安装

安装指南：https://www.rust-lang.org/zh-CN/tools/install

• On Unix, run curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh in your shell. This downloads and runs rustup-init.sh, which in turn downloads and runs the correct version of the rustup-init executable for your platform.
• On Windows, download and run rustup-init.exe.