Bitset without padding

Bitset without padding.cpp

#include <bitset>
#include <cstdint>
#include <iostream>

using namespace std;

struct __attribute__((packed)) Data {
  uint32_t timestamp : 32;
  uint32_t gpsLat : 24;
  uint32_t gpsLong : 24;
  uint32_t bit0 : 1;
  uint32_t batteryLevel : 8;
  uint32_t bit1 : 1;
  uint32_t bit2 : 1;
  uint32_t bit3 : 1;
  uint32_t bit4 : 1;
} data;
uint8_t *dataBuffer = (uint8_t *)&data;

int main() {
  data.timestamp = -1;
  data.gpsLat = -1;
  data.gpsLong = -1;
  data.bit0 = 0;
  data.batteryLevel = -1;
  data.bit1 = 0;
  data.bit2 = 1;
  data.bit3 = 0;
  data.bit4 = 1;

  for (int i = 0; i < sizeof(data); i++) {
    cout << bitset<8>(dataBuffer[i]) << endl;
  }
  return 0;
}

/*
Output result should be
11111111
11111111
11111111
11111111
11111111
11111111
11111111
11111111
11111111
11111111
11111110
00010101
*/