前往：如何划分大量数字？

Question

I'm new in Golang and my problem is:

I have two byte arrays of 64 elements each, let's name them "A" and "B". Each of those arrays represent an unsigned integer.

I wish to produce another 64-bytes array "R" representing the result of (A / B).

Any ideas?

// pre-condition: A and B have 64 bytes each
// A and B each represent an unsigned integer
// R = (A / B)

func divideByteArrays(A, B []byte) []byte {
    R := make([]byte, 64)
    // ... do something ...
    return R
}

Thanks in advance!

EDIT:

is it possible to use "math/big" to achieve that goal ?

Answer 1

https://play.golang.org/p/T5R8fB8q60

package main

import (
    "math/big"
    "fmt"
)

func divideByteArrays(A, B []byte) []byte {
    var AI, BI, R big.Int
    AI.SetBytes(A)
    BI.SetBytes(B)
    R.Div(&AI, &BI)
    return R.Bytes()
}

func main() {
    a_array := make([]byte, 64)
    b_array := make([]byte, 64)

    for i := 0; i < 64; i++ {
        a_array[i] = 4
        b_array[i] = 2
    }

    fmt.Println(divideByteArrays(a_array, b_array))
}