Binary Converter (scope)

Look at the following program:

import java.io.*;

public class Binary
{
    public static void main (String args [])
    {
        int anint = 0;
        String continu = "y";
        System.out.println ("Welcome!");
        while (continu.compareTo ("y") == 0)
        {
            anint = IBIO.inputInt ("Enter an integer between 0 and 32: ");
            System.out.println (anint + " in binary is: " + convert (anint));
            continu = IBIO.inputString ("Would you like to do it again? (y/n) ");
        }
        System.out.println ("Good bye!");
    } //main
    public static int convert (int num)
    { //Pre: num < 0 && num > 32
        //Post: converts the decimal number to binary
        int temp = 0;
        if (num - 16 >= 0)
        {
            num = num - 16;
            temp = temp + 10000;
        }
        if (num - 8 >= 0)
        {
            num = num - 8;
            temp = temp + 1000;
        }
        if (num - 4 >= 0)
        {
            num = num - 4;
            temp = temp + 100;
        }
        if (num - 2 >= 0)
        {
            num = num - 2;
            temp = temp + 10;
        }
        if (num - 1 >= 0)
        {
            num = num - 1;
            temp = temp + 1;
        }
        return temp;
    } //convert
} //Binary class

(a)    Are there any global variables? How can you tell?

(b)   Are there any local variables? How can you tell?

(c)    Are there any parameters? How can you tell?

(d)   Draw a structure chart for the above program.

(e)    What does this program do?