C printing bits

Question

I am trying to write a program in C that prints bits of int. for some reason i get wrong values,

void printBits(unsigned int num){
    unsigned int size = si         


        

Answer 1

The result you get is because num&maxPow is either 0 or maxPow. To print 1 instead of maxPow, you could use printf("%u ", num&maxPow ? 1 : 0);. An alternative way to print the bits is

while(maxPow){
    printf("%u ", num&maxPow ? 1 : 0);
    maxPow >>= 1;
}

i.e. shifting the bitmask right instead of num left. The loop ends when the set bit of the mask gets shifted out.