Byte Splitter Union Basics

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

union ByteSplitter{
   uint16_t word;
   uint8_t bytes[2];
};





int main() {
   uint16_t val;
   cin >> val;
   ByteSplitter u;     
   u.word = val;       
   cout << "LSB=" << (int)u.bytes[0] << " MSB=" << (int)u.bytes[1];
   return 0;
}