golang 写文件

package main

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

func main() {     

    fil, err := os.OpenFile("C:/Documents and Settings/xxx/Desktop/tax.txt", os.O_RDWR|os.O_APPEND, 0420)
    if err != nil {
        fmt.Printf("Error: %s\n", err)
        return
    }
    defer fil.Close()
    fil.WriteString("Hello World!\n")

}