Declare an abstract class vehicle, which contains the private variable numofwheel and the public functions vehicle (int), horn (), setnumofwheel (int) and getnumofwheel (). Subclass mot

Declare an abstract class Vehicle, It contains private variables numOfWheels And common functions Vehicle(int)、Horn()、setNumOfWheels(int) and getNumOfWheels(). Subclass Motorcycle and Truck From classes through public inheritance Vehicle Derived from .

Motorcycle There is a private member boolean variable isElectricity, And four common functions setType(bool)、getType()、ChangeType() and Horn().ChangeType() It can be for isElectricity Assign an opposite value , and Horn() You can output a string “ Toot toot , Toot toot ”.

Truck There is a private member variable load, And four public member function constructors Truck(float)、setLoad(float)、getLoad() and Horn(). For classes Truck, Horn() You can output a string " longlong, longlong ".

stay main() Function , Create objects for subclasses respectively mm、tt, And by quoting Vehicle call Horn() To demonstrate the polymorphism of object-oriented programming .

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
using namespace std;

// Declare an abstract class Vehicle,
// It contains private variables numOfWheels And common functions Vehicle(int)、Horn()、setNumOfWheels(int) and getNumOfWheels().
class Vehicle
{
protected:
    int numOfWheels;// Several rounds 
public:
    Vehicle(int n)
    {
        numOfWheels = n;
    }
    virtual void Horn() = 0; 
    virtual void setNumOfWheels(int) = 0;
    virtual int getNumOfWheels() = 0;

};

// Subclass Motorcycle and Truck From classes through public inheritance Vehicle Derived from .
class Motorcycle :public Vehicle
{
private:
    bool isElectricity;
public:
    Motorcycle(int n = 2) :Vehicle(n) { isElectricity = false; };
    void setType(bool b) { isElectricity=b; }
    bool getType() { return isElectricity; }
    void  ChangeType()    { isElectricity =! isElectricity;}
    void setNumOfWheels(int n) { numOfWheels = n; }
    int getNumOfWheels() { return numOfWheels; }
    void Horn() { cout << "dududu, dududu" << endl; }
};

class Truck :public Vehicle
{
private:
    float load;
public:
    Truck(float load,int n=4):Vehicle(n) { this->load = load; }
    void setLoad(bool load) { this->load = load ; }
    bool getLoad() { return load; }
    void setNumOfWheels(int n) { numOfWheels = n; }
    int getNumOfWheels() { return numOfWheels; }
    void Horn() { cout << "longlong, longlong" << endl; }
};

int main()
{
    Motorcycle mm;
    mm.setNumOfWheels(2);
    mm.setType(true);

    Truck tt(12.0);
    tt.setNumOfWheels(4);

    Vehicle *v;
    v = &mm;
    v->Horn();
    v = &tt;
    v->Horn();   
    
    return 0;
}