https://github.com/j-zhengli/calculator_util

A crate that make it easier to write calculator app.
https://github.com/j-zhengli/calculator_util

Last synced: 3 months ago
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A crate that make it easier to write calculator app.

• Host: GitHub
• URL: https://github.com/j-zhengli/calculator_util
• Owner: J-ZhengLi
• License: mit
• Created: 2021-12-29T06:44:53.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2021-12-29T08:53:36.000Z (over 3 years ago)
• Last Synced: 2025-03-10T03:30:49.565Z (3 months ago)
• Language: Rust
• Size: 8.79 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# calculator_util

A utility dependency that helps you solving mathmatical expressions.

[![Crate](https://img.shields.io/crates/v/calculator_util.svg)](https://crates.io/crates/calculator_util)

[![API](https://docs.rs/calculator_util/badge.svg)](https://docs.rs/calculator_util)

This crate provide implementation for Rust's string type, thus you can evaluate math expression by simply using `String.eval()` for supported format.

### Usage

Add this crate as dependency to your project's `Cargo.toml`.

```toml

[dependencies]

calculator_util = "0.1.2"

```

### Example:

Evaluates a math expression.

```rust

use calculator_util::{ExprParser, number::Number};

let equation = "(5+6) * 7".to_string();

let result = equation.eval();

assert_eq!(result, Number::from(77));

println!("{}", result); // 77

```

Or just convert a math expression to postfix notation.

```rust

use calculator_util::ExprParser;

let equation = "1 + 2 * 3 + -4/2".to_string();

let result: String = equation.to_postfix();

println!("{}", result); // "1 2 3 * + -4 2 / +"

```

# License

This crate is distributed under the terms of MIT license.

See [LICENSE](LICENSE) for details.