Abstract Communication Driver UART vs SPI

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

class CommDriver {
public:
   // your code here: declare pure virtual functions
   // void send(const string& data)
   virtual void send(const string& data) = 0;
   // string receive()
   virtual string receive() = 0;
   virtual ~CommDriver() = default;
};

class UartDriver : public CommDriver {
private:
   string last;
public:
   void send(const string& data) override {
       last = data;
       cout << "UART SEND: " << data << "\n";
   }
   string receive() override {
       return string("UART RECV: ") + last;
   }
};

class SpiDriver : public CommDriver {
private:
   string last;
public:
   void send(const string& data) override {
       last = data;
       cout << "SPI SEND: " << data << "\n";
   }
   string receive() override {
       return string("SPI RECV: ") + last;
   }
};

int main() {
   string type, msg;
   cin >> type >> msg;
   CommDriver* d = nullptr;
   if (type == "UART") {
       d = new UartDriver();
   } else if (type == "SPI") {
       d = new SpiDriver();
   }
   if (d) {
       d->send(msg);
       cout << d->receive();
       delete d;
   }
   return 0;
}