	"io"
	"net/http"
	"os"
)

var url, path string

func main() {
	if len(os.Args) != 3 {
		fmt.Println("usage:wget.exe http://Y4er.com/cmd.exe cmd.exe")
		os.Exit(0)
	}
	url, path = os.Args[1], os.Args[2]
	fmt.Println("你要下载的文件是：" + url)
	fmt.Println("将要保存到：" + path)
	Download(url, path)
}
func Download(url string, path string) {
	out, err := os.Create(path)
	check(err)
	defer out.Close()

	res, err := http.Get(url)
	check(err)
	defer res.Body.Close()

	_, err = io.Copy(out, res.Body)
	check(err)
	fmt.Println("保存成功，自行检查" + path)
}
func check(err error) {
	if err != nil {
		panic(err)
	}
}

编译好的win64位下载链接：http://Y4er.com/file/go-wget.exe