quad-checker

A command-line tool written in Go that checks whether an ASCII figure is a valid quadrilateral — and if so, tells you exactly what kind.

What it does

You pass an ASCII shape through the command line, and quad-checker analyzes it and tells you what kind of quadrilateral it is — or tells you it isn't one at all.

Possible results include:

• Square
• Rectangle
• Rhombus
• Parallelogram
• Trapezoid
• Invalid — if the figure doesn't form a valid quadrilateral

Usage

go run . "<your ASCII figure>"

Examples

go run . "+---------+
|         |
|         |
+---------+"
# Output: Rectangle

go run . "+----+
|    |
|    |
+----+"
# Output: Square

How it works

The program reads the ASCII figure passed as a command-line argument, parses its structure, and applies geometric logic to classify the shape based on its dimensions and proportions.

No external libraries are used — just Go's standard library.

Getting started

Prerequisites: Go 1.18 or later

go build -o quad-checker ./quad-checker "

"

## Built with

- [Go](https://golang.org/) — standard library only

## Author

**Believe Timothy** — [@believetimothy](https://github.com/believetimothy)

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