Hacker Rank solution for Accessing Inherited Functions In C++

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Explanation:-

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

class A
{
protected:
void func(int & a)
{
a=a*2;
}
}

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

class B
{
protected:
void func(int & a)
{
a=a*3;
}
}

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

class C
{
protected:
void func(int & a)
{
a=a*5;
}
}

You are given a class D:

class D
{

int val;
public:
//Initially, val is 1
D()
{
val=1;
}

//Implement this function we have to modify class D
void update_val(int new_val)
{

}
}

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Solution:-

#include<iostream>

using namespace std;

int callA=0;
int callB=0;
int callC=0;
class A
{
protected:

void func(int & a)
{
a=a*2;
callA++;
}
};

class B
{
protected:
void func(int & a)
{
a=a*3;
callB++;
}
};

class C
{
protected:
void func(int & a)
{
a=a*5;
callC++;
}
};

class D : public A,public B,public 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 ( 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);
}

}
//For Checking Purpose
void check(int); //Do not delete this line.
};

void D::check(int new_val)
{
update_val(new_val);
cout<<"Value = "<<val<<endl<<"A's func called "<<callA<<" times "<<endl<<"B's func called "<<callB<<" times "<<endl<<"C's func called "<<callC<<" times"<<endl;
}

int main()
{
D d;
int new_val;
cin>>new_val;
d.check(new_val);

}

Output:-