Accessing Inherited Functions.cpp-HackerRank

Problem-You are given three classes A, B and C. All three classes implement their own version of func.

In class A, func multiplies the value passed as a parameter by :

class A
{
    public:
        A(){
            callA = 0;
        }
    private:
        int callA;
        void inc(){
            callA++;
        }

    protected:
        void func(int & a)
        {
            a = a * 2;
            inc();
        }
    public:
        int getA(){
            return callA;
        }
};

In class B, func multiplies the value passed as a parameter by :

class B
{
    public:
        B(){
            callB = 0;
        }
    private:
        int callB;
        void inc(){
            callB++;
        }
    protected:
        void func(int & a)
        {
            a = a * 3;
            inc();
        }
    public:
        int getB(){
            return callB;
        }
};

In class C, func multiplies the value passed as a parameter by :

class C
{
    public:
        C(){
            callC = 0;
        }
    private:
        int callC;
        void inc(){
            callC++;
        }
    protected:
        void func(int & a)
        {
            a = a * 5;
            inc();
        }
    public:
        int getC(){
            return callC;
        }
};

You are given a class D:

class D 
{

	int val;
	public:
		//Initially val is 1
		 D()
		 {
		 	val = 1;
		 }
		 //Implement this function
		 void update_val(int new_val)
		 {
			
		 }
		 //For Checking Purpose
		 void check(int); //Do not delete this line.
};

You need to modify the class D and implement the function update_val which sets D's val to new_val by manipulating the value by only calling the func defined in classes A, B and C.

Solution-

class D : public A,public B,public C

{

 int val;

  public:

   D()

   {

    val=1;

   }

   void update_val(int new_val)

   {

          int a = new_val;

     while ( a %2 == 0)

     {

         a = a/2;

         A::func(val);

     }

     while ( a % 3 == 0)

     {

         a = a/3;

         B::func(val);

     }

     while ( a % 5 == 0)

     {

         a = a/5;

         C::func(val);

     }

   

   }

   void check(int);

};

Link to the problem:-

https://www.hackerrank.com/challenges/accessing-inherited-functions/problem

Result!