README.MD

Rust Command-Line Calculator

Welcome to the Rust Command-Line Calculator! This is a simple command-line application written in Rust that allows you to perform basic arithmetic operations.

Features

• Addition
• Subtraction
• Multiplication
• Division
• Percentage
• SquareRoot
• Modulus
• Power

Screenshot

Prerequisites

• Rust (Make sure you have Rust installed on your machine)
• WINDOWS OS

How to Use

1. Download the project files:

   • Download the project files from the provided source (e.g., a ZIP file).
   • Extract the files to a directory of your choice.

2. Navigate to the project directory:

   cd <project-directory>

3. Build the project:

   cargo build

4. Run the project:

   cargo run

5. Using the Calculator:

   • When you run the program, you will be greeted with a welcome message.
   • You will be prompted to enter the first number. Type the number and press Enter.
   • Next, you will be prompted to enter an operator. Choose from the following:
     • + for addition
     • - for subtraction
     • * for multiplication
     • / for division
   • Finally, you will be prompted to enter the second number. Type the number and press Enter.
   • The result of the operation will be displayed.
   • You can continue performing calculations or type q to quit the program.

Example

Welcome to the Rust Command-Line Calculator!

• Enter the first number (or 'q' to quit): 10 Operators:
• Addition
• Subtraction
• Multiplication / Division Enter the operator: + Enter the second number: 5 Result: 10 + 5 = 15
• Enter the first number (or 'q' to quit): q

Thank you for using the calculator! Created by Bubbles The Dev, Goodbye.

Building on a 64-bit System

This project is built and tested on a 64-bit system. Ensure that your Rust installation is configured for 64-bit architecture. You can verify this by running:

rustup target list --installed

• You should see x86_64-unknown-linux-gnu (or a similar 64-bit target) in the list of installed targets.
• WINDOWS OS

License

• This project is licensed under the MIT License. See the LICENSE file for details

Acknowledgements

• Created by Bubbles The Dev

---

---

use std::io::{self, Write};

fn main() {
    println!("Welcome to the Rust Command-Line Calculator!");
    println!("===========================================\n");

    loop {
        // Prompt for the first number
        print!("Enter the first number (or 'q' to quit): ");
        io::stdout().flush().unwrap(); // Ensure the prompt is printed immediately
        let mut num1_str = String::new();
        io::stdin().read_line(&mut num1_str).expect("Failed to read line");
        if num1_str.trim().to_lowercase() == "q" {
            println!("\nThank you for using the calculator! Created by Bubbles The Dev, Goodbye.");
            break;
        }
        let num1: f64 = match num1_str.trim().parse() {
            Ok(num) => num,
            Err(_) => {
                println!("⚠️  Please enter a valid number.\n");
                continue;
            }
        };

        // Prompt for the operator
        println!("\nOperators:");
        println!("  + : Addition");
        println!("  - : Subtraction");
        println!("  * : Multiplication");
        println!("  / : Division");
        println!("  % : Modulus");
        println!("  ^ : Power");
        println!(" sqrt : Square Root");
        print!("\nEnter an operator: ");
        io::stdout().flush().unwrap();
        let mut operator = String::new();
        io::stdin().read_line(&mut operator).expect("Failed to read line");
        let operator = operator.trim();

        // Prompt for the second number if not using sqrt
        let num2: f64;
        if operator != "sqrt" {
            print!("Enter the second number: ");
            io::stdout().flush().unwrap();
            let mut num2_str = String::new();
            io::stdin().read_line(&mut num2_str).expect("Failed to read line");
            num2 = match num2_str.trim().parse() {
                Ok(num) => num,
                Err(_) => {
                    println!("⚠️  Please enter a valid number.\n");
                    continue;
                }
            };
        } else {
            num2 = 0.0; // Placeholder for sqrt operation
        }

        // Perform the calculation
        let result = match operator {
            "+" => num1 + num2,
            "-" => num1 - num2,
            "*" => num1 * num2,
            "/" => {
                if num2 == 0.0 {
                    println!("⚠️  Division by zero is not allowed.\n");
                    continue;
                }
                num1 / num2
            }
            "%" => num1 % num2,
            "^" => num1.powf(num2),
            "sqrt" => num1.sqrt(),
            _ => {
                println!("⚠️  Invalid operator.\n");
                continue;
            }
        };

        // Display the result
        if operator == "sqrt" {
            println!("\nResult: sqrt({}) = {}\n", num1, result);
        } else {
            println!("\nResult: {} {} {} = {}\n", num1, operator, num2, result);
        }
    }
}