C reverse bits in unsigned integer

Question

I\'m converting an unsigned integer to binary using bitwise operators, and currently do integer & 1 to check if bit is 1 or 0 and output, then right shift by 1 to divide

Answer 1

you could move from left to right instead, that is shift a one from the MSB to the LSB, for example:

unsigned n = 20543;
unsigned x = 1<<31;
while (x) {
    printf("%u ", (x&n)!=0);
    x = x>>1;
}