print_file_as_binary.go

package main

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

func main() {
	f, err := os.Open("print_file_as_binary.go")
	if err != nil {
		log.Fatal("Error while trying to open file", err)
	}
	defer f.Close()

	r := bufio.NewReader(f)

	b, err := r.ReadByte()
	for ; err == nil; b, err = r.ReadByte() {
		fmt.Printf("%08b", b)
	}

	println()

	if err != io.EOF {
		log.Fatal("unexpected error while reading bytes", err)
	}
}