OOP: Composition in C++

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

class engine
{
private: int capacity;

public: engine(int c)
        {
            capacity=c;
        }

public: int get_engine()
        {
            return capacity;
        }

public: void show()
        {
            cout<<"Capacity of The engine is == "<<capacity<<endl;
        }
};



class car
{
private: string car_name;

         engine *myengine;

public: car(int cap, string name)
        {
            myengine= new engine(cap);
            car_name=name;
        }

public: void show()
        {
            cout<<"Company name == "<<car_name<<endl;
            myengine->show();
        }
};



int main()
{
    string car_name;
    int capacity_of_car;

    cout<<"Enter the Name of car == "<<endl;
    getline(cin,car_name);

    cout<<"Enter The Capacity of the car == ";
    cin>>capacity_of_car;

    car mycar(capacity_of_car,car_name);

    mycar.show();

    getchar();
    getchar();
    return 0;
}