Accessing Inherited Functions C++

Problem Statement :

```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  <= 1000
Note: The new_val only has 2, 3 and 5 as its prime factors.```

Solution :

```                            ```Solution in C :

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)
{
while (new_val!=val) {
if (new_val/val % 2 == 0) A::func(val);
else if (new_val/val % 3 == 0) B::func(val);
else if (new_val/val % 5 == 0) C::func(val);
}
}
//For Checking Purpose
void check(int); //Do not delete this line.
};```
```

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