leetcode 7 --- Reverse Integer

Reverse digits of an integer.

Example1: x = 123, return 321
Example2: x = -123, return -321

题目比较简单，需注意一下几点：

1.x为负数

2.溢出
代码如下：

class Solution {
public:
int reverse(int x) {
bool flag = false;
if(x<0){
flag = true;
x = -x;
}
int result = 0;
while(x!=0){

if (result > INT_MAX/10 || result < INT_MIN/10){
return 0;
}

result = result * 10 + x%10;
x = x/10;
}

if(flag){
result = -result;
}

return result;

}
};