Reverse unsigned int data (Keep Portability)

#include <stdio.h>

unsigned int reverse_bits( unsigned int value )
{
    unsigned int answer;
    unsigned int i = 0;
    static line = 0;
    answer = 0;

    for(i = 1; i != 0; i <<= 1)
    {
        answer <<= 1;
        if(value & 1)
        {
            answer |= 1;
        }
        line ++;
        printf("line:%d,i=%d,value=%u,answer=%u\n",line,i,value,answer);
        printf("");
        value >>= 1;
    }

    return answer;
}

int main()
{
    unsigned int a = 255;
    unsigned int revers_a = 0;

    revers_a = reverse_bits(a);



    printf("-----------Final value----------\n");
    printf("reversed value: %u\n",revers_a);

    return 0;
}