Reverse Integer ---- LeetCode 007

Posted 2020-07-01 徐岩

Reverse digits of an integer.

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

Solution 1:

class Solution {
public:
    int reverse(int x) 
    {
        int result = 0;
        while(x != 0)
        {
            if( x > 0 && result > (INT_MAX - x % 10) / 10 ||
                x < 0 && result < (INT_MIN - x % 10) / 10 )
                return 0;
            result = result * 10 + x % 10;
            x = x / 10;
        }
        return result;
    }
};

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