[LeetCode-7] Reverse Integer

Reverse Integer

Reverse digits of an integer.

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

 

做大水题有益于身心健康……

 

class Solution {
public:
    int reverse(int x) {
        // Start typing your C/C++ solution below
        // DO NOT write int main() function
        int sign = 1, tens = 1, result = 0;
        
        if (x < 0) {
            x = -x;
            sign = -1;
        }
        while (x > 0) {
            result *= 10;
            result += x % 10;
            x /= 10;
        }
        return result * sign;
    }
};