It is a code that gets some doubles from the user input, and then prints them.
Input looks like this 1 2 3 4.5 x, where x is an arbitrary non-double to break the first for loop.

#include<iostream>
#include<vector>
using namespace std;
int main()
{
    vector<double> *b;
    for (double i; cin >> i;)
    {
        b->push_back(i);
    }

    for (double j:(*b))
    {
        cout << j << endl;
    }
    return 0;
}