Homework 00

Binary Changer

Due 01/30/2026 by 11:55PM

Objective:

Write a program that accepts two four-digit binary numbers, converts them to decimal values, adds them together, and prints both the decimal values and the result of the addition.

Requirements:

• Functionality. (80pts)
• No Syntax, Major Run-Time, or Major Logic Errors. (80pts*)
• *Code that cannot be compiled due to syntax errors is nonfunctional code and will receive no points for this entire section.
• *Code that cannot be executed or tested due to major run-time or logic errors is nonfunctional code and will receive no points for this entire section.
• Clear and Easy-To-Use Interface. (10pts)
• Users should easily understand what the program does and how to use it.
• Users should be prompted for input and should be able to enter data easily.
• Users should be presented with output after major functions, operations, or calculations.
• All the above must apply for full credit.
• Users must be able to enter a 4-bit binary number in some way. (10pts)
• No error checking is needed here and you may assume that users will only enter 0’s and 1’s, and they will only enter 4 bits.
• Binary to Decimal Conversion (50pts)
• You may assume that users will only give numbers that add up to 15.
• See the section Hint for more details.
• Adding Values (10pts)
• Both decimal values must be added together and printed out.
• You may NOT use Integer.parseInt(<<STRING>>, 2) or any automatic converter (80pts*).
• *The use of specifically Integer.parseInt(<<STRING>>,2) will result in a 0 for this entire section.
• You may use Integer.parseInt(<<STRING>>).
• Coding Style. (10pts)
• Readable Code
• Meaningful identifiers for data and methods.
• Proper indentation that clearly identifies statements within the body of a class, a method, a branching statement, a loop statement, etc.
• All the above must apply for full credit.
• Comments. (10pts)
• Your name in the file. (5pts)
• At least 5 meaningful comments in addition to your name. These must describe the function of the code it is near. (5pts)

Hint:

A simple way to convert a binary value to a decimal value.

1. Multiply each binary digit by its corresponding base 2 placement value.

Binary Digit	b0	b1	b2	b3
Base 2 Value	2^3	2^2	2^1	2^0
Result	b0 x 2^3	b1 x 2^2	b2 x 2^1	b3 x 2^0

Example:

Binary Digit	0	1	1	1
Base 2 Value	2^3	2^2	2^1	2^0
Result	0	4	2	1

2. Add the values together to get the decimal value.

Binary Value = b₀ x 2³ + b₁ x 2² + b₂ x 2¹ + b₃ x 2⁰

Example:

Binary Value = 0 + 4 + 2 + 1 = 7

Example Dialog:

*The following Example Dialog demonstrates the interactions between a user and ONE possible implementation of the required software’s front-end / user interface. The software’s front-end / user interface may be implemented in MANY different ways and will receive full credit as long as it meets the most minimal of the above requirements. While you may use the example dialog as a guide, it is strongly encouraged to create the front-end / user interface in your own way. *

Key
Unhighlighted Text	Program’s Output
Highlighted Text	User’s Input

Enter a 4-bit binary number

0111

Enter another 4-bit binary number

0010

The first number is 7

The second number is 2

Added together is 9

Finally:

• Upload the source code file or files (JAVA File Extension) to Homework00
• To Blackboard
• Following these instructions.
• If there are problems, then let the instructor know as soon as possible.