golang|golang math/big 和 string bytes相互转化 golangmath

显式初始化

num := big.NewInt(math.MaxInt64) math.MaxInt64是最大的整数 num := big.NewInt(1999) fmt.Printf("Big int: %v\n", num)

【golang|golang math/big 和 string bytes相互转化】??显式初始化最大只能是math.MaxInt64，如果还想大，就得需要byte或者string
byte array -> big.Int

import "math/big"z := new(big.Int) z.SetBytes(byteSliceHere)orfunc Base64ToInt(s string) (*big.Int, error) { data, err := base64.StdEncoding.DecodeString(s) if err != nil { return nil, err } i := new(big.Int) i.SetBytes(data) return i, nil }

string -> big.Int

package mainimport ( "fmt" "math/big" )func main() { n := new(big.Int) n, ok := n.SetString("1234567890987", 10) if !ok { fmt.Println("SetString: error") return } fmt.Println(n) }

big.Int > string