#include
using namespace std;
void doubleIt(int&);
int main ()
{
int num;
cout << "Enter number: ";
cin >> num;
doubleIt(num);
cout << "The number doubled in main is " << num << endl;
return 0;
}
void doubleIt (int& x)
{
cout << "The number to be doubled is " << x << endl;
x *= 2;
cout << "The number doubled in doubleIt is " << x << endl;
}