C++

Given the following C++ segment:

cout << " enter a positive integer ";

cin >> num; do {

 cout << num % 10; 

num /= 10; }while (num > 0); cout << ' ';

1. (i) What is the output, if the input is 401?

2. (ii) What does the program segment above do?

3. (iii) Which variable is the loop control variable?

4. (iv) Rewrite the program segment above using a for loop.