C++数字逆转

Posted 2021-11-30 didiaoxiaoguai

输入: 123
输出: 321

输入: -123
输出: -321

int reverse(int x)
{    
    int res = 0;
    while(x)
    {
         int tmp = x%10;
         x/=10;
         res = res * 10 + tmp; 
    }
        return res;
}