1 package main 2  3 import ( 4     "fmt" 5     "strconv" 6     "os" 7     "bufio" 8 ) 9 10 //for的条件里不需要括号11 //for的条件里可以省略初始条件，结束条件和递增表达式,三个省略就是死循环12 //没有while语句，只留结束条件等于while13 14 func convertToBin ( n int ) string {15     result := ""16     for ; n > 0; n /= 2 {17         lsb := n % 218         result = strconv.Itoa( lsb ) + result19     }20     return  result21 }22 23 func printFlie( filename string) {24     file, err := os.Open( filename)25     if err !=nil{26         panic(err)27     }28 29     scanner := bufio.NewScanner( file)30 31     for scanner.Scan() {  //只有结束条件32         fmt.Println(scanner.Text())33     }34 }35 36 37 func main() {38     fmt.Println(39         convertToBin(5) , //10140         convertToBin(13), //1011 --> 110141     )42 43     printFlie("abc.txt")44 }