bit segments

#include <stdio.h>

int segments(unsigned n) {
  int r = 1, prevBit = n & 1, bit;
  for (int i = 1; i < sizeof(n) * 8 - 1; i++) {
    bit = (n >> i) & 1;
    r += (bit != prevBit);
    prevBit = bit;
  }
  return r;
}

int main() {
  unsigned n;
  printf("n="); scanf("%u", &n);
  printf("segments: %d\n", segments(n));
  return 0;
}