/*
    Ch5Ex8.java
    CIS 160
    David Klick
    2004-10-22

    Various while loop problems (answer to Chapter 5, exercise 8)
*/

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class Ch5Ex8 {
    public static void main(String[] args) throws IOException {
        BufferedReader kbd = new BufferedReader(
            new InputStreamReader(System.in));
        int n1, n2, tmp, i, sum;

        // get two integers from user
        System.out.print("Please enter an integer: ");
        n1 = Integer.parseInt(kbd.readLine());
        System.out.print("Please enter an integer larger than " + n1 + ": ");
        n2 = Integer.parseInt(kbd.readLine());

        // guarantee than n1 is less than or equal to n2
        if (n1 > n2) {
            tmp = n1;
            n1 = n2;
            n2 = tmp;
        }

        // output all odd numbers between n1 and n2
        i = n1;
        if (i % 2 == 0) i++;
        while (i<=n2) {
            System.out.print(i + " ");
            i+=2;
        }
        System.out.println();

        // output sum of even numbers between n1 and n2
        i = n1;
        if (i % 2 != 0) i++;
        sum = 0;
        while (i<=n2) {
            sum += i;
            i+=2;
        }
        System.out.println("The sum of the even numbers is " + sum);

        // output squares from 1 to 10
        System.out.println("n\tn * n");
        i = 1;
        while (i<=10) {
            System.out.println(i + "\t" + (i*i));
            i++;
        }
        System.out.println();

        // output sum of squares of odd numbers from n1 to n2
        i = n1;
        if (i % 2 == 0) i++;
        sum = 0;
        while (i<=n2) {
            sum += (i * i);
            i+=2;
        }
        System.out.println("The sum of the odd squares is " + sum);

        // output all uppercase letters
        char c = 'A';
        while (c <= 'Z') {
            System.out.print(c);
            c++;
        }
    }
}