Float to Bytes Type Punning

#include <iostream>
#include <iomanip>
#include <cstdint>
using namespace std;

// your code here: define a union with float f and uint8_t bytes[4]
union FloatBytes {
    float f;
    uint8_t bytes[4];
};

int main() {
   float val;
   cin >> val;
   FloatBytes u;   // use your union
   u.f = val;
   cout << hex << uppercase << setfill('0');
   for (int i = 0; i < 4; i++) {
       cout << setw(2) << (int)u.bytes[i] << " ";
   }
   return 0;
}