Accessing Inherited Functions in C++ HackerRank Solution

Hello Programmers, In this post, you will know how to solve the Accessing Inherited Functions in C++ HackerRank Solution. This problem is a part of the HackerRank C++ Programming Series.

One more thing to add, don’t directly look for the solutions, first try to solve the problems of Hackerrank by yourself. If you find any difficulty after trying several times, then you can look for solutions.

Accessing Inherited Functions in C++ HackerRank Solution

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 2 :

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 3 :

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 5 :

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.
It is guaranteed that new_val has only 2, 3 and 5 as its prime factors.

Input Format :

Implement class D’s function update_val. This function should update D’s val only by calling A, B and C’s func.

Constraints :

1<= new_val <= 10000
Note: The new_val only has 2, 3 and 5 as its prime factors.

Sample Output :

A’s func will be called once.
B’s func will be called once.
C’s func will be called once.

Explanation :

Initially, val = 1.
A’s func is called once:

val = val*2
val = 2

B’s func is called once:

val = val*3
val = 6

C’s func is called once:

val = val*5
val = 30

Accessing Inherited Functions in C++ HackerRank Solutions

#include<iostream>
using namespace std;
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;
        }
};
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;
        }
};
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;
        }
};
/* Accessing Inherited Functions in C++ - Hacker Rank Solution START */
class D : public A,B,C
{
	int val;
	public:
	//Initially val is 1
	D()
	{
	    val = 1;
	}
	//Implement this function
	void update_val(int new_val)
	{
             int a = new_val;
             while(new_val!=0)
             {
                 if(val==a)
                    break;
                 if(new_val%2==0)
                 {
                     A::func(val);
                     new_val/=2;
                 }
                 else if(new_val%3==0)
                 {
                     B::func(val);
                     new_val/=3;
                 }
                 else if(new_val%5==0)
                 {
                     C::func(val);
                     new_val/=5;
                 }
             }
	}
	//For Checking Purpose
	void check(int); //Do not delete this line.
};
/* Accessing Inherited Functions in C++ - Hacker Rank Solution END */
void D::check(int new_val)
{
    update_val(new_val);
    cout << "Value = " << val << endl << "A's func called " << getA() << " times " << endl << "B's func called " << getB() << " times" << endl << "C's func called " << getC() << " times" << endl;
}
int main()
{
    D d;
    int new_val;
    cin >> new_val;
    d.check(new_val);
}

Disclaimer: The above Problem (Accessing Inherited Functions in C++) is generated by Hackerrank but the Solution is Provided by BrokenProgrammers. This tutorial is only for Educational and Learning purposes.

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