Given an integer find the immediate larger integer which is a palindrome

// #palindrome #C #Programming #String 

#include <stdio.h>
#include <string.h>

typedef unsigned int uint;

uint find_next_palin(uint inp);

main()
{
        uint num;
        printf("enter the number: ");
        scanf("%u", &num);

        uint ret = find_next_palin(num);

        printf("next palindrome is %u\n", ret);
}

uint find_next_palin(uint inp)
{
        char buff[32];
        uint ret, i1 =0, i2 =0, i = 0;

        sprintf(buff, "%d", inp);

        int len = strlen(buff);

        if (len == 1) {
                return inp;
        }

        if (len % 2 == 0) {
                i1 = buff[len/2 -1] - '0';
                i2 = buff[len/2] - '0';

                if (i1 < i2) {
                        buff[len/2 -1] = i1 + '0'+1;
                }
                for (i = 0; i < len/2; i++) {
                        buff[len/2+i] = buff[len/2-i-1];
                }
        } else {
                i1 = buff[len/2 -1] - '0';
                i2 = buff[len/2 +1] - '0';

                if (i1 < i2) {
                        buff[len/2 -1] = i1 + '0'+1;
                }
                for (i = 0; i < len/2; i++) {
                        buff[len/2+i+1] = buff[len/2-i-1];
                }
        }

        sscanf(buff, "%u", &ret);
        return ret;
}