go读取文件内容写入另一文件中

go读取文件内容写入另一文件中

package main

import (
    "fmt"
    "os"
    "io"
)

func read()(c string){
    //读取文件
    f := "C:\\Users\\Administrator\\Desktop\\go\\1.txt"
    file, _ := os.Open(f)
    defer file.Close()
    var buf [128]byte // 记录一次读取的量
    var content []byte // 定义切片，整体的数据量
    for {
        n, err := file.Read(buf[:]) // 根据
        if err == io.EOF {
            // 读取结束
            fmt.Println("read end")
            break
        }
        if err != nil {
            fmt.Println("read file err ", err)
            return
        }
        //向切片追加新元素
        content = append(content, buf[:n]...)
    }

    // fmt.Println(content)
    c = string(content)
    return 
}

func write(content string){
    writeFile := "C:\\Users\\Administrator\\Desktop\\go\\write.txt"
    fileto, _ := os.OpenFile(writeFile, os.O_WRONLY, 0666)
    defer fileto.Close()
    res,error :=fileto.WriteString(string(content))
    if error != nil {
        fmt.Println("write file err ", error)
        return
    }
    if res == 1002 {
        fmt.Println("write success")
        return 
    }
}

func main(){
    var c string =read()
    write(c)
}