【面试题】反转整数

func reverse(x int) int {
        y := int32(x)
        var ans int32
        for y != 0 {
                temp := ans*10 + y%10
                if temp/10 != ans {
                        return 0
                }
                ans = temp
                y = y / 10
        }
        return int(ans)
}

func Reverse(x int32) int32 {

    var xx, rx, tnum, pos, negative int32
    //备份原值
    xx = x

    var posNum, posStart, maxLan int
    //int32最大长度
    maxLan = 11

    //判断是否负数
    negative = 1
    if x < 0 {
        negative = -1
        xx = xx * -1
    }

    for i := maxLan; i >= 0; i-- {
        tnum = int32(math.Pow10(i))
        if xx >= tnum {
            pos = xx / tnum
            if pos > 0 || posStart > 0 {
                if posStart == 0 {
                    posStart = 1
                }

                fmt.Println(i, pos)

                posNum++
                rx += pos * (int32(math.Pow10(posNum - 1)))
            }
            xx = xx - pos*tnum
        }
    }
    rx = rx * negative
    return rx
}

你这写的有点复杂了，而且还有 bug：Reverse(10010) 结果是 11，明显不对！