## CS 1401 Assignment #6

**Date Assigned:** Monday, October 8, or Tuesday, October 9,
2007.
**Due Date:** Monday, October 15, or Tuesday, October 16, 2007,
before the beginning of your lab section.

**Objective:** The main objective of this assignment is to learn to
use GUI.

**Programming assignment:** design and implement a GUI program
that asks a student for a positive integer and transforms it into
the binary code.

The following algorithm can be used to convert a decimal positive
integer *n* into the binary form (as a string): you divide
*n* by 2, keep a remainder. Divide the result by 2, keep a
remainder, etc. until we get 0. The remainders, when read bottom to
top, form the desired binary number.

**Example of a binary code:** for *n* = 13, we have

13 / 2 = 6 rem 1
6 / 2 = 3 rem 0
3 / 2 = 1 rem 1
1 / 2 = 0 rem 1

When we read the remainders from bottom to top, we get 1101,
which is exactly the binary representation of 13 -- since 1 * 8 + 1
* 4 + 0 * 2 + 1 * 1 = 8 + 4 + 1 = 13.
*Hint:* make a loop in which a string is gradually increased.
Originally, the result-so-far is the input integer (e.g., 13),
the string-so-far is empty.
Within the loop, you divide the result-so-far by 2, compute the
remainder, and add the corresponding one-character string ("0" or
"1") to the left of the string-so-far, etc.

**Homework assignment:** on a separate sheet of paper, solve Ex. 8,
16, and 18 at the end of Chapter 6.

**Deliverables:** as instructed by your TA.