leetcode Palindrome Number

错误1：
sprintf打印一个整数时会造成前导零的问题

class Solution {public:    int getlen(int x){        int fx = abs(x);        return fx == 0 ? 1 : (((int)log10(fx)) + 1);    }    bool isPalindrome(int x) {        if(x < 0){            return false;        }        int len = x == 0 ? 1 : (((int)log10(x)) + 1);        if(len == 1){            return true;        }        int lsum = 0, rsum = 0;        int halfbitlen = (len & 1) ? ((len - 1)>>1):(len >> 1);        int rbase = (int)pow(10, halfbitlen);        int rightpart = x % rbase;        rbase *= (len & 1) ? (10) : 1;        int leftpart = x / rbase;        char numstrleft[100], numstrright[100];      //  int halfDigitLen = max(getlen(rightpart),getlen(leftpart));        int halfbase = 10;        for(int i = halfbitlen - 1; i >= 0; --i){            numstrleft[i] = rightpart % halfbase;            numstrright[i] = leftpart % halfbase;            rightpart /= halfbase;            leftpart /= halfbase;        }        for(int i = 0; i < halfbitlen; ++i){            if(numstrleft[i] != numstrright[halfbitlen - 1 - i]){                return false;            }        }        return true;    }};