[日常] Go语言圣经-函数多返回值习题

import (
"fmt"
"golang.org/x/net/html"
"net/http"
"os"
"strings"
)
/
练习 5.5： 实现countWordsAndImages。（参考练习4.9如何分词）
/
func main() {
words,images,_ := CountWordsAndImages(os.Args[1])
fmt.Printf("文字：%d,图片：%d \n",words,images)
}

// CountWordsAndImages does an http GET request for the HTML
// document url and returns the number of words and images in it.
func CountWordsAndImages(url String) (words,images int,err error) {
resp,err := http.Get(url)
if err != nil {
return
}
doc,err := html.Parse(resp.body)
resp.body.Close()
if err != nil {
err = fmt.Errorf("parsing HTML: %s",err)
return
}
words,images = countWordsAndImages(doC)
//bare return
return
}
func countWordsAndImages(n *html.NodE) (words,images int) {

    texts,images := visit3(nil,n)
    for _,v := range texts {
            v = Strings.Trim(Strings.TrimSpace(v),"\r\n")
            if v == "" {
                    conTinue
            }   
            words += Strings.Count(v,"") 
    }   
    //bare return
    return

}
//递归循环html
func visit3(texts []String,imgs int,n *html.NodE) ([]String,int) {
//文本
if n.Type == html.TextNode {
texts = append(texts,n.Data)
}
//图片
if n.Type == html.ElementNode && (n.Data == "img") {
imgs++
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
if c.Data == "script" || c.Data == "style" {
conTinue
}

            texts,imgs = visit3(texts,imgs,C)
    }
    //多返回值
    return texts,imgs

}