Abstract Communication Driver

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

class CommDriver {
public:
    // TODO:
    // Declare two pure virtual functions:
    // 1. void send(const string& data)
    virtual void send(const string& data) = 0;
    // 2. 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* driver = nullptr;

    if (type == "UART") {
        driver = new UartDriver();
    } else if (type == "SPI") {
        driver = new SpiDriver();
    }

    if (driver) {
        driver->send(msg);
        cout << driver->receive();
        delete driver;
    }

    return 0;
}

Solving Approach