Print out a bits in an unsigned integer in C

binary_print.c

void binary_print(unsigned int value) {
   unsigned int mask = 0xff000000; // start with a mask for the highest byte
   unsigned int shift = 256*256*256; // start with a shift for the highest byte
   unsigned int byte, byte_iterator, bit_iterator;

   for(byte_iterator=0; byte_iterator < 4; byte_iterator++) {
      byte = (value & mask) / shift; // isolate each byte
      printf(" ");
      for(bit_iterator=0; bit_iterator < 8; bit_iterator++) { // print the byte's bits
         if(byte & 0x80) // if the highest bit in the byte isn't 0
            printf("1");       // print a 1
         else
            printf("0");       // otherwise print a 0
         byte *= 2;         // move all the bits to the left by 1
      }
      mask /= 256;       // move the bits in mask right by 8
      shift /= 256;      // move the bits in shift right by 8
   }
}