Answer to Question #190277 in C++ for sandeep

Question

Write a program to create a base class: “Question3”, with protected data member: x (int) and with pure virtual function: “Task ()” [Returns no value and takes no argument]. Create a derived class of “Question3” such as “Sub1” (Derive features in public mode). In sub1, there is a member function in public section: get_data1 () to take input for x, and define Task () in this class to display the reverse of x. [Implement the above program by creating pointer to base in main () function and call the necessary functions].

Answer 1

#include <iostream>
using namespace std;


//superclass
class Question3
{
protected:
    int x;
public:
    virtual void Task()=0; //virtual method Task()
};


//child class Sub1
class Sub1:public Question3
{
public:
    //method to input the value of x
    void get_data1(){
        cout<<"\nEnter a value for x: ";
        cin>>x;
    }
    //definition of the pure virtual method
    void Task()
    {
        int reverse=0, rem;
        while(x!=0)
        {
            rem=x%10;
            reverse=reverse*10+rem;
            x/=10;
        }
        cout<<"The reverse is: "<<reverse<<endl;
    }
};


int main()
{
    Question3 *qusObj; //pointer to the baseclass
    Sub1 sub;
    qusObj=&sub;
    //call the child class method
    static_cast<Sub1*>(qusObj)->get_data1();
    qusObj->Task();
    return 0;
}