//将float64转成精确的int64
func Wrap(num float64, retain int) int64 {
return int64(num * math.Pow10(retain))
}
//将int64恢复成正常的float64
func Unwrap(num int64, retain int
//将float64转成精确的int64
func Wrap(num float64, retain int) int64 {
return int64(num * math.Pow10(retain))
}
//将int64恢复成正常的float64
func Unwrap(num int64, retain int