Question

C++ Question

12. Based on our Vector class which only held integers, we want to implement a class Iterator, sufficient to handle a ranged for. (You are not writing any part of the class Vector!!!) Our goal is for the following function to work properly, i.e. to double every int in the Vector v. void double(Vector& v) { for (int& val : v) { val *= 2; } } As you know, the Vector class must support the methods begin() and end(), returning appropriate instances of your Iterator class. The begin() method will initialize its Iterator with a pointer to the beginning of the dynamic array and the end() method will initialize its Iterator with a pointer just past the last item. But this is not your job! It is up to you to define your Iterator class appropriately with any functions needed. Note that you do not have to know anything more about the Vector class, nor do you need access to any of its methods or fields.

Answer 1

The answer of the given problem is below:

The screenshot of the code is given below:

The screenshot of output is:

Enter size of vector: 5 10 20 30 40 50 Vector after doubling 20 40 60 80 100 Program finished with exit code 0 Press ENTER to exit console.

Code:

#include<bits/stdc++.h>
using namespace std;
void Double(vector<int> &v)
{
for(int& val : v)
{
val=val*2;
}
}
int main()
{
int n,i;
cout<<"Enter size of vector: ";
cin>>n;
vector<int> v(n);
vector<int>::iterator it;
for(i=0;i<n;i++)
{
cin>>v[i];
}
Double(v);
cout<<"Vector after doubling\n";
for(i=0;i<v.size();i++)
{
cout<<v[i]<< " ";
}
}

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