进制回文数

#include <stdio.h>
bool huiwen(char a[], int n){

    int i, j;
    i = 0; j = n - 1;

    while (i < j){
        if (a[i] != a[j])
            return false;
        i++;
        j--;
    }

    return true;
}

int main(){
    char buffer[1001];
    int a;
    int temp;
    int counter = 0;
    int i;
    while (scanf("%d", &a) != EOF){
        int b = a;
        for ( i = 2; i <= 16; i++){
            b = a;
            counter = 0;
            while (b){
                temp = b % i;
                b /= i;
                if (temp >= 10){
                    buffer[counter] = temp - 10 + 'A';
                }
                else{
                    buffer[counter] = temp + '0';
                }
                counter++;
            }

            //printf("i = %d, counter = %d\n", i, counter);
            if (huiwen(buffer, counter)){
                break;
            }

        }//end for

        if (i >= 17){
            printf("No\n");
        }
        else{
            printf("Yes\n");
        }
    }

}