GoCalc: Interactive command-line calculator

GoCalc is an advanced, interactive command-line calculator written in Go. It combines the simplicity of a basic calculator with the power of a scientific computing tool.

Features

• Interactive REPL (Read-Eval-Print Loop) interface
• Complex mathematical expressions
• Basic arithmetic operations (+, -, *, /, ^)
• Trigonometric functions (sin, cos, tan)
• Logarithmic and exponential functions
• Variable storage and recall
• Parentheses for expression grouping

Installation

1. Ensure you have Go installed on your system. If not, download and install it from golang.org.

2. Clone the repository:

   git clone https://github.com/Bansnetsajak007/GoCalc.git
   cd gocalc
   

3. Build the project:

   go build
   

Usage

Run the program:

./gocalc

Once started, you can enter mathematical expressions. For example:

> 2 + 3 * 4
Result: 14

> sin(pi/2)
Result: 1

> x = 5
x = 5

> y = x^2 + 3
y = 28

> sqrt(y)
Result: 5.291502622129181

Special commands:

• vars: Display all stored variables
• exit: Quit the program

Project Structure

• main.go: Entry point of the application
• evaluator/: Package for expression evaluation
• lexer/: Package for tokenizing input
• repl/: Package for the interactive interface