【面试题】反转整数

polaris · · 4494 次点击
感觉有些熟悉,原来以前刷过这道题,又手敲一遍 ```go func reverse(x int) ( num int) { for x != 0 { num = num*10 + x%10 x = x / 10 } MaxInt32 := 1<<31 - 1 MinInt32 := -1 << 31 if num > MaxInt32 || num < MinInt32 { return 0 } return } ``` from: [https://leetcode.com/problems/reverse-integer/description/](https://leetcode.com/problems/reverse-integer/description/)
#12
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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