binary - How to convert an integer to binary form in Go and vice versa

Question

How do i convert an Integer to binary form?

I'm currently working on a program that takes an integer and converts it to binary form. It should also take the binary number and reverse it and convert it back to an integer and print it out.

i.e.

12 -> 1100 -> 0011 -> 3

So the program should basically: Input: 12 Output: 3

package main

import (
    "fmt"
    "strconv"
)

var j int

func main() {
    fmt.Scan(&j)
    n := int64(j)
    y := strconv.FormatInt(n, 2)
    fmt.Println(y)
    reverse(y)
}

func reverse(y string) {
}

Answer 1

您可能想使用encoding/binary。

示例（goplay）：

package main

import "fmt"
import "encoding/binary"
import "bytes"

func main() {
    j := int32(5247)
    buf := new(bytes.Buffer)
    err := binary.Write(buf, binary.BigEndian, j)
    if err != nil {
        fmt.Println(err)
        return
    }
    var k int32
    err = binary.Read(buf, binary.BigEndian, &k)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println(k)
}