Computer Science Fundamentals Assignment

Author Information
Name: Hajnalka Horváth
Neptun Code: XXNVW8
Date: 2022.10.01 - 2022.11.30

Overview
This Python script is developed as a part of a Computer Science fundamentals assignment. It was my first project at university in my first semester. It reads two numbers from an input.txt file, performs arithmetic operations on them (in BCD format), and writes the result to an output.txt file. Supported operations include addition, subtraction, multiplication, and division.

Files

• Input: input.txt
• Script: BCD_calculator.py
• Output: output.txt

Prerequisites
Ensure you have Python installed on your machine to execute the script. This code was tested with Python 3.8. No external libraries are required.

How to Use

1. Place the input.txt file in the same directory as the script. The input should consist of two numbers and an arithmetic operation symbol (+, -, *, /) formatted as shown below:

   <number1>
   <operation>
   <number2>
   

2. Run the script using the command:

   python BCD_calculator.py

3. Check the output.txt file for results.

Input Format

• The first line should contain the first number.
• The second line should contain one of the arithmetic operation symbols: +, -, *, or /.
• The third line should contain the second number.

Output Format

• The result of the operation will be written to output.txt in decimal and hexadecimal format.

Functionality

• Read Input: Parses numbers and operation symbol from the input file.
• BCD Conversion: Converts decimal numbers to BCD format for processing.
• Arithmetic Operations: Performs the specified arithmetic operation on the input numbers in BCD format.
• Write Output: Writes the operation result in both decimal and hexadecimal format to the output file.

Limitations

• The script does not handle non-numeric inputs or malformed files gracefully.
• Division by zero will result in an error message being written to the output file.