Question

Write a C++ program that creates a base class called Vehicle that includes two pieces of information as data members, namely:

• wheels (type int)
• weight (type float)

Program requirements (Vehicle class):

• Provide set and a get member functions for each data member.
• Your class should have a constructor with two parameters (one for each data member) and it must use the set member functions to initialize the two data members.
• Provide a pure virtual member function by the name displayData() that returns void.

Program requirements (Car class):

• Create a derived class called Car that inherits from Vehicle.
• The Car class must have a new data member called passengerLoad (type int).
• The Car class must have a new setPassagerLoad member function.
• The Car class must have a constructor that calls the base class constructor and additionally it must use the setPassengerLoad to initialize the new data member.
• Provide a virtual member function by the name displayData() to print all the car data.

Program requirements (Truck class):

• Create a derived class called Truck that inherits from Vehicle.
• The Truck class must have a new data member called payLoad (type float).
• The Truck class must have a new setPayLoad member function.
• The Truck class must have a constructor that calls the base class constructor and additionally it must use the setPayLoad to initialize the new data member.
• Provide a virtual member function by the name displayData() to print all the truck data.

Write a main program that demonstrates the polymorphism capabilities, by:

• Creating an object of type Car with the numbers (4, 2.5, 5)
• Creating an object of type Truck with the numbers (8, 4.4, 9.5)
• Create ONE pointer to Vehicle
• Make the pointer point to the Car object
• Call the function displayData() to display the car information
• Make the pointer point to the Truck object
• Call the function displayData() to display the truck information

The following is an example of how your program should run:

Car information

Wheels: 4

Weight: 2.5

PassengerLoad: 5

Truck information

Wheels: 8

Weight: 4.4

PayLoad: 9.5

Answer 1

/*

compile this code in dev c++ you change main method signature if you are using another compiler

*/

#include <iostream>
using namespace std;
class Vehicle
{
   int wheels;
   float weight;
   public:
       Vehicle(int _wheels,float _weight)
       {
           setWheels(_wheels);
           setWeight(_weight);
       }
       void setWheels(int w)
       {
           wheels=w;
       }
       int getWheels()
       {
           return wheels;
       }
       void setWeight(float _weight)
       {
           weight=_weight;
       }
       float getWeight()
       {
           return weight;
       }
       virtual void displayData()
       {
           cout<<"Wheels: "<<getWheels()<<endl;
           cout<<"weight: "<<getWeight()<<endl;
       }
};
class Car:public Vehicle
{
   int passengerLoad;
   public:
       Car(int _wheels,float _weight,int _passengerLoad):Vehicle(_wheels,_weight)
       {
           setPassengerLoad(_passengerLoad);
       }
       void setPassengerLoad(int pass)
       {
           passengerLoad=pass;
       }
       int getPassengerLoad()
       {
           return passengerLoad;
       }
       virtual void displayData()
       {
           cout<<"Car Information"<<endl;
           cout<<"Wheels: "<<getWheels()<<endl;
           cout<<"weight: "<<getWeight()<<endl;
           cout<<"PassengerLoad: "<<getPassengerLoad()<<endl;
       }
};
class Truck: public Vehicle
{
   float payLoad;
   public:
       Truck(int _wheels,float _weight,float _payLoad):Vehicle(_wheels,_weight)
       {
           setPayLoad(_payLoad);
       }
       void setPayLoad(int pass)
       {
           payLoad=pass;
       }
       int getPayLoad()
       {
           return payLoad;
       }
       virtual void displayData()
       {
           cout<<"Truck Information"<<endl;
           cout<<"Wheels: "<<getWheels()<<endl;
           cout<<"weight: "<<getWeight()<<endl;
           cout<<"PayLoad: "<<getPayLoad()<<endl;
       }
};
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char** argv) {
   Car car(4,2.5,5);
   Truck truck(8,4.4,9.5);
   Vehicle* ptrvehicle;
   ptrvehicle=&car;
   ptrvehicle->displayData();
   ptrvehicle=&truck;
   ptrvehicle->displayData();
   return 0;
}

output:-