Packet Field ID or Value

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

// your code here: define enum class Kind and struct Packet with tagged union
enum class Kind {
    Id,
    Value
};

struct Packet {
    Kind kind;
    union {
        uint16_t id;
        int value;
    };
};
int main() {
   string type;
   int num;
   cin >> type >> num;
   Packet p;
   if (type == "Id") {
       p.kind = Kind::Id;
       p.id = (uint16_t)num;
   } else if (type == "Value") {
       p.kind = Kind::Value;
       p.value = num;
   }
   if (p.kind == Kind::Id) {
       cout << "ID=" << p.id;
   } else if (p.kind == Kind::Value) {
       cout << "VALUE=" << p.value;
   }
   return 0;
}