【面试题】反转整数

polaris · · 4500 次点击
```go package main func main() { num := 123456789 x := 0 for num != 0 { x = 10*x + num%10 num = num / 10 } print(x) } ```
#13
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```go 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 } ```
#1
polaris
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你这写的有点复杂了,而且还有 bug:`Reverse(10010)` 结果是 11,明显不对!
#2