rust 學習入門

Rust is a systems programming language that runs blazingly fast, prevents nearly all segfaults, and guarantees thread safety. 
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Recommended Version:
1.1.0 (Windows installer)InstallOther Downloads

Featuring

• zero-cost abstractions
• move semantics
• guaranteed memory safety
• threads without data races
• trait-based generics
• pattern matching
• type inference
• minimal runtime
• efficient C bindings

// This code is editable and runnable!

fn main() {

    // A simple integer calculator:

    // `+` or `-` means add or subtract by 1

    // `*` or `/` means multiply or divide by 2

    let program = "+ + * - /";

    let mut accumulator = 0;

    for token in program.chars() {

        match token {

            '+' => accumulator += 1,

            '-' => accumulator -= 1,

            '*' => accumulator *= 2,

            '/' => accumulator /= 2,

            _ => { /* ignore everything else */ }

        }

    }

    println!("The program \"{}\" calculates the value {}",

              program, accumulator);

}