Excercises

• 1A MyCompress
• 1B Closest Pair
• 3A http-client
• contributing
• license

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1A MyCompress

Overview

MyCompress is a simple compression utility written in C. It compresses input text by substituting subsequent identical characters with a single occurrence of the character followed by the number of occurrences. This program can process input from either standard input (stdin) or specified input files.

Features

• Compresses text by reducing repeated characters.
• Accepts input from stdin or input files.
• Outputs compressed text to stdout or a specified output file.

Installation

Clone the repository and compile the program using the provided Makefile:

make

Usage

To use MyCompress, you can specify an input file and an optional output file. If no input file is specified, it reads from stdin.

./mycompress [-o outputFile] [inputFiles]

or:

./mycompress [-o outputFile] < input.txt

• -o outputFile: Specifies the output file to write the compressed data. If not provided, output will be written to stdout.
• inputFile: Specifies the input file to read data from. If not provided, input will be read from stdin.

Example

Compressing a file:

./mycompress -o output.txt input.txt

Reading from stdin and writing to stdout:

echo "aaabbbbcc" | ./mycompress

Dependencies

• GCC for compiling the C program.
• Standard C libraries.

Contributing

Contributions to improve MyCompress are welcome. Please follow these steps to contribute:

1. Fork the repository.
2. Create a new branch for your feature or fix.
3. Commit your changes with clear commit messages.
4. Push your changes to the branch.
5. Create a pull request.

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1B Closest Pair

Overview

This project implements an algorithm to find the closest pair of points in a given set of points. The main logic of the project is contained in cpair.c, which uses various helper functions and structures defined in cpair.h, includes.h, and helperFunctions.c.

Features

Efficient calculation of the closest pair of points. Utilization of various data structures and algorithms for optimal performance. Modular codebase with clear separation of concerns.

How to Build

The project can be built using the provided Makefile. Simply run the following command in the project directory:

make

Usage

After building the project, you can run the program with the following command:

./cpair < input.txt

or you can:

echo -e "4 90\n4 89\n4 200\n4 -100" | ./cpair

Input the points as instructed by the program, and it will output the closest pair of points.

Files Description

cpair.c: Main file containing the program's entry point and core logic. cpair.h: Header file for cpair.c, containing function prototypes and structure definitions. includes.h: Common includes and definitions used across the project. helperFunctions.c: Auxiliary functions supporting the main algorithm in cpair.c.

Algorithm

The program uses a divide-and-conquer approach to find the closest pair of points, which is more efficient than the brute force method for large datasets.

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3A http-client

Overview

The "3A http-client" is a simple yet powerful HTTP client written in C. It is capable of sending HTTP GET requests to a specified URL and handling the responses appropriately. The project is structured with a focus on modularity and reusability, separating the core functionalities into different helper functions.

Features

• Send HTTP GET requests to specified URLs.
• Handle HTTP responses and output the received data.
• Parse command-line arguments to specify request details like port, file, and directory.
• Efficiently handle URLs, extracting hostname and resource paths.
• Robust error handling and dynamic memory management.

Installation

To install the http-client, clone the repository and compile the program using the provided Makefile:

make client

Usage

To use the http-client, run the compiled executable with the necessary arguments:

./client [-p PORT] [-o FILE | -d DIR] URL

Options:

• -p PORT: Specify the port number for the HTTP request.
• -o FILE: Direct the output to a specified file.
• -d DIR: Specify a directory for the output.
• URL: The URL for the HTTP GET request.

Example Usage:

./client http://www.example.com/ > tests/test_A01.html
./client -o tests/test_A02.html http://www.example.com/
./client -d tests/ http://www.example.com/
./client -d tests http://www.example.com/
./client -f tests http://www.example.com/
./client -f tests.html http://www.example.com/

Dependencies

• C standard libraries.
• POSIX compliant system for network and file operations.

Contributing

Contributions to enhance the http-client are encouraged. Please follow the standard procedure for contributions as outlined in the contributing section.

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Contributing

Contributions to the project are welcome. Please follow the standard GitHub pull request process to submit your changes.

License

Just don't copy and hand in this assignment. If you do something else with it, I don't care.

Author

Chrisvenator